USCG General Navigation: Master's License


4: Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are __________.

5: A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line?

6: Wind velocity varies __________.

7: The period at high or low tide during which there is no change in the height of the water is called the __________.

8: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.

9: When displayed under a single-span fixed bridge, red lights indicate __________.

10: The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125 at 0.6 knot. What current should you expect?

11: A buoy having red and green horizontal bands would have a light characteristic of __________.

12: Lines on a chart which connect points of equal magnetic variation are called __________.

13: Most modern Loran-C receivers, when not tracking properly, have a(n) __________.

14: You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?

15: What is the length of a nautical mile?

16: The direction of the surface wind is __________.

17: "Stand" of the tide is that time when __________.

18: A vessel's position should be plotted using bearings of __________.

19: You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________.

20: You are underway on course 050T and your maximum speed is 12 knots. The eye of a hurricane bears 120T, 110 miles from your position. The hurricane is moving towards 285T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

21: Which buoy is NOT numbered?

22: Charts showing the coast of Mexico are produced by the United States __________.

23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.

25: You are in LONG 144E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.

26: Wind direction may be determined by observing all of the following EXCEPT __________.

27: Spring tides are tides that __________.

28: When using a buoy as an aid to navigation which of the following should be considered?

29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.

30: When taking an amplitude, the Sun's center should be observed on the visible horizon when __________.

31: When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.

32: The datum used for soundings on charts of the Atlantic Coast of the United States is mean __________.

34: The Local Notice to Mariners is usually published __________.

35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?

37: What does the term "tide" refer to?

38: When navigating a vessel, you __________.

39: Civil twilight begins at 1910 zone time on 20 July 1981. Your DR position at that time is LAT 2216'N, LONG 15006'W. Which statement concerning the planets available for evening sights is TRUE?

40: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current?

41: Mean high water is the reference plane used for __________.

41: Mean high water is the reference plane used for __________.

42: The datum used for soundings on charts of the East Coast of the United States is __________.

43: A buoy with a composite group-flashing light indicates a(n) __________.

44: The speed of sound through ocean water is nearly always __________.

45: The navigator aboard a ship at approximately 165E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?

46: What wind reverses directions seasonally?

47: The range of tide is the __________.

48: When should a navigator rely on the position of floating aids to navigation?

49: While steering a course of 150T, you wish to observe a body for a latitude check. What would the azimuth have to be?

50: The difference between the heights of low and high tide is the __________.

51: In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark __________.

52: The reference datum used in determining the heights of land features on most charts is __________.

55: Your longitude is 17959'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 17959'E longitude. Your LMT and date are __________.

56: A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is called __________.

57: The height of tide is the __________.

58: You should plot your dead reckoning position __________.

59: For navigational purposes, each great circle on the Earth has a length of __________.

60: The predicted time that the ebb begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1630 and turn for 12 knots, at what point will you lose the flood current?

61: Red lights may appear on __________.

62: Charted depth is the __________.

63: A "full service" Loran-C receiver will provide __________.

64: Mean lower low water is the reference plane used for __________.

65: The LMT of LAN is 1210. Your longitude is 7030'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?

66: What will a veering wind do?

67: What is the definition of height of tide?

68: A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) __________.

69: The parallax angle will vary the most with the time of year for __________.

70: The station located at "A" is the __________. (D001NG )

71: A preferred-channel buoy may be __________.

72: The datum from which the predicted heights of tides are reckoned in the tide tables is __________.

74: When operated over a muddy bottom, a fathometer may indicate __________.

75: The zone time of LAN is 1152. Your longitude is 7315'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?

76: In the Northern Hemisphere, a wind that shifts counterclockwise is a __________.

77: When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.

78: A single line of position combined with a dead-reckoning position results in a(n) __________.

79: The rate of increase in hour angle is the slowest for __________.

80: When the moon is at first quarter or third quarter phase, what type of tides will occur?

81: A buoy with a composite group-flashing light indicates a(n) __________.

82: On the west coast of North America, charted depths are taken from __________.

83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit __________.

84: When using an echo sounder in deep water, it is NOT unusual to __________.

85: Your longitude is 17959'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 17959'E longitude. Your LMT and date is now __________.

86: A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it will __________.

87: A tide is called diurnal when __________.

88: Which position includes the effects of wind and current?

89: The GHA of the first point of Aries is 315 and the GHA of a planet is 150. What is the right ascension of the planet?

90: When the moon is new or full, which type of tides occur?

91: A preferred-channel buoy will show a __________.

92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.

93: The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with __________.

94: When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom?

95: The difference in local time between an observer on 114W and one on 119W is __________.

96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.

97: The lunar or tidal day is __________.

98: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

99: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

100: You are underway on course 050T and your maximum speed is 12 knots. The eye of a hurricane bears 080T, 100 miles from your position. The hurricane is moving towards 265T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?

101: A lighted preferred-channel buoy may show a __________.

102: Which statement about an NGA (NIMA) chart with stock no.23BHA23433 is TRUE?

103: In Loran-C the high accuracy of atomic time and frequency controls allows each station to operate __________.

104: What should you apply to a fathometer reading to determine the depth of water?

105: If the GMT is 1500, the time at 75E longitude is __________.

106: A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a __________.

107: The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________.

108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.

109: While proceeding along the Norwegian coast on course 039T, you sight the black-yellow-black banded buoy shown bearing 053T. What action should you take? (D021NG )

110: A millibar is a unit of __________.

111: Green lights may appear on __________.

112: Which chart number indicates an NGA (NIMA) chart designed for inshore coastwise navigation?

113: The type of transmission used in Loran-C is a __________.

114: All echo-sounders can measure the __________.

114: All echo-sounders can measure the __________.

115: The date is the same all over the world at __________.

116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?

117: Mean high water is the average height of __________.

118: What describes an accurate position that is NOT based on any prior position?

119: While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown. Your course is 039T, and the buoy bears 053T. What action should you take? (D020NG )

120: You are underway on course 050T and your maximum speed is 13 knots. The eye of a hurricane bears 100T, 120 miles from your position. The hurricane is moving towards 275T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be the maximum CPA?

121: A safe water mark may be __________.

122: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?

123: If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the __________.

124: An electronic depth finder operates on the principle that __________.

125: The GMT is 0445 and your zone description is +1. Your zone time is __________.

126: A katabatic wind blows __________.

127: Mean low water is the average height of __________.

128: A position obtained by applying only your vessel's course and speed to a known position is a __________.

129: In working out a local apparent noon sight for your latitude, you subtract the Ho from 90. The 90 represents the angular distance from __________.

130: The distance between the surface of the water and the tidal datum is the __________.

131: A vertically-striped buoy may be __________.

132: The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.

133: The line connecting the Loran-C master station with a secondary station is called the __________.

134: The recording fathometer produces a graphic record of the __________.

135: The standard meridian for the time zone +1 is __________.

136: Which Beaufort force indicates a wind speed of 65 knots?

137: Priming of the tides occurs __________.

138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________.

139: What is the geographic longitude of a body whose GHA is 21515'?

140: You are underway on course 050T and your maximum speed is 12 knots. The eye of a hurricane bears 080T, 100 miles from your position. The hurricane is moving towards 265T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

141: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133T, and bears 042T, 105 miles from you. What is the time to intercept if you make 10 knots?

142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?

143: Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?

144: In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.

145: The standard time meridian for zone description -1 is __________.

146: What change in the wind direction could be expected at position "D" if the low were moving northeasterly? (D049NG )

147: Which statement is TRUE concerning equatorial tides?

148: When possible, a DR plot should always be started from where?

149: You are underway on course 050T and your maximum speed is 13 knots. The eye of a hurricane bears 100T, 120 miles from your position. The hurricane is moving towards 275T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?

150: An alternating light __________.

151: Under the U.S. Aids to Navigation System, spherical buoys may be __________.

152: A chart with a natural scale of 1:160,000 is classified as a __________.

153: The line extending beyond the stations at A and B is referred to as the __________. (D004NG )

154: Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?

155: The velocity of the current in large coastal harbors is __________.

156: In reading a weather map, closely spaced pressure gradient lines would indicate __________.

157: Tropic tides are caused by the __________.

158: Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be __________.

159: The apparent wind can be zero when the true wind is from __________.

161: How is a safe water mark, that can be passed close aboard on either side, painted and lighted?

162: A chart with a scale of 1:80,000 would fall into the category of a __________.

163: How many fixed objects are needed to plot a running fix?

164: The part of a sextant mounted directly over the pivot of the index arm is the __________.

165: On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?

166: On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________.

167: When the Moon's declination is maximum north, which of the following will occur?

168: Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?

169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot?

170: Which of the buoy symbols in illustration D032NG indicates a safe water mark?

171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

172: A chart with a scale of 1:45,000 is a __________.

174: The position labeled D is a(n) __________. (D051NG )

175: On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?

176: Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?

177: How many high waters usually occur each day on the East Coast of the United States?

178: You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?

179: You are proceeding up a channel at night. It is marked by a range which bears 185T. You steady up on a compass course of 180 with the range in line dead ahead. This indicates that you(r) __________.

180: What is a lighted safe water mark fitted with to aid in its identification?

181: Which navigational mark may only be lettered?

182: The scale on a chart is given as 1:5,000,000. This means that __________.

184: When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45 to each other, the arc reads __________.

185: A ship is in longitude 5400'W on a true course of 270. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?

186: In the doldrums you will NOT have __________.

187: Which statement is TRUE concerning apogean tides?

188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.

189: While steering a course of 150T, you wish to observe the Sun for a speed check. What would the azimuth have to be?

190: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

191: Safe water buoys may show ONLY __________.

192: The description "Racon" beside an illustration on a chart would mean a __________.

193: In using Loran-C, skywave reception gives greater range but is __________.

194: The horizon glass of a sextant is __________.

195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2W of the central meridian of your time zone, when will the apparent Sun cross your meridian?

196: The area of strong westerly winds occurring between 40S and 60S latitude is called the __________.

197: Chart legends printed in capital letters show that the associated landmark is __________.

198: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133T, and bears 343T at 92 miles from you. What is the time to intercept if you make 9 knots?

199: Civil twilight occurs at 0558 zone time on 30 December 1981. Your DR position at that time is LAT 1502'N, LONG 4602'W. Which statement concerning the planets available for morning sights is TRUE?

200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?

201: What is a lighted safe water mark fitted with to aid in its identification?

202: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

203: In any Loran-C chain, there are three or more stations transmitting pulses which radiate in all directions. One of the stations is the master station, and the others in the chain are the __________.

204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60 on the limb, the actual arc of the limb from 0 to the 60 reading is __________.

205: The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.

206: The winds you would expect to encounter in the North Atlantic between latitudes 5 and 30 are known as the __________.

207: An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?

208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?

209: The West Wind Drift is located __________.

210: The position labeled C is a(n) __________. (D051NG )

211: The light rhythm of Morse (A) is shown on __________.

212: Which aid is NOT marked on a chart with a magenta circle?

213: When using GPS, how many theoretical position lines are required for a two-dimensional fix?

214: A sextant having an index error that is "on the arc" has a __________.

215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?

216: The prevailing winds in the band of latitude from approximately 5N to 30N are the __________.

217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.

218: Lines of position may be __________.

219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current?

220: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?

221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of __________.

222: Which statement concerning the illustration is correct? (Soundings and heights are in meters) (D010NG )

223: In the Loran-C configuration shown, the stations located at X, Y, and Z are called __________. (D003NG )

224: A sextant having an index error that is "off the arc" has a __________.

225: The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at __________.

226: What winds blow towards the equator from the area about 30 north?

227: The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is __________.

228: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a convergence line? (D042NG )

229: The shoreline on charts generally represents the mean __________.

230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.

230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.

231: You are outbound in a buoyed channel on course 015T. You sight a white light showing a Morse (A) characteristic bearing 359 relative. For safety, you should __________.

232: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

234: When the declination of the Moon is 012.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.

236: The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.

237: Neap tides occur when the __________.

238: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current?

238: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current?

239: As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys __________.

240: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

241: A spherical buoy may be __________.

242: The difference between the heights of low and high tide is the __________.

243: The loran lines drawn on navigation charts represent __________.

244: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

245: Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error?

246: The consistent winds blowing from the horse latitudes to the doldrums are called the __________.

247: Neap tides occur __________.

248: What is the index error of sextant A in illustration D050NG? (D050NG )

249: When using GPS, how many theoretical position lines are required for a three-dimensional fix that takes into account altitude?

250: Weather systems in the middle latitudes generally travel from __________.

251: A mid-channel buoy, if lighted, will show a __________.

252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )

253: Loran-C is which type of system?

254: The range of tide is the __________.

255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?

256: The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the __________.

257: Spring tides occur __________.

258: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )

260: The National Ocean Service publishes the __________.

261: You are heading out to sea in a buoyed channel and see a quick-flashing green light on a buoy ahead of you. In U.S. waters, you should leave the buoy __________.

262: Which of the buoy symbols shown indicates a safe water mark? (D032NG )

263: Loran-C uses the multiple pulse system because __________.

264: Which of the four adjustable errors in the sextant is the principle cause of index error?

265: It is 1200 local time for an observer at 54E longitude. Which statement is TRUE?

266: The horse latitudes are characterized by __________.

267: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

268: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "L" represents a __________. (D042NG )

269: The wind at Frying Pan shoals has been south-southwesterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 232 at 0.8 knot. What current should you expect?

270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )

271: Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?

272: What does the symbol shown indicate on a chart? (D033NG )

273: Loran-C is which type of navigation system?

274: Which of the four adjustable errors in the sextant causes side error?

275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )

276: The region of high pressure extending around the Earth at about 35N latitude is called the __________.

277: Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________.

278: You are underway on course 050T and your maximum speed is 11 knots. The eye of a hurricane bears 070T, 80 miles from your position. The hurricane is moving towards 270T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?

279: As a vessel changes course to starboard, the compass card in a magnetic compass __________.

280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

281: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.

282: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?

283: Loran-C operates on a single frequency centered on __________.

284: The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is __________.

285: The apparent wind is zero when the true wind is __________.

286: On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the __________.

287: The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.

288: When using a radar in a unstabilized mode, fixes are determined most easily from __________.

289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.

290: The true wind is from 330T, speed 6 knots. You want the apparent wind to be 30 knots from 10 on your port bow. To what course and speed must you change?

291: A buoy marking a wreck will show a(n) __________.

292: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess?

293: The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of __________.

294: What is a nonadjustable error of the sextant?

295: The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.

296: The wind flow from the horse latitudes to the doldrums is deflected due to __________.

297: The tides in Boston Harbor generally __________.

298: A great circle crosses the equator at 173E. It will also cross the equator at what other longitude?

299: Steady precipitation is typical of __________.

300: Which of the symbols shown represents a warm front? (D018NG )

301: In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic?

302: Which symbol represents a 20-fathom curve?

304: In order to remove index error from a sextant, you should adjust the __________.

305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

306: Weather conditions in the middle latitudes generally move __________.

307: The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.

308: The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323 at 0.6 knot. What current should you expect?

309: You are underway on course 050T and your maximum speed is 12 knots. The eye of a hurricane bears 120T, 110 miles from your position. The hurricane is moving towards 285T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?

310: Which sextant shown has an index error of 3'30" off the arc? (D050NG )

311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.

312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.

313: The Loran-C receiver __________.

313: The Loran-C receiver __________.

314: Which of these sextant errors is nonadjustable?

315: Which statement about the time diagram shown DO08NG is TRUE?

316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.

317: The time meridian used for tide computations in New York Harbor is __________.

318: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.

319: The Illustration shows the symbols used by radio facsimile weather charts. The symbol indicated at letter "F" represents a __________. (D042NG )

320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.

321: Which buoy may be even numbered?

323: The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as __________.

324: Index error of a sextant is primarily caused by __________.

325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 21030'?

326: You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the __________.

327: When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________.

328: The direction of prevailing winds in the Northern hemisphere is caused by the __________.

329: The symbols shown are used on radio facsimile weather charts. Which symbol indicates a weather boundary? (D042NG )

330: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

331: What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)

333: Loran-C stations transmit groups of pulses at specific times. The time interval between transmissions from the master station is the __________.

334: The index error is determined by adjusting the __________.

335: What is the geographic longitude of a body whose GHA is 23227'?

336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.

337: To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.

338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents __________. (D042NG )

339: The wind at Frying Pan shoals has been north-northeasterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 355 at 0.8 knot. What current should you expect?

340: Information about the direction and velocity of rotary tidal currents is found in the __________.

341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?

342: A polyconic projection is based on a __________.

344: A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has __________.

345: A navigator fixing a vessel's position by radar __________.

346: If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?

347: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates rain? (D042NG )

348: When using a radar in an unstabilized mode, fixes are determined most easily from __________.

349: The direction of the southeast trade winds is a result of the __________.

350: When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called the __________.

351: Which buoy may be odd numbered?

352: Which chart projection would be most suitable for marine surveying?

354: In order to remove side error from a sextant, you should adjust the __________.

355: During the month of October the Sun's declination is __________.

356: When facing into the wind in the Northern Hemisphere the center of low pressure lies __________.

357: On 10 August 1983 you will dock near Days Point, Weehawken, on the Hudson River, at 1800 DST (ZD +4). The charted depth alongside the pier is 24 feet (7.3 meters). What will be the depth of water when you dock?

358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983?

359: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233T, and bears 264T, 68 miles from you. What is the time to intercept if you make 13 Knots?

360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )

361: As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy?

362: Which statement about a simple conic chart projection is TRUE?

363: Your dead reckoning position should be plotted __________.

364: What causes the error of collimation with regards to the four adjustments to a sextant?

365: The Sun at a maximum declination north would be approximately at __________.

366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.

367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983?

368: A great circle crosses the equator at 134E. It will also cross the equator at what other longitude?

369: You are underway on course 050T and your maximum speed is 11 knots. The eye of a hurricane bears 070T, 80 miles from your position. The hurricane is moving towards 270T at 19 knots. What course should you steer at 11 knots to have the maximum CPA?

370: Prevailing winds between 30N and 60N latitude are from the __________.

371: Which buoy may be odd numbered?

372: You would find the variation on a polyconic projection chart __________.

373: How is a navigation light on the Mississippi River identified on an Army Corps of Engineers navigation map?

374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?

375: If the Sun's observed altitude is 4750', the zenith distance is __________.

376: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the __________.

377: Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983.

378: A navigator fixing a vessel's position by radar __________.

379: The steady current circling the globe at about 60S is the __________.

380: Prevailing winds between 30N and 60N latitude are from the __________.

381: A nun buoy will __________.

382: Which would you consult for information about the general current circulation in the North Atlantic Ocean?

384: Which is a nonadjustable error of the sextant?

385: The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.

386: Your vessel is on course 180T speed 22 knots. The apparent wind is from 70 off the port bow, speed 20 knots. The true direction and speed of the wind are __________.

388: You are underway on course 120T and your maximum speed is 12 knots. The eye of a hurricane bears 150T, 120 miles from your position. The hurricane is moving towards 295T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.

390: During the winter months, the southeast trade winds are __________.

391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.

392: A pilot chart does NOT contain information about __________.

394: An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.

395: If the Sun's observed altitude is 2712', the zenith distance is __________.

396: Your vessel is on course 150T, speed 17 knots. The apparent wind is from 40 off the starboard bow, speed 15 knots. What is the speed of the true wind?

397: The mean tide level at Peaks Island, ME, is __________.

398: The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the __________.

399: Where will you find information about the duration of slack water?

400: Information about the currents for the Pacific Coast of the U. S. are found in the __________.

401: You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?

402: All of the following can be found on a Pilot Chart EXCEPT information concerning the __________.

404: An aneroid barometer is an instrument __________.

405: At upper transit, if the zenith distance is 34, the geographical distance from the observer to a body's GP is __________.

406: Your vessel is on course 135T, speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40 on the starboard bow. Determine the speed of the apparent wind.

407: What would be the height of the tide at Crisfield, MD, at 0310 DST (ZD +4) on 6 May 1983?

408: A buoy bears 176T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port?

409: On November 1st the zone time is 1700 EST (ZD +5) in LONG 75W. What is the corresponding zone time and date in LONG 135E?

410: The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be __________.

411: When entering from seaward, a buoy displaying a single-flashing red light would indicate __________.

412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.

414: The barometer is an instrument for measuring the __________.

415: If the Sun's observed altitude is 5430', what is the zenith distance?

416: A ship is on course 195 at a speed of 15 knots. The apparent wind is from 40 on the port bow, speed 30 knots. The direction and speed of the true wind are __________.

417: On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY?

418: In most cases, the direction of the apparent wind lies between the bow and __________.

419: The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the __________.

420: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

421: Daylight savings time is a form of zone time that adopts the time __________.

422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?

424: For an accurate barometer check, you would __________.

425: 90 - Ho = __________.

426: The wind speed and direction observed from a moving vessel is known as __________.

427: On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet?

428: A buoy bears 178T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard?

429: A great circle crosses the equator at 127W. It will also cross the equator at what other longitude?

430: The southeast trade winds actually blow toward the __________.

431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.

432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.

434: The purpose of the "set" hand on an aneroid barometer is to __________.

435: If an observer is at 35N latitude, his zenith is __________.

436: A wind vane on a moving vessel shows __________.

437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?

438: Your longitude is 124E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is __________.

439: If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere?

440: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T. The range appears as shown and is closing. Which action should you take? (D047NG )

441: A yellow buoy may exhibit a(n) __________.

442: In very high latitudes, the most practical chart projection is the __________.

444: A sylphon cell is a part of a __________.

445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.

446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.

447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?

448: Mean high water is the reference datum used to measure __________.

449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063T, and bears 136T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?

450: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

451: Which light characteristic may be used on a special purpose mark?

452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.

454: On what does the operation of an aneroid barometer depend?

455: The height of eye correction is smaller than geometrical dip because of __________.

456: Which condition exists in the eye of a hurricane?

457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4).

458: The prevailing westerlies of the Southern Hemisphere blow 18-30 knots __________.

459: A buoy bears 178T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to port?

460: When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?

461: Under the U.S. Aids to Navigation System, a yellow buoy may __________.

462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?

464: Prior to reading an aneroid barometer, you should tap the face lightly with your finger to __________.

465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.

466: In the relatively calm area near the hurricane center, the seas are __________.

467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet?

468: Which of the symbols shown represents a cold front? (D018NG )

469: Where are the prevailing westerlies of the Southern Hemisphere located?

470: You are underway on course 120T and can make 12 knots. The eye of a hurricane bears 150T at 120 miles. The hurricane is on course 295 at 20 knots. What course should you steer at 12 knots to have the maximum CPA?

471: Yellow lights may appear on __________.

472: Which conic projection chart features straight lines which closely approximate a great circle?

474: Which indication on the barometer is most meaningful in forecasting weather?

475: A correction for augmentation is included in the Nautical Almanac corrections for __________.

476: Tropical cyclones normally form within which of the following belts of latitude?

477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983.

478: The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.

479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063T, and bears 136T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?

481: A special mark (yellow buoy), if lighted, may exhibit which light rhythm?

482: Which statement about a gnomonic chart is correct?

483: Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets due to __________.

484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.

485: A phase correction is applied to observations of __________.

486: Tropical cyclones do not form within 5 of the Equator because __________.

487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)?

488: A great circle crosses the equator at 93W. It will also cross the equator at what other longitude?

489: You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?

490: You are underway on course 050T and your maximum speed is 10 knots. The eye of a hurricane bears 100T, 90 miles from your position. The hurricane is moving towards 285T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?

491: A special purpose buoy shall be __________.

492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth?

493: The picture shown represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

494: Aneroid barometers are usually calibrated to indicate atmospheric pressure in __________.

495: A semidiameter correction is applied to observations of __________.

496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.

497: What will be the time after 0300 (ZD +4), on 5 March 1983, when the height of the tide at Port of Spain, Trinidad, will be 2.5 feet (.76 meters) ?

498: What is an advantage of the magnetic compass aboard vessels?

499: Which of the symbols shown represents an occluded front? (D018NG )

500: The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of __________.

501: Which of the buoys listed below could be used to mark an anchorage?

502: A gnomonic projection is based on a(n) __________.

503: You are approaching a light fitted with a RACON. The light may be identified on the radar by __________.

504: Barometer readings in weather reports are given in terms of pressure at __________.

505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the __________.

506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?

507: What will be the time after 1000 EST (ZD +5), on 4 March 1983, that the height of the tide at City Island, NY, will be 2.4 feet?

508: Which statement about the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.

510: Which aid is NOT marked on a chart with a magenta circle?

511: A survey (special purpose mark) buoy __________.

512: On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.

513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )

514: What instrument measures wind velocity?

515: The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.

516: A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT __________.

517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?

518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.

519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?

520: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

521: Which sextant has an index error of 2'10" on the arc? (D050NG )

522: All straight lines represent great circle tracks on a chart based on a(n) __________.

523: A radar display in which North is always at the top of the screen is a(n) __________.

524: An anemometer on a moving vessel measures __________.

525: In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?

526: When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.

527: On 6 June 1983, at 1719 EST (ZD +5), what will be the predicted height of tide at Chester, PA?

528: What should you expect when you encounter a tsunami in the open ocean?

529: In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream, and is called a __________.

530: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

531: You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?

532: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

533: You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0. If bearings are measured in relation to the flash, what type of bearings are produced?

534: What is TRUE concerning an anemometer on a moving vessel?

535: The tropical year differs from which year by 20 minutes?

536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.

537: What will be the height of tide at Gargathy Neck, VA, at 1800 DST (ZD +4), on 16 August 1983?

538: Which symbol shown represents a stationary front? (D018NG )

539: You are underway on course 050T and your maximum speed is 13 knots. The eye of a hurricane bears 120T, 100 miles from your position. The hurricane is moving towards 265T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?

540: A white buoy with an orange rectangle on it is used to indicate __________.

541: A yellow buoy may mark a(n) __________.

542: The only cylindrical chart projection widely used for navigation is the __________.

543: A radar display which is oriented, so that north is always at the top of the screen, is called a(n) __________.

544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.

545: The arc of a great circle which passes through the body and celestial poles is part of the __________. (D007NG )

546: If it is impossible to avoid a hurricane in the Northern Hemisphere, the most favorable place to be when the storm passes is in __________.

547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?

548: When the declination of the Moon is 012.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

549: On a working copy of a weather map, an occluded front is represented by which color line?

550: The description "Racon" beside an illustration on a chart would mean a __________.

551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?

552: A Mercator chart is a __________.

553: The beam width of your radar is 2. The left tangent bearing of a small island, as observed on the PPI scope, is 056pgc. If the gyro error is 2E, what bearing would you plot on the chart?

554: A sling psychrometer is a(n) __________.

555: The letter D shown represents the __________. (D006NG )

556: In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be __________.

557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?

558: A buoy bears 176T at 3000 yards. What is the course to make good to leave the buoy 100 yards to starboard?

559: A great circle crosses the equator at 162E. It will also cross the equator at what other longitude?

560: On 14 April 1981, a back sight is observed of the lower limb of the Sun. The height of eye is 45 feet. The index error is 2.5' on the arc. The sextant altitude (hs) is 11714.6'. What is the observed altitude (Ho)?

561: Buoys which mark dredging areas are painted __________.

562: You wish to measure the distance on a Mercator chart between a point in latitude 4230'N and a point in latitude 4030'N. To measure 30 miles at a time you should set the points of the dividers at __________.

563: Your radar has a beam width of 2. The radar gyro bearing of the right tangent of an island is 316. The gyro error is 1E. Which true bearing should be plotted on the chart?

564: A hygrometer is a device used for determining __________.

565: The letter B as shown represents the __________. (D006NG )

566: You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most likely __________.

568: The chart of a beach area shows a very steep slope to the underwater beach bottom. Which type of breakers can be expected when trying to land a boat on this beach?

569: A line of position formed by sighting two charted objects in line is called a(n) __________.

570: Chart legends printed in capital letters show that the associated landmark is __________.

571: The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. The buoys marking this exclusion area will be __________.

572: You wish to measure the distance on a Mercator chart between a point in latitude 4330'N and a point in latitude 4030'N. To measure 30 miles at a time, you should set the points of the dividers at __________.

573: What is the name of the movable, radial guide line used to measure direction on a radar?

574: If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56F (13C), what is the correct reading at 55N, 150W?

575: The horizontal plane, perpendicular to the zenith-nadir axis, that intersects with the celestial sphere and is tangent to the earth is called the __________.

577: Your vessel has a draft of 24 feet. On 7 April 1983 you wish to pass over a temporary obstruction near Lovell Island, MA, that has a charted depth of 22 feet. Allowing for a safety margin of 3.1 feet under your keel, what is the earliest time after 0100 EST (ZD +5) that this passage can be made?

578: At about GMT 1436, on 3 December 1981, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 338.8'. What is the observed altitude?

579: Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.

580: On 21 January 1981, you observe a back sight of the Sun's lower limb. The sextant altitude (hs) is 12131.5'. The index error is 2.5' on the arc. The height of eye is 31 feet (9.3 meters). What is the observed altitude (Ho)?

581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.

582: Distance along a track line is measured on a Mercator chart by using the __________.

583: The radar control used to reduce sea return at close ranges is the __________.

584: The correction(s) which must be applied to an aneroid barometer reading include(s) __________.

585: What great circle is always needed to form the astronomical triangle?

586: The approximate distance to a storm center can be determined by noting the hourly rate of fall of the barometer. If the rate of fall is 0.08 - 0.12 inches, what is the approximate distance to the storm center?

587: Your vessel has a draft of 34 feet. On 8 October 1983 you wish to pass over an obstruction near Jaffrey Point, NH, that has a charted depth of 31 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 0900 DST (ZD +4) that this passage can be made?

588: You are underway on course 050T and your maximum speed is 10 knots. The eye of a hurricane bears 100T, 90 miles from your position. The hurricane is moving towards 285T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?

589: What is the index error of sextant D? (D050NG )

590: On 16 January 1981, you take a sight of a star. The sextant altitude (hs) is 433.0'. The temperature is -10C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?

591: White lights may be found on __________.

592: To measure distance on a Mercator chart between the parallels of LAT 3430'N and LAT 3130'N, which 30 mile scale should be used?

593: Radar makes the most accurate determination of the __________.

594: Barometers are calibrated at a standard temperature of __________.

595: In the navigational triangle, the angle at the elevated pole is the __________.

596: Which condition would NOT indicate the approach of a tropical storm?

597: You will be loading in Boston Harbor to a maximum draft of 32'06". The charted depth of an obstruction in the channel near Boston Light is 30 feet and you wish to have 3 feet of keel clearance. The steaming time from the pier to the obstruction is 01h 05m. What is the latest time (ZD +4) you can sail on 17 May 1983 and meet these requirements?

598: A great circle crosses the equator at 141E. It will also cross the equator at what other longitude?

599: Magnetic compass deviation __________.

600: The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.

601: White and orange buoys, if lighted, show which color light?

602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?

603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?

604: Chronometer error may be found by __________.

605: Which is NOT a side of the celestial navigational triangle?

606: Early indications of the approach of a hurricane may be all of the following EXCEPT __________.

607: The charted depth alongside the south face of Mystic Pier, Charlestown, MA, is 35 feet. Your maximum draft is 38 feet. You wish to have 2 feet under the bottom, on a rising tide, when you go alongside to discharge a heavy lift. What is the earliest time after 0900 EST (ZD +5), on 2 February 1983, that you can dock?

608: In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?

609: A tropical wave is located 200 miles due west of your position, which is north of the equator. Where will the wave be in 24 hours?

610: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true wind __________.

611: Information markers, when lighted, will display __________.

612: Which statement is TRUE concerning a Mercator projection?

613: Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.

614: A marine chronometer should be rewound once every __________.

615: The spinning motion of a planet around its axis is called __________.

617: You are bound for the Chelsea docks in the Hudson River. The Captain wants to arrive at the docks at the first slack water on 28 July 1983. You are keeping daylight saving time. What time should you be at the docks?

619: According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, the center of the low pressure is located to the __________.

620: Chart legends which indicate a conspicuous landmark are printed in __________.

621: Navigational marks used for informational or regulatory purposes are __________.

622: The scale of a Mercator projection is 4 inches equals 1LONG. What is the expansion in inches between the 60th and 61st parallels?

623: An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?

623: An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?

624: When using a mechanical (windup type) marine chronometer, how often should it be reset?

625: The center of a circle of equal altitude, plotted on the surface of the Earth, is the __________.

626: What indicates the arrival of a hurricane within 24 to 36 hours?

627: You are on a coastwise voyage bound for Marcus Hook, PA. Your speed is 15 knots. You wish to use the flood tide to facilitate docking starboard side to, heading seaward. To have the most favorable tide throughout, you should time your arrival at the entrance to Delaware Bay __________.

629: The rise and fall of the ocean's surface due to a distant storm is known as __________.

630: What kind of weather would you expect to accompany the passage of a tropical wave?

631: A light characteristic of composite group flashing indicates that there is a(n) __________.

632: You must construct a Mercator projection for an area bounded by latitudes 40 - 47N and longitudes 176E to 176W on a paper 28 X 36 inches. Allow a neat line of one inch. What will be the separation between meridians?

633: You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090 relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called __________.

634: What will cause the ARPA to emit a visual alarm, audible alarm, or both?

635: A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.

636: Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?

637: Your draft is 24 feet. You wish to pass over an obstruction near Lovell Island, MA, on 6 May 1983. The charted depth is 22 feet. Allowing a safety margin of 3.0 feet, what is the earliest time after 0200 DST (ZD +4) that this passage can be made?

638: Swell is the rise and fall of the ocean's surface due to __________.

639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?

641: Buoys which mark isolated dangers are painted with alternating _____________ .

642: Which government agency publishes the U.S. Coast Pilot?

643: When using the radar for navigating __________.

644: Your ARPA has been tracking a target and has generated the targets course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?

645: The arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90, is the __________.

646: You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?

647: You will enter Argentia, Newfoundland, at 1200 on 5 October 1983, while keeping zone description +3 on the ship's clocks. What will be the height of tide at this time (based on the Canadian chart datum)?

648: Weather systems in the middle latitudes generally travel from __________.

649: You are on course 226T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?

650: What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?

651: Which topmark shown identifies an isolated danger? (D023NG )

652: What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?

653: You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?

654: Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?

655: The equator is __________.

656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.

657: Current refers to the __________.

658: Monsoons are characterized by __________.

660: What is the length of a nautical mile?

661: Under the IALA Buoyage Systems, safe water marks may show a __________.

662: What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions?

663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.

664: Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel?

665: 17 degrees of latitude is equal to __________.

666: In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. The best course of action is to bring the wind on the __________.

667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.

668: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133T, and bears 042 at 105 miles from you. What is the course to steer at 10 knots to intercept vessel A?

669: It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at least every __________.

670: A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE?

671: You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a __________.

672: You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?

673: You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later, the contact is 8 miles directly astern of you. What is the estimated speed of the contact?

674: When using an ARPA, what should you consider in order to evaluate the information displayed?

675: 15 of latitude is equal to __________.

676: If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, you should bring the wind __________.

677: A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in height of tide at the two ends of the passage, is called a __________.

678: On 25 December 1981 you observe the Sun's lower limb. The sextant altitude (hs) is 406.9'. The height of eye is 47 feet and the index error is 1.6' on the arc. The temperature is 19F. and the barometer reads 1030.8 millibars. What is the observed altitude (Ho)?

679: A tropical wave is usually preceded by __________.

680: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

681: You sight a spar buoy with the top mark shown in the illustration. You must __________. (D027NG )

682: Which table is NOT found in the U.S. Coast Pilots?

683: A radar contact will remain stationary on a relative motion radar display only when it is __________.

684: The ARPA may swap targets when automatically tracking if two targets __________.

685: Thirty-two meters equals __________.

686: The pressure gradient between the horse latitudes and doldrums runs __________.

687: The drift and set of tidal, river, and ocean currents refer to the __________.

688: In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?

689: What is the index error of sextant C? (D050NG )

690: What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?

691: Of the four light characteristics shown which one does NOT represent a safe water mark of the IALA Buoyage System? (D019NG )

692: Which publication should you check for complete information on Puget Sound weather conditions?

693: Which general statement concerning radar is FALSE?

694: Your ARPA has two guard zones. What is the purpose of the inner guard zone?

695: An azimuth angle for a body is measured from the __________.

696: The diurnal pressure variation is most noticeable in the __________.

697: The set of the current is the __________.

698: You are in LONG 165E, zone time at 0400, 1 November 1981. What is the zone time and date in LONG 165W?

700: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

701: In the IALA Buoyage System, buoys with alternating red and green horizontal bands are used to indicate __________.

702: Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay?

703: Which statement concerning the operation of radar in fog is TRUE?

704: What is TRUE of the history display of a target's past positions on an ARPA?

705: The precession of the equinoxes occurs in a(n) __________.

706: A steep barometric gradient indicates __________.

706: A steep barometric gradient indicates __________.

707: Set of the current is __________.

708: Which statement about Radio Navigational Warning Broadcasts is TRUE?

709: A sea breeze is a wind __________.

710: What is the FIRST sign of the existence of a well developed tropical cyclone?

711: In the IALA Maritime Buoyage System, a red and white vertically-striped buoy is used as a(n) __________.

712: Information about the pilotage available at Miami harbor may best be obtained from which publication?

713: The closest point of approach (CPA) of a contact on a relative motion radar may be determined __________.

713: The closest point of approach (CPA) of a contact on a relative motion radar may be determined __________.

714: When using the ARPA in heavy rain, which action should you take?

715: The length of the year with respect to the vernal equinox is the __________.

716: Standard atmospheric pressure in inches of mercury is __________.

717: Which term refers to the direction a current is flowing?

718: You are to sail from Elizabethport, NJ, on 22 May 1983 with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 27 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD +4) you can sail on the afternoon of 22 May and pass over the obstruction with 3 feet of clearance?

719: You are on course 209T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?

719: You are on course 209T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?

720: Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location?

721: Under the IALA Buoyage System, a red and white vertically-striped buoy would NOT indicate __________.

722: Which publication would describe the explosive anchorages in the ports on the east coast of the United States?

723: If there is any doubt as to the proper operation of a radar, which statement is TRUE?

724: Which statement concerning GPS is TRUE?

725: The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.

726: Atmospheric pressure at sea level is equal to __________.

727: What is an ebb current?

728: In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 0335.5'. Your height of eye is 32 feet and there is no index error. The air temperature is -10C and the barometer reads 1010 millibars. What is the observed altitude (Ho)?

729: The doldrums are characterized by __________.

730: In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located __________.

731: Under the IALA Buoyage Systems, a vertically-striped buoy may be striped red and __________.

732: What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?

733: What would give the best radar echo?

734: You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?

735: The period of the Earth's revolution from perihelion to perihelion is the __________.

736: A line on a weather chart connecting places which have the same barometric pressure is called an __________.

737: What describes an ebb current?

738: Most GPS receivers use the Doppler shift of the carrier phase to compute __________.

739: The upper vertex of a great circle track is in LONG 15600'E. Sailing eastward, the great circle track will cross the equator in LONG __________.

740: A very light breeze that causes ripples on a small area of still water is a __________.

741: What is the light phase characteristic of a lighted isolated-danger mark?

742: You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________.

744: A hand held instrument used to measure distances between objects and the ship is a __________.

745: Retrograde motion is the __________.

746: Lines drawn through points on the Earth having the same atmospheric pressure are known as __________.

747: The movement of water away from the shore or downstream is called a(n) __________.

748: You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies __________.

749: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233T, and bears 264T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?

750: On a working copy of a weather map, a cold front is represented by what color line?

751: Under the IALA Buoyage Systems, a yellow buoy may mark __________.

752: Which publication would NOT be used on a voyage from Houston to New York?

754: Deviation in a compass is caused by the __________.

755: The sidereal day begins when the __________.

756: What is a common unit of measure for atmospheric pressure?

757: The term "flood current" refers to that time when the water __________.

757: The term "flood current" refers to that time when the water __________.

759: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile west of your DR. Which statement is TRUE?

760: As a vessel changes course to starboard, the compass card in a magnetic compass __________.

761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.

762: Chart correction information is NOT disseminated through the __________.

763: Time signals broadcast by WWV and WWVH are transmitted __________.

764: Magnetic variation changes with a change in __________.

765: Diurnal aberration is due to __________.

766: Which position includes the effects of wind and current?

767: What describes a flood current?

768: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

769: What does not contribute to the commercial GPS receiver position error?

770: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

771: Under the IALA Buoyage Systems, a spherical buoy will mark the __________.

772: You are hove to in a hurricane on a heading of 328T. The wind is from 030 true at 119 knots. How should this be encoded on the weather report form under Nddff. (D041NG )

773: What is the basic principle of the magnetic compass?

774: Variation is not constant; it is different with every change in __________.

775: A sidereal day is shorter than a solar day. This difference is due to __________.

776: You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.

777: With respect to a reversing current, slack water occurs when there is __________.

778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.

779: Which sextant shown has an index error of 0'20" on the arc? (D050NG )

779: Which sextant shown has an index error of 0'20" on the arc? (D050NG )

780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.

781: The IALA Buoyage Systems do NOT apply to __________.

782: Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of __________.

783: Magnetism which is present only when the material is under the influence of an external field is called __________.

784: Variation is the angular measurement between __________.

785: An amplitude of the Sun in high latitudes __________.

786: The greater the pressure difference between a high and a low pressure center, the __________.

786: The greater the pressure difference between a high and a low pressure center, the __________.

787: You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you navigate __________.

789: The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.

791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.

792: Information about temporary, short term changes affecting the safety of navigation in U.S. waters is distributed to navigational interests by the __________.

793: The permanent magnetism of a vessel may change in strength due to __________.

795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.

796: Cyclones tend to move __________.

797: Which statement is TRUE concerning the current of the Gulf Stream?

798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.

798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.

799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.

800: You are to sail from Elizabethport, NJ, on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 26 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?

801: You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?

802: Which is a weekly publication advising mariners of important matters affecting navigational safety?

803: Which buoy will NOT display white retroreflective material?

804: A relative bearing is always measured from __________.

805: If the right ascension of a body is 9 hours, it also __________.

806: Temperature and moisture characteristics are modified in a warm or cold air mass due to __________.

807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.

808: On a working copy of a weather map, a stationary front is represented by which color line?

809: The compass rose on a nautical chart indicates both variation and __________.

810: The position labeled B is a(n) __________. (D051NG )

811: Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.

812: You are informed of defects or changes in aids to navigation by __________.

813: At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.

814: Steam smoke will occur when __________.

815: When entering from seaward, a buoy displaying a composite group (2+1) flashing red light indicates __________.

816: Cyclones that have warm sectors usually move __________.

817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?

818: Ocean swells originating from a typhoon can move ahead of it at speeds near __________.

819: Which sextant has an index error of 4'20" off the arc? (D050NG )

820: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.

821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.

822: Charts should be corrected by using information published in the __________.

823: The greatest directive force is exerted on the magnetic compass when the __________.

824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?

825: While steering a course of 150T, you wish to observe the Sun for a speed check. What would the azimuth have to be?

826: In the U.S., in which direction do air masses usually move?

827: The Benguela Current flows in a __________.

828: The true wind has been determined to be from 210T, speed 12 knots. You desire the apparent wind to be 30 knots from 10 on the port bow. What course must you steer, and what speed must you make for this to occur?

829: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

830: The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during __________.

831: Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may have a __________.

832: What is the most important source of information to be used in correcting charts and keeping them up to date?

833: The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the __________.

834: In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. These are the result of __________.

835: When taking stars, those bodies to the east and west will __________.

836: In North America the majority of the weather systems move from __________.

837: The Brazil Current flows in which general direction?

838: A navigator fixing a vessel's position by radar __________.

839: When using a radar in an unstabilized mode, fixes are determined most easily from __________.

840: Which position includes the effects of wind and current?

841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.

842: Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.

843: The line which connects the points of zero magnetic dip is __________.

844: A cloud of marked vertical development (often anvil-shaped) would be classified as __________.

845: During one synodic rotation, a body makes one complete turn relative to the __________.

846: Weather systems in the middle latitudes generally travel from __________.

847: On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.

848: It is unlawful to approach within how many yards of a northern right whale?

849: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?

850: When is the peak of the hurricane season in the western North Pacific?

851: You would expect to find channels marked with the IALA-A Buoyage System in __________.

852: What is published by the U.S. Coast Guard?

853: The standard magnetic compass heading differs from the true heading by __________.

854: The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?

855: Which condition exists at the summer solstice in the Northern Hemisphere?

856: The flow of air around an anticyclone in the Southern Hemisphere is __________.

857: The current that, in many respects, is similar to the Gulf Stream is the __________.

858: Your ship is proceeding on course 320T at a speed of 25 knots. The apparent wind is from 30 off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?

859: At 1800 ZT on 31 October, your position is LAT 2450'N, LONG 9237'W. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

860: The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6 meters). Your height of eye is 52 feet (15.8 ,meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light?

861: You would expect to find channels marked with the IALA-A Buoyage System in __________.

862: The U.S. Coast Guard publishes __________.

863: The compass heading of a vessel differs from the true heading by __________.

864: Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________.

865: The radius of a circle of equal altitude of a body is equal to the __________.

866: Anticyclones are usually characterized by __________.

867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?

868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?

869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.

870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.

871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.

872: Which agency publishes the Light Lists?

873: Compass error is equal to the __________.

874: Altocumulus clouds are defined as __________.

875: Sidereal hour angle is always __________.

876: A generally circular low pressure area is called a(n) __________.

877: Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the __________.

878: At 0600 ZT on 31 January, your position is LAT 0049'S, LONG 8427'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

879: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233T, and bears 346T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?

880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

881: Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have a __________.

882: Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?

883: When changing from a compass course to a true course you should apply __________.

884: Which cloud type is normally associated with thunderstorms?

885: The daily path of a celestial body that is parallel to the celestial equator is the __________.

886: The circulation around a low pressure center in the Northern Hemisphere is __________.

887: Which current would you encounter on a direct passage from southern Africa to Argentina, South America?

888: Recurvature of a hurricane's track usually results in the forward speed __________.

889: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?

890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?

891: Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.

892: When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?

893: One point of a compass is equal to how many degrees?

894: On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________.

895: The ecliptic is __________.

896: The wind direction around a low pressure area in the Northern Hemisphere is __________.

897: What current flows southward along the west coast of the United States and causes extensive fog in that area?

898: At 1200 ZT, on 31 July, your position is LAT 2433'N, LONG 17305'W. You are preparing a weather report form, WS Form, B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

899: A latitude line will be obtained by observing a body __________.

900: An orange and white buoy with a rectangle on it is a(n) __________.

901: Under the IALA-A Buoyage System, a buoy indicating that the preferred channel is to port when entering from seaward, can have a __________.

903: Eight points of a compass are equal to how many degrees?

904: All of the following are associated with cumulonimbus clouds EXCEPT __________.

905: The Sun's center is coincident with the principal vertical circle when __________.

906: In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.

907: In which month will the equatorial counter current be strongest?

908: From LAT 0712'N, LONG 8000'W, to LAT 4712'S, LONG 16918'E, the initial great circle course angle is 137.25. How would you name this course?

909: What is the average speed of movement of a hurricane prior to recurvature?

910: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?

911: Under the IALA-B Buoyage System, a buoy displaying a red light will __________.

912: The Light List Does NOT contain information on __________.

913: How many points are there in a compass card?

914: If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.

915: The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

916: Stormy weather is usually associated with regions of __________.

917: As the South Equatorial Current approaches the east coast of Africa, it divides with the main part flowing south to form the warm __________.

918: At 1200 ZT, on 31 August, your position is LAT 4314'S, LONG 17544'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

919: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

920: What is the average speed of the movement of a hurricane following the recurvature of its track?

921: Under the IALA-B Buoyage System, a conical buoy will be __________.

922: How is the intensity of a light expressed in the Light Lists?

923: A magnetic compass card is marked in how many degrees?

924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.

925: Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming your vessel's location is still at the equator?

926: When a low pressure area is approaching, the weather generally __________.

927: The set of the equatorial countercurrent is generally to the __________.

928: The position labeled "D" was plotted because __________. (D051NG )

929: Which error is NOT included in the term "current" when used in relation to a fix?

929: Which error is NOT included in the term "current" when used in relation to a fix?

930: Which statement about radio navigational warnings is TRUE?

931: Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be __________.

932: To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________.

933: How many degrees are there on a compass card?

934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.

935: The Light List shows that a navigational light has a nominal range of 5 miles and a height above water of 21 feet (6.4 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 1.0 mile. At what approximate range will you first sight the light?

936: A cyclone in its final stage of development is called a(n) __________.

937: The north equatorial current flows to the __________.

938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.

939: That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the __________.

940: What is the length of a nautical mile?

941: While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take?

942: Light Lists for coastal waters are __________.

943: You should plot your dead reckoning position __________.

944: High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky", would be classified as __________.

945: What is NOT a side of the navigational triangle used in sight reduction?

946: The wind circulation around a high pressure center in the Northern Hemisphere is __________.

947: The cold ocean current which meets the warm Gulf Stream between latitudes 40 and 43N to form the "cold wall" is called the __________.

949: In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

950: Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?

951: In which country would you expect the channels to be marked with the IALA-B Buoyage System?

952: What is TRUE concerning new editions of Light Lists?

953: The magnetic compass operates on the principle that __________.

954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.

955: The line of position determined from a sight with an observed altitude (Ho) of 8845.0' should be __________.

956: Good weather is usually associated with a region of __________.

957: The Humboldt Current flows in which direction?

958: You are preparing a weather report form. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062 relative at 13 knots. You are on course 238T at 22 knots. How should you encode group Nddff? (D041NG )

959: What is the index error of sextant B in illustration D050NG? (D050NG )

960: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 29 feet (8.8 meters). Your height of eye is 52 feet (15.8 meters) and visibility is 6.0 miles. At which approximate range will you first sight the light?

961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?

961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?

962: Chart legends which indicate a conspicuous landmark are printed in __________.

963: To center a compass bowl in its binnacle, you should have the ship on an even keel, heading north or south, and adjust the screws until __________.

964: The thin, whitish, high clouds composed of ice crystals, popularly known as "mares' tails" are __________.

965: In order for a star to be used for a sight at lower transit, the star must __________.

966: Most high pressure areas in the United States are accompanied by __________.

967: On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.

968: The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?

968: The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?

969: The population of northern right whales, an endangered species, numbers approximately __________.

969: The population of northern right whales, an endangered species, numbers approximately __________.

970: You are preparing a weather report form, WS Form B-80. The sky is overcast, and the anemometer indicates that the apparent wind is from 144 relative at 8 knots. You are on course 162T at 15 knots. How should you encode group Nddff? (D041NG )

971: You are in British waters on course 090T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________.

972: In which source could you find the number of a chart for a certain geographic area?

973: The heading of a vessel is indicated by what part of the compass?

974: Which cloud commonly produces a halo about the Sun or Moon?

975: The change in the length of the day becomes greater as latitude increases because of the __________.

976: The atmosphere in the vicinity of a high pressure area is called a(n) __________.

977: In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.

978: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

979: Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?

980: When the declination of the Moon is 012.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

981: The characteristic of a lighted cardinal mark may be __________.

983: Error may be introduced into a magnetic compass by __________.

984: The bases of middle clouds are located at altitudes of between __________.

985: A time diagram is a diagram on the plane of the __________.

986: A warm air mass is characterized by __________.

987: Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?

988: You are preparing a weather report form, WS Form B-80. One-half of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 340 relative at 14 knots. You are on course 307T at 12.6 knots. How should you encode group Nddff? (D041NG )

989: The Light List shows that a navigational light has a nominal range of 18 miles and a height above water of 22 feet (6.7 meters). Your height of eye is 16 feet (4.9 meters) and the visibility is 2.0 miles. At which approximate range will you first sight the light?

990: You plot a fix using three lines of position and find they intersect in a triangle. You should plot the position of the vessel __________.

991: You are underway in the North Sea on course 328T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________.

992: Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?

993: When crossing the magnetic equator the __________.

994: Which list of clouds is in sequence, from highest to lowest in the sky?

995: What is the equivalent of 8329.6' in time units?

996: Warm air masses will generally have __________.

997: A coastal current __________.

998: The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?

999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226 relative at 17.7 knots. You are on course 020T at 8 knots. How should you encode group Nddff? (D041NG )

1000: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T. The range appears as shown and is closing. Which action should you take? (D047NG )

1001: While steaming in English waters on course 280T, you sight a buoy showing a very quick-flashing (VQ) white light well to port. Maintaining course, you sight another buoy showing a quick-flashing (Q) white light. You should pass __________.

1002: What publication contains information about the port facilities in Cadiz, Spain?

1003: The quadrantal spheres are used to __________.

1004: A low, uniform layer of cloud resembling fog, but not resting on the ground, is called __________.

1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50F (10C) and atmospheric pressure of __________.

1006: An air mass is termed "warm" if __________.

1007: When a current flows in the opposite direction to the waves, the wave __________.

1008: The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?

1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34F, and the wet bulb thermometer reads 31F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )

1010: What is a characteristic of a rhumb line?

1011: You are underway in the North Sea on course 127T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )

1012: General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?

1013: The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

1014: Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.

1015: Which statement about the time diagram shown is correct? (D005NG )

1016: A source of an air mass labeled mTw is __________.

1017: Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?

1018: An aneroid barometer reading should be corrected for differences in __________.

1019: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 30F (-1), and the wet bulb thermometer reads 28F (-2C). Using the Ships Code Card, how would you encode the air temperature groups in the report? (D041NG )

1020: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?

1021: You are underway in the North Sea on course 142T when you sight a buoy bearing 105T. The buoy's white light has a characteristic of continuous very-quick flashing. To ensure that your vessel remains in the best navigable water you would __________.

1022: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1023: Which compensates for induced magnetism in the horizontal soft iron of a vessel?

1024: The dew point is reached when the __________.

1025: A first magnitude star is __________.

1026: An air mass that has moved down from Canada would most likely have the symbols __________.

1027: In the Northern Hemisphere the major ocean currents tend to flow __________.

1028: At what angle to the isobars do surface winds blow over the open sea?

1029: Which would be the subject of a NAVAREA warning?

1030: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 78F, and the wet bulb thermometer reads 75F. How would you encode the air temperature groups in the report? (D041NG )

1031: While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG. How would you pass this buoy? (D028NG )

1032: What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.

1034: The expression "the air is saturated" means __________.

1035: The approximate positions of the stars are based on sidereal time, which is based upon rotation of the Earth relative to __________.

1036: A frontal thunderstorm is caused by __________.

1037: Generally speaking, a ship steaming across the North Pacific from Japan to Seattle is likely to experience __________.

1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54F, and the wet bulb thermometer reads 50F. How would you encode the air temperature groups in the report? (D041NG )

1039: While taking weather observations, you determine that the wind is coming from the west. In the weather log, you would record the wind direction as __________.

1040: An occluded front is usually caused by a __________.

1041: You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white flashing light showing a group of two flashes. The buoy indicates you __________.

1042: What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1043: You are about to go to sea and adjust the magnetic compass. To expedite the adjustment at sea, in what order should the following dockside adjustments be made?

1044: The dry-bulb temperature is 78F and the wet-bulb temperature is 62F. What is the relative humidity?

1045: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?

1046: The probability of a sudden wind may be foretold by __________.

1047: Which is NOT a contributing cause of ocean currents?

1047: Which is NOT a contributing cause of ocean currents?

1048: The velocity of the current in large coastal harbors is __________.

1049: At 0000 you fix your position and change course to 270T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?

1050: The passing of a low pressure system can be determined by periodically checking the __________.

1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.

1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1053: Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the __________.

1054: The dry-bulb temperature is 78F (26C) and the wet-bulb temperature is 68F (20C). What is the relative humidity?

1055: The radius of a circle of equal altitude for a body equals the body's __________.

1056: The steepness of a cold front depends on __________.

1057: One of the causes of ocean currents is density differences in the water. This is true because __________.

1058: You are preparing a weather report form, WS Form B-80. Your position is LAT 6442'N, LONG 0228'W. How would this be encoded? (D041NG )

1059: The Light List shows that a navigational light has a nominal range of 17 miles and a height above water of 28 feet (8.5 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 11.0 miles. At what approximate range will you first sight the light?

1060: Isobars on a weather map are useful in predicting __________.

1061: In waters where the cardinal system is used you would expect to find danger __________.

1062: What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1063: When adjusting a magnetic compass using the fore-and-aft permanent magnets, you should __________.

1064: The dew point temperature is __________.

1065: You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?

1066: The slope of a warm front is about __________.

1067: The two most effective generating forces of surface ocean currents are __________.

1068: A vessel sighting a northern right whale dead ahead should __________.

1069: What do the numbers on isobars indicate?

1070: Chart legends which indicate a conspicuous landmark are printed in __________.

1071: A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the __________.

1072: What is the approximate geographic range of Assateague Light, VA, if your height of eye is 52 feet (15.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1073: Chart legends printed in capital letters show that the associated landmark is __________.

1074: As the temperature for a given mass of air increases, the __________.

1075: The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.

1076: Which is TRUE concerning the speed of fronts?

1076: Which is TRUE concerning the speed of fronts?

1077: A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing, the water of __________.

1078: The description "Racon" beside an illustration on a chart would mean a __________.

1080: Information on northern right whales can be found in __________.

1081: On a voyage along the coast of France, you sight a buoy with the top marks as shown. You are required to steer __________. (D026NG )

1082: Northern right whales can be identified by __________.

1083: Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________.

1084: As the temperature of an air mass decreases, the __________.

1085: A chart position enclosed by a semi-circle is a(n) __________.

1086: When crossing a front isobars tend to __________.

1087: The velocity of a rotary tidal current will increase when the Moon is __________.

1088: Which statement about an estimated position is TRUE?

1089: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033T, and bears 248T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?

1090: What weather conditions would you expect to find at position A? (D049NG )

1091: The cardinal mark topmark shown in illustration D024NG represents which quadrant? (D024NG )

1092: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

1093: The Flinders bar on a magnetic compass compensates for the __________.

1094: A light, feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form, on objects whose temperatures are below freezing, is called __________.

1095: The celestial coordinate of a star that is relatively constant in value is the __________.

1096: With the passage of an occluded front the temperature __________.

1097: The velocity of a rotary tidal current will be decreased when the Moon is __________.

1098: A chart position enclosed by a square is a(n) __________.

1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133T, and bears 343T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?

1101: In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown will this buoy be fitted with under the IALA Buoyage system? (D031NG )

1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

1103: The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?

1104: Which condition(s) is(are) necessary for the formation of dew?

1105: The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?

1106: The legend/symbol which designates an occluded front is represented by a __________.

1108: Preferred channel buoys indicate the preferred channel to transit by __________.

1109: You are on course 146T. To check the speed of your vessel you should observe a celestial body on which bearing?

1110: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

1110: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

1111: Black double-cone topmarks are the most important feature, by day, of cardinal marks. Which of the four topmarks shown indicates the best navigable water lies to the west of the buoy? (D030NG )

1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30N and 60N is commonly called the __________.

1113: A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.

1114: Mechanical lifting of air by the upslope slant of the terrain is called __________.

1115: Which light characteristic may be used on a special purpose mark?

1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.

1118: When entering from seaward, a buoy displaying a single-flashing red light indicates __________.

1119: The position labeled "D" was plotted because __________. (D051NG )

1120: You are on course 042T. To check the course of your vessel you should observe a celestial body on which bearing?

1121: The articulated light is superior to other types of buoys because __________.

1122: A barometer showing falling pressure indicates the approach of a __________.

1123: What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?

1124: The region containing 3/4 of the mass of the atmosphere and the region to which are confined such phenomena as clouds, storms, precipitation and changing weather conditions is called __________.

1125: The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?

1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.

1127: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?

1129: The motion of celestial bodies relative to other celestial bodies is known as __________.

1130: During daylight savings time the meridian used for determining the time is located farther __________.

1131: On navigational aids, what does the light characteristic "Fl(2+1)" mean?

1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

1133: Which compensates for errors introduced when the vessel heels over?

1134: The Earth's irregular heating is caused by __________.

1135: A position on the Earth has a longitude of 7410'E. Its celestial counterpart would have a __________.

1136: When a warm air mass overtakes and replaces a cold air mass, the contact surface is called a(n) __________.

1137: When the declination of the Moon is 012.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

1138: On approaching the English Channel on course 080T, you note the symbol YBY near a charted buoy. You must pass __________.

1139: A star is observed at lower transit. The line of position derived from this sight is __________.

1140: What is the light characteristic of a lighted, preferred-channel buoy?

1141: What is characteristic of an isophase light?

1142: Which weather conditions would you expect to find 100 miles East of position "B"? (D049NG )

1144: Freezing salt water spray should be anticipated when the air temperature drops below what temperature?

1145: The GHA of a star __________.

1146: What is true about a front?

1147: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted time of the favorable current?

1148: The numeral in the center of a wind rose circle on a pilot chart indicates the __________.

1149: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights, as shown, on your starboard beam. You should __________. (D047NG )

1150: You are on course 312T. To check the speed of your vessel you should observe a celestial body on which bearing?

1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?

1152: When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.

1153: Heeling error is defined as the change of deviation for a heel of __________.

1154: The speed at which an ocean wave system advances is called __________.

1155: Which aid is NOT marked on a chart with a magenta circle?

1156: When cold air displaces warm air you have a(n) __________.

1157: How many slack tidal currents usually occur each day on the east coast of the United States?

1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )

1159: Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by __________.

1160: What will be the velocity of the tidal current at 0.2 mile SSW of Clason Point, NY, at 1125 on 17 April 1983?

1161: What is characteristic of an occulting light?

1162: A line connecting all possible positions of your vessel at any given time is a __________.

1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.

1164: The largest waves (heaviest chop) will usually develop where the wind blows __________.

1165: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

1166: A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.

1167: The velocity of the current in large coastal harbors is __________.

1168: Which type of cloud is indicated by the number 4? (D039NG )

1169: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "O" represents __________. (D042NG )

1170: Which statement concerning the illustration is correct? (Soundings and heights are in meters) (D010NG )

1171: A light that has a light period shorter than its dark period is described as __________.

1172: Which position shown would likely have stratus or stratocumulus clouds, occasional light drizzle, steady southerlies around 10 knots, and steady temperatures? (D049NG )

1173: When adjusting a magnetic compass for error, a deviation table should be made __________.

1174: Your vessel is enroute from Japan to Seattle and is located at position I on the weather map. You should experience which weather condition? (D013NG )

1175: Solid green arrows on the main body of a pilot chart indicate __________.

1176: After a cold front passes, the barometric pressure __________.

1177: The magnitude of three stars is indicated. Which star is the brightest?

1178: The range of tide is the __________.

1179: Which type of cloud is indicated by the number 3? (DO39NG )

1180: You are on course 238T. To check the course of your vessel you should observe a celestial body on which bearing?

1181: An occulting light is one in which __________.

1182: Referring to the illustration, which wind speed is reported in position C? (D049NG )

1183: The principal purpose of magnetic compass adjustment is to __________.

1183: The principal purpose of magnetic compass adjustment is to __________.

1184: Your position X is at LAT 35S. Which winds are you experiencing? (D009NG )

1185: An orange and white buoy with a rectangle on it displays __________.

1186: As a cold front passes an observer, pressure __________.

1187: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.

1188: The magnitude of three stars is indicated. Which star is the brightest?

1189: Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the ____________ .

1190: Which type of cloud is indicated by the number 2? (D039NG )

1191: You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.

1192: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033T, and bears 284T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?

1193: If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________.

1194: In the Northern Hemisphere, an observer at point II in the weather system should experience a wind shift from the __________. (D014NG )

1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

1196: In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________.

1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.

1198: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a dust storm? (D042NG )

1199: The Sailing Directions (Enroute) contain information on __________.

1200: You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which the current does not exceed 0.3 knot?

1201: What is NOT true concerning color sectors of lights?

1202: As shown in the illustration, which wind speeds are reported at position A? (D049NG )

1203: If the compass heading and the magnetic heading are the same then __________.

1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )

1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )

1205: How is the annual rate of change for magnetic variation shown on a pilot chart?

1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.

1207: What will be the velocity of the tidal current at New London Harbor Entrance, CT, at 1615 EST (ZD +5) on 26 December 1983?

1208: Which type of cloud is indicated by the number 1? (D039NG )

1209: You are on course 201T. To check the speed of your vessel you should observe a celestial body on which bearing?

1210: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

1211: Red sectors of navigation lights warn mariners of __________.

1213: If the magnetic heading is greater than the compass heading, the deviation is __________.

1214: The letter B in the diagram represents the __________. (D006NG )

1215: Daylight savings time is a form of zone time that adopts the time __________.

1216: In the Northern Hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a __________.

1217: What will be the velocity and direction of the tidal current at Old Ferry Point, NY, at 1340 EST (ZD +5) on 5 February 1983?

1219: Which sextant in illustration D043NG reads 2942.5'? (D043NG )

1220: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

1221: On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.

1222: On entering from seaward, a starboard side daymark will __________.

1223: The difference between magnetic heading and compass heading is called __________.

1224: NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the conversion table found __________.

1225: The term "Western Rivers," when it refers to regulations requiring towing vessels to carry navigational-safety equipment, charts or maps, and publications, includes the _____________ .

1226: Cumulonimbus clouds are most likely to accompany a(n) __________.

1227: What will be the direction and velocity of the tidal current at Provincetown Harbor, MA, at 1405 DST (ZD +4) on 5 May 1983?

1228: "An electronic or electric device that indicates the rate of turn of a vessel," defines a/an _____________ .

1229: The initial great circle course angle between LAT 2300'S, LONG 4200'W and LAT 3400'S, LONG 1800'E is 063.8. What is the true course?

1230: Weather forecast messages are usually __________.

1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?

1232: Entering from seaward, triangular-shaped daymarks are used to mark __________.

1233: Deviation is the angle between the __________.

1234: Which information does the outer ring of a compass rose on a nautical chart provide?

1235: Weather information provided by the National Weather Service (NWS) advisories should be used along with __________.

1236: After the passage of a cold front the visibility_______. _

1237: What will be the velocity of the tidal current at Port Royal, VA, at 1505 DST (ZD +4) on 4 June 1983?

1238: What will be the height of tide at Three Mile Harbor Entrance, Gardiners Bay, NY, at 0700 (ZD +5) on 14 Nov 1983?

1239: While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log as __________.

1240: Weather information is available from __________.

1241: Which picture shows a fixed and flashing light? (D034NG )

1242: Daymarks marking the starboard side of the channel when going towards the sea are __________.

1243: Magnetic heading differs from compass heading by __________.

1245: You can follow the approach of a dangerous cyclonic storm by inspecting __________.

1246: What weather change accompanies the passage of a cold front in the Northern Hemisphere?

1247: What is the predicted velocity of the tidal current 2 miles west of Southwest Ledge for 2330 DST (ZD +4) on 7 September 1983?

1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?

1249: What is the light characteristic of a lighted, preferred-channel buoy?

1250: Daylight savings time is a form of zone time that adopts the time __________.

1251: A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________.

1252: Port side daymarks may be __________.

1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.

1254: Lighted white and orange buoys must show which color light?

1255: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

1256: A cold front moving in from the northwest can produce __________.

1257: What will be the velocity of the tidal current 1.0 mile southwest of Lewis Pt., RI, at 1501 EST (ZD +5) on 4 April 1983?

1258: You should log all barometer readings taken at sea __________.

1259: General information on enroute weather and climate is found in __________.

1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?

1261: A light having characteristics which include color variations is defined as __________.

1262: A safe water daymark has what shape?

1263: The compass deviation changes as the vessel changes __________.

1265: When reporting wind direction, you should give the direction in __________.

1266: A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.

1267: What will be the velocity of the tidal current at Coxsackie, NY, at 0945 EST (ZD +5) on 11 March 1983?

1268: On a nautical chart, the inner ring of a compass rose indicates __________.

1269: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?

1271: Which word indicates color variation in the characteristics of a light?

1272: What are the colors of a mid-channel daymark?

1273: Deviation changes with a change in __________.

1274: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a sandstorm? (D042NG )

1275: How is variation indicated on a small-scale nautical chart?

1276: Which weather change accompanies the passage of a cold front in the Northern Hemisphere?

1277: The velocity and direction of the tidal current at Port Morris, NY, at 1135 DST (ZD +4) on 13 May 1983 will be __________.

1278: The difference between the heights of low and high tide is the __________.

1279: For 3 November 1983, at 0830 EST (ZD +5) at Catskill, NY, what is the predicted height of tide?

1280: A current perpendicular to a vessel's track has the greatest effect on the vessel's course made good __________.

1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.

1282: Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________.

1283: The error in a magnetic compass caused by the vessel's magnetism is called __________.

1284: The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.

1285: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033T, and bears 248T at 64 miles from you. What is the time to intercept if you make 13 knots?

1286: Which condition will occur after a cold front passes?

1287: What will be the velocity of the tidal current 4.5 miles east of Smith Point, VA, at 0630 DST (ZD +4) on 6 May 1983?

1288: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 2310 EST (ZD +5)?

1289: A body can only be observed at lower transit when __________.

1290: In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?

1291: The period of a lighted aid to navigation refers to the __________.

1292: A triangular daymark would be colored __________.

1293: Deviation is caused by __________.

1295: The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.

1296: After a cold front passes the barometric pressure usually __________.

1297: What will be the velocity of the tidal current at Bournedale, MA, at 1135 DST (ZD +4) on 3 May 1983?

1298: The vertex of a great circle track is in LONG 109E. An eastbound vessel would cross the equator in LONG __________.

1299: What will be the time (ZD +5) of the second high tide at Weymouth Fore River Bridge, MA, on 12 November 1983?

1300: You are approaching a sea buoy which emits a racon signal. This signal is triggered by which type of radar?

1301: The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

1302: What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?

1303: Compass deviation is caused by __________.

1304: The distance to the nearest vertex from any point on a great circle track cannot exceed __________.

1305: Complete information on weather broadcasts throughout the world is contained in __________.

1306: What type of clouds are associated with a cold front?

1307: What will be the velocity of the tidal current southwest of Hunts Point, NY, at 0932 EST (ZD +5) on 16 March 1983?

1308: On a voyage from Cape Town to London, the favorable ocean current off the coast of Africa is the __________.

1309: When recording the wind direction in the weather log, you would report the __________.

1310: An urgent marine storm warning message would be broadcast on __________.

1311: What is the characteristic of a quick light?

1312: Which factor(s) is/are used to develop the charted information of a lighthouse?

1313: Variation in a compass is caused by __________.

1314: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates hail? (D042NG )

1315: What is a lighted safe water mark fitted with to aid in its identification?

1316: When a warm air mass overtakes a cold air mass, the contact surface is called a __________.

1317: What will be the velocity and direction of the tidal current at Mobile River Entrance, AL, at 0915 CDT (ZD +5) on 13 May 1983?

1318: You are to sail from Elizabethport, N.J., on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 25.5 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?

1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.

1320: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

1321: A lighthouse can be identified by its __________.

1322: What will be the velocity of the tidal current at Grant's Tomb, 123rd Street, NY, NY, at 1412 EST (ZD +5) on 22 March 1983?

1323: The magnetic compass error which changes with the geographical location of your vessel is called __________.

1324: When daylight savings time is kept, the time of tide and current calculations must be adjusted. One way of doing this is to __________.

1325: You change course entering port and steady up on a range with the lights in line. After a few minutes you observe the range lights as shown. You should alter your heading to the __________. (D047NG )

1326: A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of a(n) __________.

1328: What will be the velocity of the tidal current in Bolivar Roads, Texas, at a point 0.5 mile north of Ft. Point, on 23 November 1983 at 0330 CST (ZD +6)?

1329: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?

1330: You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.

1331: When trying to sight a lighthouse you notice a glare from a town in the background. The range at which the light may be sighted due to this glare is __________.

1332: The longitude of the upper vertex of a great circle track is 169E. What is the longitude of the lower vertex?

1333: If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?

1334: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "H" represents __________. (D042NG )

1335: Plain language is usually used on marine weather __________.

1336: On the approach of a warm front, barometric pressure usually __________.

1337: What will be the time of maximum flood current at Sagamore Bridge on the Cape Cod Canal during the morning of 6 December 1983 (ZD +5)?

1338: Which type of cloud is indicated by the number 6? (D039NG )

1339: You are on course 303T. To check the speed of your vessel you should observe a celestial body on which bearing?

1340: The annual change in variation for an area can be found in __________.

1341: The height of a light is measured from which reference plane?

1342: An occluded front on a weather map is colored __________.

1342: An occluded front on a weather map is colored __________.

1343: Variation is a compass error that you __________.

1344: Which of the buoy symbols shown indicates a safe water mark? (D032NG )

1345: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015NG?

1346: Cirrus clouds followed by cirrostratus then altostratus, stratus, and occasionally nimbostratus indicate the approach of a(n) __________.

1347: What will be the velocity of the tidal current south of Doubling Point, ME, at 1357 EST (ZD +5) on 3 April 1983?

1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.

1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.

1349: The symbols shown are used on radio facsimile weather charts. Which of these symbols indicates a severe squall line? (D042NG )

1350: You are running parallel to the coast and plotting running fixes using bearings of the same object. You are making more speed than assumed for the running fix. In relation to the position indicated by the fix you will be __________.

1351: Luminous range is the __________.

1352: Weather observations provided by each weather station include all of the following except __________.

1353: The difference in degrees between true north and magnetic north is called __________.

1354: A ship is in longitude 5400'W on a true course of 090. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?

1355: The parallax of the Moon is greatest when the Moon is __________.

1356: The first indications a mariner will have of the approach of a warm front will be __________.

1357: You will transit the Cape Cod Canal on 7 November 1983. If you arrive at the R R Bridge at 1655 EST (ZD +5), for what period of time during your transit will you have currents of not more than 0.5 knot?

1358: Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.

1359: The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?

1360: Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?

1361: The luminous range of a light takes into account the __________.

1362: Which type of cloud is indicated by the number 7 in illustration D039NG? (D039NG )

1363: True heading differs from magnetic heading by __________.

1364: The Sailing Directions are published in the Enroute format and the __________.

1365: The same side of the Moon is always toward the Earth, but more than half of its surface has been seen due to libration. Libration in latitude occurs because __________.

1366: Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) __________.

1367: You want to transit Hell Gate, NY on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.3 knot?

1368: What area of the earth cannot be shown on a standard Mercator chart?

1369: Which of the following is the most useful factor for predicting weather?

1370: Which type of cloud is indicated by the number 8? (D039NG )

1372: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

1373: The reaction of a gyrocompass to an applied force is known as __________.

1374: On a working copy of a weather map, a warm front is represented by what color line?

1375: The Moon rises earlier on succeeding days when the __________.

1376: What is typical of warm front weather conditions?

1377: What is the velocity of the tidal current at the east end of Pollock Rip Channel at 1700 DST (ZD +4) on 23 July 1983?

1378: The latitude of the upper vertex of a great circle is 36N. What is the latitude of the lower vertex?

1379: The lubber's line on a magnetic compass indicates __________.

1380: Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?

1381: Geographic range is the maximum distance at which a light may be seen under __________.

1382: The chart indicates the variation was 345'W in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?

1383: The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?

1384: Which type of cloud is indicated by number 9? (D039NG )

1385: What is the length of the lunar day?

1386: The FIRST indications a mariner will have of the approach of a warm front will be __________.

1386: The FIRST indications a mariner will have of the approach of a warm front will be __________.

1387: You will be entering the Mystic River in Connecticut. What is the current at the Highway Bridge at 1900 EST (ZD +5) on 24 January 1983?

1388: If you observe a rapid fall of barometric pressure you should __________.

1389: A boundary between two air masses is a(n) __________.

1390: The fog most commonly encountered at sea is called __________.

1391: When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________.

1392: Cumulonimbus clouds are indicated by which number? (D039NG )

1393: The directive force of a gyrocompass __________.

1394: A great circle crosses the equator at 17W. It will also cross the equator at what other longitude?

1395: The lunar day is __________.

1396: On the approach of a warm front the barometric pressure usually __________.

1397: What will be the velocity of the tidal current at Port Jefferson Harbor Entrance, NY, at 1600 EST (ZD +5) on 23 December 1983?

1398: Nimbostratus clouds are indicated by what number in illustration D039NG? (D039NG )

1399: You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay entrance begins at 1800 EST (ZD +5), at what time would you depart from the Chesapeake Bay entrance to have the most favorable current?

1400: Which type of cloud is among the most dependable for giving an indication of an approaching weather system?

1401: The maximum distance at which a light may be seen under existing visibility conditions is called __________.

1402: As a vessel changes course to starboard, the compass card in a magnetic compass __________.

1403: Which statement about the gyrocompass is FALSE?

1404: A great circle will intersect the equator at how many degrees of longitude apart?

1404: A great circle will intersect the equator at how many degrees of longitude apart?

1405: After Venus passes the point of greatest elongation east in its orbit, the first position in which the elongation will be zero is __________.

1406: What will act to dissipate fog?

1408: An occluded front is caused by a(n) __________.

1409: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033T, and bears 284T, 43 miles from you. What is the time to intercept if you make 16 knots?

1410: A white buoy marked with an orange rectangle indicates __________.

1411: The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.

1412: The distance between the surface of the water and the tidal datum is the __________.

1412: The distance between the surface of the water and the tidal datum is the __________.

1413: The gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction is called __________.

1414: You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the dangers to navigation in the English Channel?

1415: Planetary aberration is due, in part, to __________.

1416: Radiation fog __________.

1417: Determine the first time after 1200 EST (ZD +5) when the velocity of the current will be 0.5 knot on 18 November 1983, at Marcus Hook, PA.

1418: Static on your AM radio may be __________.

1419: The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________.

1420: the position labeled "E" was plotted because __________. (D051NG )

1421: What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer with a height of eye of 65 feet?

1422: Cumulus clouds are indicated by what number in illustration D039NG? (D039NG )

1423: Quadrantal error in a gyrocompass has its GREATEST effect __________.

1424: Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________.

1425: Which is an inferior planet?

1426: Fog is most commonly associated with a(n) __________.

1427: Determine the duration of the first PM slack water on 3 March 1983, east of the Statue of Liberty, when the current is less than 0.1 knot?

1428: The speed of sound in water is approximately __________.

1429: A celestial body will cross the prime vertical circle when the latitude is numerically __________.

1430: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?

1431: A lighthouse is 120 feet (36.6 meters) high and the light has a nominal range of 18 miles. Your height of eye is 42 feet (12.8). If the visibility is 11 miles, approximately how far off the light will you be when the light becomes visible?

1432: What benefit is a weather bulletin to a mariner?

1433: A system of reservoirs and connecting tubes in a gyro compass is called a __________.

1434: What is NOT a characteristic of cardinal marks?

1435: Inferior conjunction is possible for __________.

1436: Fog forms when the air __________.

1437: Determine the time after 0300 CST (ZD +6) when the velocity of the tidal current will be 0.5 knot on 16 April 1983, at Port Arthur Canal Entrance, TX.

1438: In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The best course of action is to bring the wind on the __________.

1439: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "G" represents a __________. (D042NG )

1440: A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.

1441: Your height of eye is 40 feet (12.2 meters). What is the approximate geographical distance at which Ambrose Light, NY, could be visible? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".

1442: A great circle track provides the maximum saving in distance on __________.

1443: At the master gyrocompass, the compass card is attached to the __________.

1444: Stratocumulus clouds are indicated by which number? (D039NG )

1445: The planet Mars will have its greatest magnitude when at __________.

1446: When compared to air temperature, which factor is most useful in predicting fog?

1447: What will be the velocity of the tidal current 6 miles south of Shoal Point, NY, at 1850 DST (ZD +4) on 9 July 1983?

1448: Spring tides occur when the __________.

1449: The presence of stratus clouds and a dying wind will usually result in __________.

1450: The distance between the surface of the water and the tidal datum is the __________.

1452: When is the rhumb line distance the same as the great circle distance?

1453: Indications of the master gyrocompass are sent to remote repeaters by the __________.

1454: Atmospheric pressure may be measured with a(n) __________.

1455: Inferior conjunction is possible for __________.

1456: The fog produced by warm moist air passing over a cold surface is called __________.

1457: What is the period of time from around 1008 DST (ZD +4) at Canapitsit Channel, MA, on 7 August 1983, in which the current does not exceed 0.4 knot?

1458: When navigating coastwise and hurricane warnings are received, you should __________.

1459: In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is __________.

1460: What is the major advantage of a rhumb line track?

1461: The chart indicates the variation was 345'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply?

1462: Altocumulus clouds are indicated by which number? (D039NG )

1463: If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?

1463: If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?

1464: A line of position derived from a loran reading is a section of a(n) __________.

1465: The planet Venus can be observed in the morning before sunrise if it is well to the __________.

1465: The planet Venus can be observed in the morning before sunrise if it is well to the __________.

1466: Advection fog is most commonly caused by __________.

1467: Determine the time after 0730 EST (ZD +5) when the velocity of the current will be 2.1 knots on 26 March 1983, at Fort Pulaski, GA.

1468: What is NOT an advantage of the rhumb line track over a great circle track?

1469: The charted channel depth at Eastport, ME, is 28 feet. You are drawing 31.5 feet and wish 2 feet clearance under the keel. What is the earliest time after 1700 (ZD +4) on 6 September 1983 that you can enter the channel?

1470: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates a hurricane? (D042NG )

1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?

1473: Which statement about gyrocompass error is TRUE?

1474: You are on course 061T. To check the longitude of your vessel you should observe a celestial body on which bearing?

1475: Which type of cloud is the classic "thunderhead"?

1476: When warm moist air blows over a colder surface and is cooled below its dew point, the result is __________.

1477: The wind in the vicinity of Nantucket Shoals Light has been southerly at an average speed of 23 knots. The predicted set and drift of the rotary tidal current are 225 at 0.8 knot. What are the set and drift of the current you can expect at Nantucket Shoals Light?

1478: Altostratus clouds are indicated by which number? (D039NG )

1479: A microbarograph is a precision instrument that provides a __________.

1480: What is the definition of height of tide?

1481: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".

1482: Which statement concerning current is TRUE?

1483: The most accurate method of determining gyrocompass error while underway is by __________.

1484: You should plot your dead reckoning position at __________.

1485: The safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone is to __________.

1485: The safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone is to __________.

1486: Which condition would most likely result in fog?

1487: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.

1488: What defines a great circle?

1489: Cumulonimbus clouds can produce __________.

1490: In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.

1491: You are on course 138T. To check the latitude of your vessel you should observe a celestial body on which bearing?

1492: You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?

1493: You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?

1494: Cirrocumulus clouds are indicated by which number? (D039NG )

1495: A great circle crosses the equator at 157W. It will also cross the equator at what other longitude?

1496: In a microbarograph, the pen should be checked and the inkwell filled __________.

1497: When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.

1498: A true bearing of a charted object, when plotted on a chart, will establish a __________.

1499: You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?

1500: In what order should the following sextant adjustments be made? I. Make telescope parallel to frame of sextant. II. Set horizon glass perpendicular to frame of sextant. III. Make index mirror and horizon glass parallel when index arm is set at zero. IV. Set index mirror perpendicular to frame of sextant.

1501: What is the distance from the bottom of a wave trough to the top of a wave crest?

1502: You are running parallel to the coast and take a running fix using bearings of the same object. If you are making less speed than used for the running fix, in relation to the position indicated by the fix, you will be __________.

1503: A radar range to a small, charted object such as a light will provide a line of position in which form?

1504: The time meridian used when computing the height of tide for Pensacola Bay, FL, is __________.

1505: At 0000 you fix your position and change course to 090T. At 0030 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?

1506: You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green light. How should you pass this buoy?

1507: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.

1508: A line of position is __________.

1509: Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours. You should __________.

1510: During daylight savings time the meridian used for determining the time is located farther __________.

1511: When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports every __________.

1511: When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports every __________.

1512: You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?

1513: Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.

1514: The compass error of a magnetic compass that has no deviation is __________.

1515: An aneroid barometer on a boat should always be __________.

1516: Which correction(s) must be applied to an aneroid barometer?

1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.

1518: Which publication requires infrequent corrections?

1519: You are preparing a weather report form, WS Form B-80. Your position is LAT 1038'S, LONG 0014'E. How would this be encoded? (D041NG )

1520: The diurnal inequality of the tides is caused by __________.

1521: To avoid error you should read the scale of an aneroid barometer with your eye placed __________.

1522: The pressure-sensitive element of an aneroid barometer is called a __________.

1523: Which is a characteristic of the weather preceding an approaching warm front?

1524: A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.

1526: A single barometric pressure reading of 28.60 indicates __________.

1527: Your vessel is on course 270T, speed 10 knots. The apparent wind is from 10 off the port bow, speed 30 knots. From which direction is the true wind?

1528: Cirrostratus clouds are indicated by which number? (D039NG )

1529: Widely spaced isobars on a weather map indicate __________.

1530: In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave, are called __________.

1532: The position labeled "E" was plotted because __________. (D051NG )

1533: Lighted information markers show __________.

1534: You are preparing a weather report form, WS Form B-80. Your position is LAT 2231'S, LONG 13819'W. How would this be encoded? (D041NG )

1535: When observing a rapid rise in barometric pressure, you may expect __________.

1536: What will NOT induce errors into a Doppler sonar log?

1537: Which sextant in illustration D043NG reads 2947.5'? (D043NG )

1538: The winds of the "roaring forties" are strongest near __________.

1539: You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indicates that an earthquake has occurred in the Aleutians and has generated a tsunami that is predicted to hit Hawaii. What action is necessary for the ship's safety?

1540: You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on it. Which of the following is TRUE?

1541: You are preparing a weather report form, WS Form B-80. Your position is LAT 4935'N, LONG 16249'E. How would this be encoded? (D041NG )

1542: To find a magnetic course from a true course you must apply __________.

1543: The distance between the surface of the water and the tidal datum is the __________.

1544: The height of a tide can be increased by __________.

1545: The change in the length of day becomes greater as latitude increases because of the __________.

1546: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow triangle painted on it. Which statement is TRUE?

1547: Which light combination does NOT indicate a navigational channel passing under a fixed bridge?

1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )

1550: Cirrus clouds are indicated by which number? (D039NG )

1551: In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.

1552: Which sextant in illustration D043NG reads 3042.5'? (D043NG )

1554: A slow rise in the barometric pressure forecasts __________.

1555: Under the U.S. Aids to Navigation System, a yellow buoy is a __________.

1556: The vertical distance from the tidal datum to the level of the water is the __________.

1557: A Doppler log in the volume reverberation mode indicates __________.

1558: As a high pressure system approaches, the barometer reading __________.

1559: You are underway in the North Sea on course 216T when you sight a buoy bearing 021 relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy __________.

1560: Under the IALA-A and B Buoyage Systems, a buoy with alternating red and white vertical stripes indicates __________.

1561: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which statement is TRUE?

1563: Neap tides occur only __________.

1564: What is a characteristic of cardinal marks?

1565: Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), for an observer with a height of eye of 60 feet (18.3 meters).

1566: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates thunderstorms? (D042NG )

1567: Buoys and day beacons exhibiting a yellow triangle or square painted on them are used __________.

1568: You are approaching a vertical lift bridge. You know the span is fully open when __________.

1569: Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.

1570: The navigational triangle uses parts of two systems of coordinates, one of which is the horizon system and the other is the __________.

1571: Which sextant in illustration D043NG reads 2942.7'? (D043NG )

1572: Generally speaking, in the Northern Hemisphere, when winds are blowing from between SE and SW the barometric reading __________.

1574: Information about currents around Pacific Coast ports of the U.S. is found in the __________.

1576: You are entering an east coast port and see a buoy with a yellow triangle painted on it. This indicates __________.

1577: Yesterday your chronometer read 11h 59m 59s at 1200 GMT time tick. Today the chronometer reads 12h 00m 01s at the 1200 GMT tick. What is the chronometer rate?

1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 9915'E. What is your ZT of sunrise?

1579: You get underway from the oil terminal at Marcus Hook, PA, at 0815 ZT (ZD +5) on 20 February 1983, enroute to sea. You will be turning for 11 knots. What is the approximate current when you are abreast Reedy Island?

1581: Shown are the symbols used on radio facsimile weather charts. The symbol indicated at letter "I" represents __________. (D042NG )

1582: Sextant C in illustration D043NG reads __________. (D043NG )

1583: The angle measured from the observer's meridian, clockwise or counterclockwise up to 180, to the vertical circle of the body is the __________.

1584: A decrease in barometric pressure is associated with all of the following except __________.

1585: The sidereal day begins when the __________.

1586: A green buoy has a yellow triangle on it. This is a(n) __________.

1587: In general, the most effective period for observing stars and planets occurs during the darker limit of __________.

1588: The letter D in illustration D006NG represents the __________.

1589: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

1590: Civil twilight starts at 1812 zone time on 26 August 1981, Your DR position at that time is LAT 2106'S, LONG 1456' W. Which statement concerning the planets available for evening sights is TRUE?

1592: A white buoy marked with an orange rectangle indicates __________.

1593: Apparent altitude is sextant altitude corrected for __________.

1594: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "P" represents __________. (D042NG )

1595: The Light List indicates that a light has a nominal range of 8 miles and is 48 feet(14.6 meters) high. If the visibility is 6 miles and your height of eye is 35 feet(10.7 meters), at what approximate distance will you sight the light?

1596: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which of the following is TRUE?

1597: The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.

1598: A slow, gradual fall of the barometer indicates approaching __________.

1599: The time interval between successive wave crests is called the __________.

1600: Zenith distance is equal to __________.

1600: Zenith distance is equal to __________.

1601: Sextant B in illustration D043NG reads __________. (D043NG )

1602: Most modern Loran-C receivers automatically detect secondary station blink which __________.

1603: A position that is obtained by using two or more intersecting lines of position, taken at nearly the same time, is a(n) __________.

1604: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates freezing rain? (D042NG )

1606: Aids to navigation marking the intracoastal waterway can be identified by __________.

1607: When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.

1608: When using a buoy as an aid to navigation which of the following should be considered?

1609: A rapid rise or fall of the barometer indicates __________.

1610: When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?

1611: What indicates a dual purpose buoy?

1612: The strongest winds and heaviest rains in a hurricane are found in the __________.

1612: The strongest winds and heaviest rains in a hurricane are found in the __________.

1613: Where would you find information concerning the duration of slack water?

1614: Hot air can hold __________.

1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )

1616: Which picture in illustration D034NG shows a Morse (A) light? (D034NG )

1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.

1618: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?

1619: Sextant A reads __________. (D043NG )

1620: You are at anchor in the anchorage at the entrance to Delaware Bay. If you weigh anchor at 1445 DST (ZD +4) on 24 July 1983 and proceed northbound enroute to Philadelphia at a speed of 10 knots, you will have __________.

1623: Which of the following statements is FALSE?

1624: A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.

1625: A sling psychrometer is used to measure __________.

1626: Which instrument is used to measure the relative humidity of the air?

1627: An instrument that maintains a continuous record of humidity changes is called a __________.

1628: As the temperature of the air reaches the dew point, __________.

1629: Air temperature varies with __________.

1631: Which picture shows an occulting light? (D034NG )

1632: Lighted white and orange buoys must show which color light?

1633: To find a magnetic compass course from a true course you must apply __________.

1634: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.

1635: An isotherm is __________.

1636: A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as __________.

1637: Which of the following is NOT a form of precipitation?

1638: Clouds form __________.

1639: Sextant D reads __________. (D043NG )

1640: Clouds with the prefix "nimbo" in their name __________.

1641: The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.

1642: Which type of cloud formation should be of immediate concern to small craft operators?

1643: Cumulus clouds that have undergone vertical development and have become cumulonimbus in form, indicate __________.

1644: Which scale is used to estimate wind speed by observing sea conditions __________.

1646: Which picture in illustration D034NG shows a flashing light? (D034NG )

1647: Cumulonimbus clouds are formed by __________.

1648: A sign of thunderstorm development is a cumulus cloud __________.

1649: If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?

1651: From which type of cloud can a tornado or waterspout develop?

1652: Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________.

1653: In a weather report, the term "visibility" expresses __________.

1654: Which weather element cannot be measured accurately while on board a moving vessel?

1655: Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 1200 time tick. What is the chronometer rate?

1656: Which instrument is most useful in forecasting fog?

1657: Fog is formed when __________.

1658: Fog forms when the air temperature is at or below __________.

1659: The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as __________.

1660: Which of the following is TRUE of advection fog?

1661: Advection fog may be formed by warm moist air passing over a __________.

1662: Fog generally clears when the __________.

1663: What is the primary source of the earth's weather?

1664: Ascending and descending air masses with different temperatures is part of an important heat transmitting process in our atmosphere called __________.

1665: Air circulation is caused or affected by __________.

1666: The process by which the temperature and/or moisture characteristics of an air mass changes is called __________.

1667: Air masses near the earth's surface __________.

1671: Cirrus clouds are composed primarily of __________.

1672: Data relating to the direction and velocity of rotary tidal currents can be found in the __________.

1673: Information about currents on the Pacific Coast of the U. S. is found in the __________.

1674: The letter D in illustration D006NG represents the __________.

1675: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )

1676: Lighted information markers show __________.

1677: The position labeled "E" was plotted because __________. (D051NG )

1678: Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?

1680: A weather front exists when __________.

1681: You can expect frontal activity when two air masses collide and __________.

1682: Which of the listed properties does warm air possess?

1683: As it approaches, a typical warm front will bring __________.

1684: Which type of frontal passage is associated with a relatively narrow band of precipitation?

1685: Squall lines with an almost unbroken line of threatening dark clouds and sharp changes in wind direction, generally precede a(n) __________.

1686: Which of the following statements concerning frontal movements is TRUE?

1687: Which statement is TRUE when comparing cold and warm fronts?

1688: Which type of front forms when a cold front overtakes and forces a warm front upwards?

1689: The "horse latitudes" are regions of __________.

1689: The "horse latitudes" are regions of __________.

1690: In regions near the poles, the winds are generally described as __________.

1691: Which of the following is associated with consistently high barometric pressure?

1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.

1693: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.

1694: In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.

1695: Compared to a low pressure system, generally the air in a high is __________.

1696: Two well-developed high pressure areas may be separated by a __________.

1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?

1698: When a high pressure system is centered north of your vessel in the Northern Hemisphere __________.

1699: In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the __________.

1700: Generally speaking, you should expect to find low atmospheric pressure prevailing in the earth's __________.

1701: Which general weather conditions should you expect to find in a low pressure system?

1702: In a cyclone the lowest pressure is found in the __________.

1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.

1704: If the center of low pressure is due west of you in the Northern Hemisphere, which wind direction should you expect?

1705: Two well-developed low pressure areas may be separated by a __________.

1706: In the Northern Hemisphere a wind is said to veer when the wind __________.

1707: "Surface circulation" is another term for __________.

1708: What generally occurs when the land is cooler than the nearby water?

1709: The Beaufort scale is used to estimate the __________.

1710: A gale is characterized by a wind speed of __________.

1711: An instrument that indicates wind direction is known as a(n) __________.

1712: Tornados are often associated with __________.

1713: When a tornado moves over the water from land it is called a __________.

1714: Which statement concerning storm surges on the Great Lakes is FALSE?

1715: The hurricane season generally occurs from __________.

1716: The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.

1717: A tropical storm is a tropical cyclone that generates winds of __________.

1718: A hurricane is characterized by winds of __________.

1719: What is the direction of rotation of tropical cyclones, tropical storms and hurricanes in the Northern Hemisphere?

1720: In the Southern Hemisphere winds in a low pressure system rotate in a __________.

1721: A storm's track is characterized by all of the following except __________.

1722: Hurricanes may move in any direction. However, it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the __________.

1723: The intensity of a hurricane as it reaches higher latitudes and cooler waters __________.

1724: What is the first visible indication of the presence of a tropical cyclone or hurricane?

1725: Your present weather is sunny with a steady barometer. A low swell approaches your vessel from the south with crests passing at relatively long periods of about four per minute. This usually indicates __________.

1726: How can you estimate the position of a tropical storm's center?

1727: What enables you to estimate the bearing of a storm's center?

1728: If a hurricane several hundred miles away is moving in your general direction your barometer would __________.

1729: The first cloud formations you can use to indicate the bearing of the center of a hurricane or tropical storm are __________.

1730: If you observe the point of cloud convergence shifting to the right and the "bar" of the storm appears to move along the horizon __________.

1731: When your vessel is on or near the path of an approaching tropical storm the __________.

1732: The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the __________.

1733: An instrument which maintains a continuous record of temperature changes is called a __________.

1733: An instrument which maintains a continuous record of temperature changes is called a __________.

1734: The eye of the hurricane has __________.

1735: A vessel entering the eye of a hurricane should expect __________.

1736: Which statement is FALSE concerning the dangerous semicircle of a hurricane?

1737: You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.

1738: In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle because __________.

1739: Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?

1740: If you are in the dangerous semicircle of a hurricane you can expect all of the following except __________.

1741: The left half of the storm is called the navigable semicircle because __________.

1742: In the Northern hemisphere which semicircle of a hurricane is the navigable semicircle?

1743: In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle it should be positioned with the wind on the __________.

1744: Which condition suggests that your present position lies in the navigable semicircle of a tropical storm?

1745: When your vessel is on the storm track but behind the storm's center the __________.

1746: Swells that have outrun the storm are produced in the __________.

1749: If the current and wind are in opposite directions, the sea surface represents __________.

1750: Clearance gauges at bridges indicate __________.

1751: A tsunami is caused by a(n) __________.

1752: What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

1753: On a weather map, a large letter "H" means __________.

1754: The dumping of refuse in a lock is permitted __________.

1755: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?

1756: Where would you expect to find climatological and meteorological tables for the Gulf Coast area?

1757: Where would you obtain data on currents for areas of the world not covered by the U.S. National Ocean Service?

1758: The climate of the eastern Gulf coast __________.

1759: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic north or magnetic south?

1760: A Doppler log in the bottom return mode indicates the __________.

1761: Chart legends which indicate a conspicuous landmark are printed in __________.

1762: In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and __________.

1763: Weather patterns in the Gulf Coast area of the United States are __________.

1764: What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?

1765: Which meteorological feature controls the climate of the Gulf and the Gulf Coast area during late spring and summer?

1766: You are approaching a lock and see a flashing amber light located on the lock wall. You should __________.

1767: Which statement describes the prevailing wind direction in mid-winter in the Gulf Coast area?

1768: A flashing red light displayed at a single lock means that the lock __________.

1769: Under the numbering system used by NGA (NIMA), a three digit number may be used for __________.

1770: A Doppler speed log indicates speed over ground __________.

1771: Which type of precipitation is a product of the violent convection found in thunderstorms?

1772: The GP of a body for a high altitude sight is determined from the declination and the __________.

1773: A "Norther" in the Gulf of Mexico is __________.

1774: Restricted areas at locks and dams are indicated by __________.

1775: The letter A in illustration D006NG represents the __________.

1776: A vessel operating on the Great Lakes, and whose position is southeast of an eastward-moving storm center, would NOT experience __________.

1777: If the current and wind are in the same direction, the sea surface represents a wind speed __________.

1778: Illustration D037NG represents a movable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at A if the lock walls and piers are not awash? (D037NG )

1779: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles and your height of eye is 20 feet, at which approximate distance will you sight the light?

1780: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.

1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.

1782: You are on course 027T and take a relative bearing to a lighthouse of 220. What is the true bearing to the lighthouse?

1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.

1784: If your vessel were proceeding down river (descending), a green square marker with a green reflector border on the right bank would be a __________.

1785: Which factor(s) is/are used to develop the charted information of a lighthouse?

1786: You are downbound approaching a lock and see 3 green lights in a vertical line. This indicates __________.

1787: What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?

1788: You can follow the approach of a dangerous cyclonic storm by inspecting __________.

1789: The Illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter F in the illustration? (D036NG )

1790: A Doppler speed log indicates speed through the water __________.

1791: The accuracy of an azimuth circle can be checked by __________.

1793: Which weather element cannot be measured accurately while on board a moving vessel?

1794: Why are low altitude sun sights not generally used?

1795: Which weather element cannot be measured accurately while on board a moving vessel?

1796: Which weather element cannot be measured accurately while on board a moving vessel?

1797: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.

1798: The climate of the northern Gulf coast __________.

1799: The letter D in illustration D006NG represents the __________.

1800: In order to insure that a RACON signal is displayed on the radar, you should __________.

1801: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.

1802: What is the major advantage of high altitude observations?

1803: The difference between the DR position and a fix, both of which have the same time, is caused by __________.

1804: Magnetic information on a chart may be __________.

1805: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.

1806: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart a wire dragged (swept) area may be shown in purple or __________.

1807: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?

1808: A white buoy with an open-faced orange diamond on it indicates __________.

1809: What occurs when rising air cools to the dew point?

1810: Where will you find information about the duration of slack water?

1811: To find a magnetic compass course from a true course you must apply __________.

1812: The line of position should be plotted as a circle around the GP of the body when the Ho exceeds what minimum value?

1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?

1816: A white buoy with an orange circle marked on it indicates __________.

1818: In order to utilize the capacity of a lock to its maximum, pleasure craft are locked through with all of the following EXCEPT __________.

1820: Information on the operating times and characteristics of foreign radio beacons can be found in which publication?

1822: What is the relative bearing of an object broad on the port bow?

1824: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C in the illustration? (DO36NG )

1826: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D in the illustration? (D036NG )

1827: The position labeled "D" was plotted because __________. (D051NG )

1828: When entering from seaward, a buoy displaying a single-flashing red light indicates __________.

1829: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D036NG )

1830: A vessel heading NNW is on a course of __________.

1831: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

1832: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic northeast or magnetic southeast?

1836: At evening stars, the first stars that should be observed are those with an azimuth in what quadrant?

1838: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel __________.

1840: A vessel heading NW is on a course of __________.

1841: The letter A as shown represents the __________. (D006NG )

1842: What is the major problem with taking high altitude observations?

1844: What is the relative bearing of an object sighted dead ahead?

1848: The buoy symbol printed on your chart is leaning to the northeast. This indicates __________.

1850: A vessel heading WNW is on a course of __________.

1852: When plotting a circle of equal altitude for a high altitude sight, the radius of the circle is determined by the formula __________.

1858: A white buoy with an orange cross within a diamond marked on it indicates __________.

1859: While proceeding downriver (descending) you sight a red diamond-shaped panel with small, red reflector squares in each corner on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.

1860: A vessel heading WSW is on a course of __________.

1862: What is the relative bearing of an object broad on the starboard quarter?

1866: What term is used to describe a tank barge constructed with the structural framing inside the cargo tank and the side shell plating containing the cargo?

1868: Illustration D036NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter A in the illustration? (D036NG )

1869: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B in the illustration? (D036NG )

1870: A vessel heading SW is on a course of __________.

1871: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.

1872: To find a magnetic compass course from a true course you must apply __________.

1873: Lighted information markers show __________.

1874: Lighted white and orange buoys must show which color light?

1875: The position labeled "E" was plotted because __________. (D051NG )

1879: A chart projection depicting the poles and a small area on either side of a connecting meridian, that is sometimes used for star charts, is the __________.

1880: A vessel heading SSW is on a course of __________.

1882: The GP of a body for a high altitude sight is determined from the Greenwich hour angle and the __________.

1883: Pressure gradient is a measure of __________.

1884: If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is picked up, what depth of water is indicated?

1885: Under the Uniform State Waterway Marking System a mooring buoy is painted __________.

1886: What is the relative bearing of an object dead astern?

1887: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?

1888: What is the relative bearing of an object broad on the starboard bow?

1890: A vessel heading SSE is on a course of __________.

1892: The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.

1898: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East coast?

1899: What is the relative bearing of an object broad on the starboard beam?

1899: What is the relative bearing of an object broad on the starboard beam?

1900: A parallax correction is NOT applied to observations of the __________.

1902: Under the numbering system used by NGA (NIMA), a four digit number is used for __________.

1902: Under the numbering system used by NGA (NIMA), a four digit number is used for __________.

1904: In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?

1905: In order to insure that the racon signal is visible on your 3 cm radar, the __________.

1906: In the horizon system of coordinates what is equivalent to latitude on the Earth?

1907: Information about direction and velocity of rotary tidal currents is found in the __________.

1908: What is the brightest navigational planet?

1909: In the horizon system of coordinates what is equivalent to the equator on the Earth?

1910: What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?

1914: In the horizon system of coordinates what is equivalent to longitude on the Earth?

1916: The prime vertical is the reference point from which the angle of which type of observation is measured?

1918: The Moon appears larger in diameter at the zenith than when near the horizon. What is this called?

1919: The nadir is the point on the celestial sphere that is __________.

1920: Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________.

1922: In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown would be fitted to the buoy? (D030NG )

1923: Little or no change in the barometric reading over a twelve hour period indicates __________.

1923: Little or no change in the barometric reading over a twelve hour period indicates __________.

1924: The point on the celestial sphere that is directly below an observer is the __________.

1925: Above-normal tides near the center of a hurricane may be caused by the __________.

1926: The prime vertical is the great circle on the celestial sphere that passes through the __________.

1928: "Rotation" is the __________.

1930: The phase correction should be applied to sights of Venus and Mars __________.

1932: The zenith is the point on the celestial sphere that is __________.

1932: The zenith is the point on the celestial sphere that is __________.

1934: The great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon is the __________.

1936: The parallel of latitude at 6633'N is the __________.

1940: The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.

1941: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.

1942: In the horizon system of coordinates what is equivalent to the declination of the equator system?

1944: In the horizon system of coordinates what is the equivalent to the celestial equator of the celestial equator system?

1946: When making landfall at night, you can determine if a light is a major light or an offshore buoy by __________.

1948: "Space motion" is the __________.

1949: "Revolution" is the __________.

1950: The error in a sextant altitude caused by refraction is greatest when the celestial body is __________.

1951: Spring tides occur __________.

1952: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?

1954: In the horizon system of coordinates what is equivalent to the poles on the Earth?

1955: The letter A in illustration D006NG represents the __________.

1955: The letter A in illustration D006NG represents the __________.

1956: In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 second intervals. Which of the four topmarks shown would be fitted to this buoy? (D030NG )

1958: The spinning of a celestial body about its axis is known as __________.

1960: Astronomical refraction causes a celestial body to appear __________.

1961: What kind of pressure systems travel in tropical waves?

1962: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.

1964: The great circle on the celestial sphere that passes through the zenith and the north and south poles is the __________.

1968: The Earth has the shape of a(n) __________.

1969: The precession of the equinoxes of the Earth is __________.

1970: The azimuth angle of a sun sight is always measured from the __________.

1972: The point on the celestial sphere that is directly over the observer is the __________.

1974: Ocean currents are well defined and __________.

1976: The Moon is nearest to the Earth at __________.

1978: A celestial body's complete orbit around another body is __________.

1979: The principal vertical circle is that great circle on the celestial sphere that passes through the __________.

1982: In the horizon system of coordinates what is equivalent to the Greenwich hour angle of the celestial equator system?

1984: When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.

1986: The Moon is farthest from the Earth at __________.

1987: An instrument useful in predicting fog is the __________.

1988: The parallel of latitude at 2327'N is the __________.

1989: In the horizon system of coordinates what is the equivalent to the meridians on the Earth?

1990: The navigational triangle uses parts of two systems of coordinates, one of which is the celestial equator system, the other system is the __________.

1992: The parallel of latitude at 2327'S is the __________.

1994: Fomalhaut is found in what constellation?

1996: When approaching a lock entrance, the visual signal displayed when a single lock is ready for entrance is a flashing __________.

2000: A vessel heading SE is on a course of __________.

2001: You have changed course and steadied up on a range. Your heading is 285T, same as the charted range, and it appears as in illustration D048NG. After several minutes the range appears as in illustration D047NG and your heading is still 285T. This indicates a __________. (D047NG )

2002: What term is used to describe a river barge designed to carry coal or any similar cargo not requiring weather protection?

2004: The velocity of the wind, its steady direction, and the amount of time it has blown determines a wind driven current's __________.

2006: What is the relative bearing of an object broad on the port beam?

2007: Information about the direction and velocity of rotary tidal currents is found in the __________.

2008: What term is used to describe a tank barge constructed with the structural framing outside the cargo tank and the cargo tank plating separated from the shell plating?

2010: A vessel heading ESE is on a course of __________.

2014: Which stock number indicates an NGA (NIMA) chart designed for navigation outside of outlying reefs and shoals?

2016: Which statement about the Flinders bar of the magnetic compass is CORRECT?

2018: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?

2019: At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?

2020: A vessel heading ENE is on a course of __________.

2021: While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather should be forecasted?

2022: The GP of a body for a high altitude sight is determined from the declination and the __________.

2022: The GP of a body for a high altitude sight is determined from the declination and the __________.

2024: In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG would be fitted to this buoy under the IALA Buoyage Systems? (D030NG )

2028: Which stock number indicates an NGA (NIMA) chart designed for navigation and anchorage in a small waterway?

2030: A vessel heading NE is on a course of __________.

2040: A vessel heading NNE is on a course of __________.

2042: At morning stars, the last stars that should be observed are those with an azimuth in which quadrant?

2043: Stormy weather is usually associated with regions of __________.

2044: What is the relative bearing of an object broad on the port quarter?

2048: You are upbound approaching a lock and dam and see two green lights in a vertical line. This indicates __________.

2049: At morning stars, the first stars that should be observed are those with an azimuth in which quadrant?

2050: The point where the vertical rise or fall of tide has stopped is referred to as __________.

2052: Under the chart numbering system used by NGA (NIMA), the first digit of a multi-digit number indicates __________.

2053: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.

2054: The diagram is of a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B? (D038NG )

2056: This illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C? (D038NG )

2058: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D in the illustration? (D038NG )

2059: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D038NG )

2060: What is the relative bearing of an object broad on the starboard quarter?

2061: Fog is likely to occur when there is little difference between the dew point and the __________.

2062: The Illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter F in the illustration? (D038NG )

2066: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2067: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 5 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?

2068: The illustration represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )

2069: Illustration D037NG represents a moveable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )

2070: What is the relative bearing of an object on the port beam?

2072: The Illustration represents a movable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )

2073: Chart legends printed in capital letters show that the associated landmark is __________.

2074: When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?

2075: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

2076: You should plot your dead reckoning position __________.

2078: If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?

2079: Permission to enter the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal?

2080: You are on course 030T. The relative bearing of a lighthouse is 45. What is the true bearing?

2081: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

2082: You are holding position above Gallipolis Lock and Dam when you hear two long blasts of the horn from the lock. This indicates that you should __________.

2083: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

2084: You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should __________.

2085: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.

2086: You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. You hear one short blast of the whistle from the lock. You should __________.

2087: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?

2088: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

2089: Permission to leave the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal?

2090: You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.

2090: You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.

2091: The velocity of the current in large coastal harbors is __________.

2092: Descending boats, while awaiting their turn to enter a lock, shall NOT block traffic from the lock. They shall be above the lock by at LEAST __________.

2093: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.

2097: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?

2099: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T. The range appears as shown and is closing. Which action should you take? (D047NG )

2100: You are underway in a vessel with a draft of 7.0 feet (2.1 meters). The charted depth for your position is 9 fathoms. You compute the height of tide to be +3.0 feet (0.9 meters). You determine the depth of the water beneath your keel to be __________.

2101: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.

2102: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?

2103: The description "Racon" beside an illustration on a chart would mean a __________.

2104: A white buoy marked with an orange rectangle indicates __________.

2110: You are underway in a vessel with a draft of 6.0 feet. You are in an area where the charted depth of the water is 4 fathoms. You would expect the depth of water beneath your keel to be approximately __________.

2111: Vessels regularly navigating Ohio and Mississippi rivers above Cairo, Illinois, and their tributaries, shall at all times have on board a copy of __________.

2112: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.

2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.

2114: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.

2115: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.

2116: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of the __________.

2119: Which stock number indicates an NGA (NIMA) chart designed for fixing positions at sea and DR plotting while on a long voyage?

2120: If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)

2121: In plotting a running fix, how many fixed objects are needed to take your lines of position from?

2122: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.

2124: You must draw a plotting sheet covering latitudes 45N to 49N and longitudes 179E to 178W. If the distance between latitude 45N to 49N is 20 inches, what is the distance between the meridians of 1 of longitude?

2125: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

2126: Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.

2127: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2128: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2129: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2130: You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________.

2131: The white lights in a vertical line on a multiple-span bridge indicate __________.

2132: What is the definition of height of tide?

2134: The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, the Moon will be __________.

2140: The visible range marked on charts for lights is the __________.

2141: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2142: Which lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2143: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2144: Yesterday your chronometer read 02h 59m 58s at the 1500 GMT time tick. Today the chronometer reads 03h 00m 02s at the 1500 GMT time tick. What is the chronometer error?

2145: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2146: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2147: What lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

2150: On a Mercator chart, 1 nautical mile is equal to __________.

2152: Permanent magnetism is found in __________.

2158: Permanent magnetism is caused by __________.

2159: Induced magnetism is found in __________.

2160: Information for updating nautical charts is primarily found in the __________.

2161: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?

2162: The new Moon cannot be seen because the Moon is __________.

2163: The letter C in illustration D006NG represents the __________.

2164: The line connecting the points of the earth's surface where there is no dip is the __________.

2165: The illustration represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash? (D037NG )

2166: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2167: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2168: By convention, the north pole of a magnet is painted __________.

2169: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

2170: The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the __________.

2171: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?

2174: By convention, the Earth's north magnetic pole is colored __________.

2175: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, which light(s) will be shown at D if the lock walls and piers are not awash?

2176: The illustration represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )

2177: This diagram represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )

2178: The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?

2179: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312. The quadrantal spheres are arranged athwartships. What action should be taken to remove this error during compass adjustment?

2180: Relative humidity is defined as __________.

2181: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?

2182: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?

2182: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?

2183: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?

2184: By convention, the south seeking ends of a compass' magnets are colored __________.

2184: By convention, the south seeking ends of a compass' magnets are colored __________.

2186: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266. What action should be taken?

2187: The diagram represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )

2188: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. What action should be taken to remove this error during compass adjustment?

2189: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. What action should be taken to remove this error during compass adjustment?

2190: Clouds are classified according to their __________.

2191: The chart indicates the variation was 345'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?

2192: Off Fire Island, NY, with winds from the southwest, the average wind-driven current flows in a direction of __________.

2194: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. What action should be taken to remove this error during compass adjustment?

2196: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312. What action should be taken to remove this error during compass adjustment?

2198: Opposition occurs when __________.

2199: Denebola is found in what constellation?

2200: Cloud formations are minimal when the __________.

2202: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276. What action should be taken?

2203: You get underway from the shipyard in Chester, PA, at 1515 DST (ZD +4) on 6 August 1983, enroute to sea. You will be turning for eight knots. What current can you expect at Fourteen Foot Bank Light?

2207: Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?

2209: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266. You should now adjust the compass until it reads __________.

2210: A dead reckoning (DR) plot __________.

2211: What is the length of a nautical mile?

2212: Which information is found in the chart title?

2214: By convention, the Earth's south magnetic pole is colored __________.

2215: You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.

2216: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317. What action should be taken to remove this error during compass adjustment?

2219: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317. What action should be taken to remove this error during compass adjustment?

2220: A dead reckoning (DR) plot __________.

2222: By convention, the south pole of a magnet is painted __________.

2222: By convention, the south pole of a magnet is painted __________.

2224: By convention, the north seeking ends of a compass' magnets are colored __________.

2226: Upper limb observations of the Moon are used more frequently than those of the Sun because of the location of the Moon in the sky and the __________.

2229: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. What action should be taken to remove this error during compass adjustment?

2230: A nautical mile is a distance of approximately how much greater than or less than a statute mile?

2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. Which action should be taken to remove this error during compass adjustment?

2234: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003. What action should be taken to remove this error during compass adjustment?

2236: Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?

2237: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.

2238: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312. What action should be taken to remove this error during compass adjustment?

2239: A flashing green light displayed at a single lock means that the lock is __________.

2240: If you observe a buoy off station you should __________.

2241: The letter C in illustration D006NG represents the __________.

2242: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356. Which action should be taken to remove this error during compass adjustment?

2243: Which aid is NOT marked on a chart with a magenta circle?

2244: Capella is found in what constellation?

2246: The speed of an ocean current is dependent on __________.

2248: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356. What action should be taken to remove this error during compass adjustment?

2250: The most important information to be obtained from a barometer is the __________.

2251: Which statement concerning the chartlet shown is TRUE? (Soundings and heights are in meters) (D010NG )

2252: The vertical angle between the horizontal and the magnetic line of force is the __________.

2254: A rock and sand structure extending from the bank of the river toward the channel is known as a __________.

2255: The height of tide is the __________.

2256: The constellation that contains Polaris is __________.

2258: The primary use of apparent time in marine navigation is to __________.

2259: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317. What action should be taken to remove this error during compass adjustment?

2261: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.

2262: The Milky Way is an example of a __________.

2264: The revision date of a chart is printed on which area of the chart?

2266: It is difficult to determine which limb of the Moon is fully illuminated __________.

2268: What condition exists at perigee?

2269: One of the factors which affects the circulation of ocean currents is __________.

2270: The lubber's line of a magnetic compass __________.

2271: What is the definition of height of tide?

2272: Mars will not be visible __________.

2274: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086. What action should be taken to remove this error during compass adjustment?

2276: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086. Which action should be taken to remove this error during compass adjustment?

2277: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?

2278: Superior conjunction occurs when __________.

2279: Antares is found in what constellation?

2280: Which would influence a magnetic compass?

2282: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276. You should now adjust the compass until it reads __________.

2284: Bellatrix is found in what constellation?

2286: Which light signal indicates that you have permission to enter a lock on the Ohio River?

2288: A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

2289: The constellation that contains the pointer stars is __________.

2290: Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________.

2292: The points on the earth's surface where the magnetic dip is 90 are __________.

2294: What celestial body may sometimes be observed in daylight?

2296: A variable star is one that __________.

2296: A variable star is one that __________.

2298: The period of rotation of the Moon on its axis is __________.

2299: What condition exists at apogee?

2300: When a magnetic compass is not in use for a prolonged period of time it should __________.

2301: The letter C in illustration D006NG represents the __________.

2304: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?

2306: In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown would be fitted to the buoy? (D031NG )

2308: The points where the Sun is at 0 declination are known as __________.

2309: The plane of the ecliptic is inclined to the plane of the celestial equator by what angle?

2310: Which weather instrument measures atmospheric pressure?

2312: Mars is only seen at two phases, one of which __________.

2314: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086. What action should be taken to remove this error during compass adjustment?

2316: Elongation becomes zero at __________.

2317: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and your height of eye is 25 feet (7.6 meters), at what approximate distance will you sight the light?

2318: Miaplacidus is found in what constellation?

2319: In low latitudes, the new Moon will always rise at about __________.

2320: The type of current which will have the greatest effect on the course made good for your vessel is __________.

2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356. Which action should be taken?

2324: Deneb is found in what constellation?

2326: A double star is a star that __________.

2328: Universal time (UTI) is another name for __________.

2329: In low latitudes, a last quarter moon will always rise at about __________.

2330: You are heading in a northerly direction when you come across an easterly current. Your vessel will __________.

2332: Magnetic dip is a measurement of the angle between the __________.

2334: Other than the Sun and Moon, the brightest object in the sky is __________.

2335: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles and your height of eye is 25 feet, at what approximate distance will you sight the light?

2336: The period of revolution of the Moon is __________.

2338: A group of stars which appear close together and form a striking configuration such as a person or animal is a __________.

2340: What is a "Special Warning"?

2341: Which statement concerning illustration D010NG is correct? (Soundings and heights are in meters)

2342: What happens because of augmentation?

2342: What happens because of augmentation?

2344: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?

2344: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?

2345: You should plot your dead reckoning position __________.

2346: The first point of Aries is the point where the Sun is at __________.

2348: Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on the __________.

2349: The summer solstice is the point where the Sun is at __________.

2350: The principal advantage of NAVTEX radio warnings is that __________.

2351: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.

2352: When a superior planet is at 90 elongation, it is also at __________.

2353: A single line of position combined with a dead-reckoning position results in a(n) __________.

2354: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093. What action should be taken to remove this error during compass adjustment?

2356: As observed from the Earth, the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as __________.

2358: Altair is found in what constellation?

2360: What U.S. agency is responsible for NAVAREA warnings?

2361: The range of tide is the __________.

2362: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004. Which action should be taken?

2363: As shown, the position labeled C was plotted because __________. (D051NG )

2364: The immediate surroundings of what constellation contain the most first magnitude stars?

2366: The major problem with Moon sights is the __________.

2369: Which magnetic compass corrector(s) CANNOT be set on a heading of magnetic east or magnetic west?

2370: In the United States, short-range radio navigational warnings are broadcast by the __________.

2372: In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks illustrated in diagram D031NG would be fitted to this buoy? (D031NG )

2373: The vertical distance from the tidal datum to the level of the water is the __________.

2374: The largest of the navigational planets is __________.

2375: The shortest distance between any two points on earth defines a __________.

2376: A large group of stars revolving around a center is known as a __________.

2378: Which light signal indicates that you may approach the lock?

2379: The winter solstice is the point where the Sun is at __________.

2380: The navigation regulations applicable to a U.S. inland waterway can be found in the __________.

2381: The difference between the heights of low and high tide is the __________.

2382: What causes geocentric parallax?

2384: On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged by the __________.

2386: The path that the Sun appears to take among the stars is the __________.

2387: You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you navigate __________.

2388: The reference point for determination of GMT is the passage of the mean sun over what line?

2389: The autumnal equinox is the point where the Sun is at __________.

2390: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You hear a siren being sounded at the facility. What does this indicate?

2392: The point where the Sun is at maximum declination north or south is __________.

2394: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093. What action should be taken to remove this error during compass adjustment?

2396: Perihelion is the point where the Sun __________.

2397: The letter D in illustration D006NG represents the __________.

2399: Which statement about the time diagram shown is TRUE? (D008NG )

2400: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light on the facility light up. What does this indicate?

2402: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356. You should now adjust the compass until it reads __________.

2404: The dividing meridian between zone descriptions +7 and +8 is __________.

2406: The dividing meridian between zone descriptions +4 and +5 is __________.

2408: What is the equivalent of 42 min. 48 sec. in arc units?

2408: What is the equivalent of 42 min. 48 sec. in arc units?

2409: You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first. Which signals should you sound?

2410: A facility used for the discharge of a cargo of a particular hazard, such as chlorine, butane or ethane, must have what to warn water traffic of an immediate danger during fire or cargo release?

2412: The permanent magnetism of a vessel may change in polarity due to __________.

2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38S to 43S and longitude 178E to 175W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?

2416: An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?

2418: While proceeding downriver, you sight a red triangular-shaped daymark on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.

2419: A backlash below a lock is defined as a __________.

2420: You are on course 355T and take a relative bearing of a lighthouse of 275. What is the true bearing of the lighthouse?

2420: You are on course 355T and take a relative bearing of a lighthouse of 275. What is the true bearing of the lighthouse?

2422: The dimmest stars that could be reasonably used for navigational purposes are of what magnitude?

2423: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.

2424: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which of the topmarks shown? (D046NG )

2425: A vessel's position should be plotted using bearings of __________.

2426: You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.

2428: If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by __________.

2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?

2430: You are on course 222T and take a relative bearing of a lighthouse of 025. What is the true bearing to the lighthouse?

2432: A time diagram is a diagram of the celestial sphere as observed from above the __________.

2434: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093. What action should be taken to remove this error during compass adjustment?

2435: What is a lighted safe water mark fitted with to aid in its identification?

2436: Aphelion is the point where the Sun __________.

2437: When daylight savings time is kept, the times of tide and current calculations must be adjusted. One way of doing this is to __________.

2438: The radar control that reduces weak echoes out to a limited distance from the ship is the __________.

2439: Which statement about the time diagram in illustration D008NG is TRUE? (D008NG )

2440: You are on course 357T and take a relative bearing of a lighthouse of 180. What is the true bearing to the lighthouse?

2442: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004. You should now adjust the compass until it reads __________.

2444: What is the equivalent of 048' in time units?

2446: What is the equivalent of 47 min. 20 sec. in arc units?

2448: What is the equivalent of 37 min. 32 sec. in arc units?

2450: You are on course 180T and take a relative bearing of a lighthouse of 225. What is the true bearing of the lighthouse?

2452: The permanent magnetism of a vessel may change in strength due to __________.

2454: Illustration D037NG represents a moveable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at C if the lock walls and piers are not awash? (D037NG )

2456: An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?

2458: In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2) is used for lights on __________.

2459: The controlling depth of the river is __________.

2459: The controlling depth of the river is __________.

2460: You are on course 344T and take a relative bearing of a lighthouse of 270. What is the true bearing to the lighthouse?

2462: Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?

2464: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark shown? (D046NG )

2466: On the Western Rivers, a vessel crossing a river must __________.

2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.

2469: A tow that is properly aligned to pass through a narrow opening between two bridge piers is "________________".

2470: You are on course 344T and take a relative bearing of a lighthouse of 090. What is the true bearing to the lighthouse?

2472: The Sun is closest to the Earth in what month?

2474: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356. What action should be taken to remove this error during compass adjustment?

2476: At meridian transit, the diagram used by a navigator to illustrate the angles involved is based on the __________.

2478: On 23 August 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 11642.8'. The height of eye is 56 feet and the index error is 2.0' on the arc. What is the observed altitude (Ho)?

2479: The equation of time measures the __________.

2480: You are on course 277T and take a relative bearing of a lighthouse of 045. What is the true bearing to the lighthouse?

2481: The letter D as shown represents the __________. (D006NG )

2482: When a vessel changes course from one cardinal heading to another cardinal heading while adjusting the compass, which action should be taken?

2483: A white buoy with an orange rectangle on it is used to indicate __________.

2484: What is the equivalent of 153' in time units?

2486: What is the equivalent of 23 min. 20 sec. in arc units?

2488: In which publication could you find information concerning the minimum lighting required for bridges on U.S. waters?

2489: You are approaching a drawbridge and must pass through during a scheduled closure period. What signal should you sound?

2490: A vertex of the navigational triangle is NOT located at the __________.

2492: A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.

2494: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 30". The area includes latitude 28N to 35N and longitude 175E to 178W. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?

2496: An orange and white buoy marking a danger area will have what symbol on it?

2498: The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers for lights on __________.

2499: The "head of the bend" is the __________.

2500: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

2502: The major factor that causes the color difference between a red star (Betelgeuse) and a blue star (Rigel) is __________.

2504: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark shown? (D046NG )

2505: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.

2506: Which is TRUE on the Western Rivers when a vessel downbound with a following current is meeting an upbound vessel?

2508: Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from __________.

2509: All persons or vessels within the lock area, including the lock approach channels, come under the authority of the __________.

2510: When correcting apparent altitude to observed altitude, you do NOT apply a correction for __________.

2512: In the time diagram shown __________. (D005NG )

2514: Sidereal time is NOT used __________.

2516: Apparent time is based on __________.

2518: In low latitudes, the full Moon will always rise at about __________.

2519: The standard time meridian for zone description -12 is __________.

2520: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reference level and __________.

2522: The letter H in illustration D006NG represents the __________. (D006NG )

2524: What is the equivalent of 2 35' in time units?

2525: Daylight savings time is a form of zone time that adopts the time __________.

2526: What is the equivalent of 10 min. 52 sec. in arc units?

2527: In the doldrums you can expect __________.

2528: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter A in the illustration? (D038NG )

2529: A bridge over a navigable waterway is being repaired. There is a traveler platform under the bridge's deck that significantly reduces the vertical clearance. If required by the CG district commander, how will this be indicated at night?

2530: The distance between any two meridians measured along a parallel of latitude __________.

2532: You must construct a Mercator plotting sheet on a piece of paper measuring 28" by 32". The area includes latitude 32S to 39S and longitude 005E to 003W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?

2534: You must construct a Mercator plotting sheet on a piece of paper measuring 26" by 30". The area includes latitude 2815'N to 3545'N and longitude 17400'E to 17800'W. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?

2536: A revised print of a chart is made __________.

2538: The light characteristic of composite group flashing (2 + 1) is used in the Aids to Navigation System on the Western Rivers for lights on __________.

2539: Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is on the __________.

2540: The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.

2542: Which magnetic compass corrector(s) CANNOT be set while the vessel is on a heading of magnetic north or magnetic south?

2544: At McAlpine L & D, normal upper pool elevation is 420.0 feet MSL, equal to 12.0 feet on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet above normal pool. What is the clearance if the gage reads 27.2 feet?

2546: A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________.

2548: On the Mississippi River, gage zero is the gage reading measured from the __________.

2560: A plane that cuts the Earth's surface at any angle and passes through the center will always form __________.

2562: In the time diagram shown __________. (D005NG )

2566: When the time is based on the movement of the visible Sun along the ecliptic the time is known as __________.

2567: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.

2569: The mean sun used to measure time moves __________.

2570: A plane that cuts the Earth's surface and passes through the poles will always form __________.

2572: The dividing meridian between zone descriptions -4 and -5 is __________.

2574: What is the equivalent of 252' in time units?

2576: What is the equivalent of 8 min. 56 sec. in arc units?

2578: You must draw a plotting sheet covering latitudes 49N to 53N and longitudes 179E to 178W. If the distance between latitude 49N to 53N is 16 inches, what is the distance between the meridians of 1 of longitude?

2579: A phase correction may be applicable to correct the sextant altitude correction of __________.

2579: A phase correction may be applicable to correct the sextant altitude correction of __________.

2580: The angle at the pole measured through 180From the prime meridian to the meridian of a point is known as __________.

2582: You must construct a Mercator plotting sheet on a piece of paper measuring 32" by 36". The area includes latitude 31S to 37S and longitude 005W to 002E. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?

2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?

2584: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 36". The area includes latitude 3045'S to 3715'S and longitude 00400'E to 00500'W. Allow a one inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?

2585: The letter D as shown represents the __________. (D006NG )

2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.

2587: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?

2588: You are approaching an open drawbridge and sound the proper signal. You receive no acknowledgment from the bridge. Which action should you take?

2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.

2590: A plane perpendicular to the polar axis will never form what line on the Earth's surface?

2592: A deadhead is a(n) __________.

2594: At McAlpine L & D, normal upper pool elevation is 420.0 feet (130.8 meters) MSL, equal to 12.0 feet (3.7 meters) on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet (22.1 meters) above normal pool. What is the clearance if the gage reads 10.6 feet (3.2 meters)?

2596: The abbreviation L.W.R.P. on the navigation maps means __________.

2597: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.

2598: A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way?

2600: A parallel of latitude other than the equator is a __________.

2602: The lunar day is also known as the __________.

2604: A sidereal day is approximately how much shorter than a solar day?

2606: The measurement of local time is based on the passage of the Sun over the __________.

2608: You should plot your dead reckoning position __________.

2609: The letter A in illustration D006NG represents the __________. (D006NG )

2610: A line on the Earth parallel to the equator is a __________.

2612: The dividing meridian between zone descriptions -7 and -8 is __________.

2614: What is the equivalent of 436' in time units?

2616: What is the equivalent of 4 min. 04 sec. in arc units?

2618: You must draw a plotting sheet covering latitudes 38N to 43N and longitudes 179E to 178W. If the distance between each degree of longitude is 5 inches, what is the distance between latitude 38N and latitude 43N?

2619: In low latitudes, a first quarter Moon will always rise at about __________.

2620: The navigator is concerned with three systems of coordinates. Which system is not of major concern?

2624: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 32". The area includes latitudes 3110'S to 3740'S and longitudes 00700'W to 00100'E. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?

2625: Stormy weather is usually associated with regions of __________.

2626: What information is found in the chart title?

2627: Stormy weather is usually associated with regions of __________.

2628: A drawbridge may use visual signals to acknowledge a vessel's request to open the draw. Which signal indicates that the draw will NOT be opened immediately?

2629: In both regions of the IALA buoyage system, which topmark is used on a special mark? (D022NG )

2630: In the celestial equator system of coordinates what is NOT equivalent to the longitude of the Earth system of coordinates?

2632: A section of the river that is narrower than usual and is often navigable from bank to bank is a __________.

2634: Under the U.S. Aids to Navigation System on the Western Rivers, a preferred-channel buoy is __________.

2636: You are ascending a river and exchanging navigational information via radiotelephone with a descending vessel. If the descending vessel advises you to "watch for the set" above point X, what would you expect to encounter above point X?

2638: A vessel crossing a river on the Western Rivers has the right of way over __________.

2639: Under the U.S. Aids to Navigation System used on the Western Rivers, aids to navigation lights on the right descending bank show __________.

2640: In the celestial equator system of coordinates what is the equivalent to the meridians of the Earth system of coordinates?

2642: Local sidereal time is equal to the __________.

2644: The sidereal day begins __________.

2646: During daylight savings time the meridian used for determining the time is located farther __________.

2648: The 3-cm radar as compared to a 10-cm radar with similar specifications will __________.

2649: The letter C in illustration D006NG represents the __________. (D006NG )

2650: In the celestial equator system of coordinates what is equivalent to the colatitude of the Earth system of coordinates?

2651: Low pressure disturbances which travel along the intertropical convergence zone are called __________.

2652: The dividing meridian between zone descriptions -10 and -11 is __________.

2654: What is the equivalent of 554' in time units?

2656: What is the equivalent of 0 min. 16 sec. in arc units?

2658: You must draw a plotting sheet covering latitudes 45N to 49N and longitudes 179E to 178W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45N and latitude 49N?

2659: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

2660: In the celestial equator system of coordinates what is equivalent to the longitude of the Earth system of coordinates?

2662: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 28". The area includes latitude 37S to 42S and longitude 175E to 179W. Allow a one inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?

2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.

2666: The following boats are approaching a lock. Which has priority for locking?

2668: You are approaching a drawbridge and have sounded the request-for-opening signal. The bridge has responded with five short blasts. What reply should you sound?

2669: Under the IALA Buoyage System, which topmark shown will be displayed on a safe water mark? (D023NG )

2670: The angle that is measured westward from the first point of Aries to the hour circle of the body along the celestial equator is the __________.

2672: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.

2673: A bluff bar is a bar __________.

2674: In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceeding downstream will __________.

2675: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.

2676: The place where a channel moves from along one bank of the river over to the other bank of the river is called a __________.

2678: A vessel crossing a river on the Western Rivers, must keep out of the way of a power-driven vessel __________.

2679: Under the U.S. Aids to Navigation System on the Western Rivers, a daymark on the right descending bank will __________.

2680: The angle measured eastward from the vernal equinox along the celestial equator often expressed in time units is the __________.

2682: Sidereal time is used by navigators when __________.

2683: A vessel's position should be plotted using bearings of __________.

2684: The maximum difference between mean time and apparent time is __________.

2686: The standard time meridian for description +12 is __________.

2687: The letter B in illustration D006NG represents the __________.

2688: The 10-cm radar as compared to a 3-cm radar of similar specifications will __________.

2689: The letter D in illustration D006NG represents __________. (D006NG )

2690: Right ascension is primarily used by the navigator for __________.

2692: The dividing meridian between zone descriptions -2 and -3 is __________.

2694: What is the equivalent of 1048' in time units?

2695: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

2696: You must draw a plotting sheet covering latitudes 52S to 56S and longitudes 179W to 175E. If the distance between latitude 52S to 56S is 24 inches, what is the distance between the meridians of 1 of longitude?

2698: You must draw a plotting sheet covering latitudes 38N to 41N and longitudes 179E to 178W. If the distance between each degree of longitude is 4 inches, what is the distance between latitude 38N and latitude 41N?

2700: In the horizon system of coordinates what is equivalent to the meridian angle of the celestial equator system?

2702: You must draw a plotting sheet covering latitudes 46N to 48N and longitudes 179E to 178W. If the distance between each degree of longitude is 2 7/8 inches, what is the distance between latitude 46N and 48N?

2703: Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?

2704: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________.

2705: Information about the direction and velocity of rotary tidal currents is found in the __________.

2706: The following types of vessels are awaiting lockage on the upper Mississippi. Which type of vessel is normally passed through the lock first?

2707: You will find information about the duration of slack water in the __________.

2708: You are approaching a drawbridge and have sounded the proper whistle signal requesting it to open. You hear a signal of one prolonged and one short blast from the bridge. Which action should you take?

2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )

2710: In the horizon system of coordinates what is equivalent to the local hour angle of the celestial equator system?

2711: Information about currents on the Pacific Coast of the U. S. are found in the __________.

2712: A bold reef is a reef __________.

2714: A current moving across a lock entrance toward the river or toward the dam is called a(n) __________.

2716: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are __________.

2718: A power-driven vessel operating in a narrow channel with a following current, on the Western Rivers, is meeting an upbound vessel. Which statement is TRUE?

2719: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the right descending bank are __________.

2719: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the right descending bank are __________.

2720: When pushing barges ahead close to a steep revetment where there is no current, what is MOST likely to occur?

2721: You are plotting a running fix. How many fixed objects are needed to take your lines of position from?

2722: The paths of intended travel between three or more points is the __________.

2724: Which condition indicates that your radar needs maintenance?

2725: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.

2726: A daymark used as a special mark is indicated by which letter in the diagram? (D045NG )

2729: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 5.5 seconds after the signal was sounded. What is the distance to the shore?

2730: When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________.

2737: A lateral system buoy displaying a quick light __________.

2738: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 3 seconds after the signal was sounded. What is the distance to the shore?

2739: A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated by what letter in illustration D045NG?

2740: When one upbound vessel is overtaking another vessel and both are pushing a tow ahead, what reaction may you expect?

2741: A general chart could have a scale of __________.

2742: A white diamond daymark with an orange border is a(n) __________.

2744: The standard atmospheric pressure measured in inches of mercury is __________.

2746: What is used to measure wind velocity?

2750: When pushing a tow and approaching barges tied off to the shore, you should __________.

2752: A daymark used to indicate the safe water in a channel will have which of the shapes shown? (D045NG )

2760: You are pushing a tow ahead, at high speed, near the right hand bank of a canal. The forces affecting your towboat and tow will tend to __________.

2762: You take a bearing of 176 of a lighthouse. Which bearing of another object would give the best fix?

2764: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG?

2766: In low latitudes, the high(s) of the diurnal variation of pressure occur(s) at __________.

2768: Which type of daymark is used to mark the starboard side of the channel when entering from sea?

2769: If your vessel must pass through a draw during a scheduled closure period, what signal should you sound to request the opening of the draw?

2770: What is most likely to happen when you push a multiple tow into a countercurrent?

2772: The direction in which a vessel should be steered between two points is the __________.

2772: The direction in which a vessel should be steered between two points is the __________.

2774: Your radar is set on a true motion display. Which of the following will NOT appear to move across the PPI scope?

2776: For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?

2777: A sailing chart could have a scale of __________.

2778: A special daymark is a __________.

2779: The buoy indicated by the letter B in illustration D044NG is a __________.

2780: You are pushing a tow ahead and passing close to another towboat which is pushing ahead in the same direction (you are overtaking). After the towheads pass close alongside __________.

2782: Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope.

2788: The Light List indicates that a dayboard is a type KGW. You should __________.

2790: A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 800 feet, where is the approximate location of the pivot point of the unit?

2791: The letter B in illustration D006NG represents the __________.

2792: You take a bearing of 142 and 259 of two objects. Which bearing of a third object will give the best fix?

2794: The standard atmospheric pressure in millibars is __________.

2796: The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.

2798: A can buoy is indicated by which letter in illustration D044NG?

2800: Where is the pivot point of a towboat with a tow ahead?

2801: Mean high water is used __________.

2802: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?

2804: The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used __________.

2805: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range as shown on your starboard beam. You should __________. (D047NG )

2809: The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.

2810: When steering a tow downstream around the shape of a sand bar, and staying on the proper side of the buoys, an operator should be cautious of __________.

2812: A line of position from a celestial observation is a segment of a __________.

2814: In low latitudes the range of the diurnal variation of pressure is up to __________.

2816: The length of a wave is the length __________.

2818: You take bearings of 313T and 076T on two objects. Which bearing of a third object will give the best fix?

2819: The time interval between successive wave crests is called __________.

2820: A towboat is pushing barges ahead at a dangerously fast speed when __________.

2821: The height of tide is the __________.

2822: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 seconds after the signal was sounded. What is the distance to the shore?

2824: When you turn on the fast time constant (differentiator) control of a radar it will __________.

2826: You take a bearing of 043 and 169 of two objects. What bearing of a third object will give the best fix?

2828: The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.

2829: A spar buoy is indicated by which letter in illustration D044NG?

2830: The proper way to approach a downstream lock where there is an outdraft is to be __________.

2831: A coastal chart could have a scale of __________.

2832: The Light List indicates that a dayboard is a type MR. You should __________.

2836: The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.

2838: You take a bearing of 191 and 313 to two objects. Which bearing of a third object will give the best fix?

2839: Privately maintained aids to navigation included in the Light List __________.

2840: The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?

2841: You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.

2842: The draw span of a floating drawbridge may be marked with __________.

2842: The draw span of a floating drawbridge may be marked with __________.

2843: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.

2844: The signal from a ramark will show on the PPI as a __________.

2846: Which type of daymark is used to mark the port side of the channel when entering from sea?

2848: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 6 seconds after the signal was sounded. What is the distance to the shore?

2849: You take a bearing of 086 of a lighthouse. What bearing of another object would give the best fix?

2850: What is used to help prevent damage to barges, locks, and landings when you are locking or landing a tow?

2851: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.

2852: A daymark warning of a danger will have the shape indicated by which letter? (D045NG )

2854: The distance in miles between the circle of equal altitude for the observed altitude (Ho) and the circle of equal altitude for the computed altitude (Hc) is the __________.

2858: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the signal was sounded. What is the distance to the shore?

2859: The buoy indicated by the letter C in illustration D044NG is a __________.

2860: On the Mississippi and Ohio Rivers, there is a special type of fog known as steam fog. It is caused by __________.

2862: When slanted letters are used to spell the name of a charted object you know the __________.

2866: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January?

2868: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T and have the range in sight as shown. Which action should you take? (D048NG )

2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )

2870: Steam fog is most likely to occur on the Mississippi and Ohio Rivers in __________.

2874: What daymark has NO lateral significance?

2875: A harbor chart could have a scale of __________.

2876: On 13 November 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 10923.6'. The height of eye is 66 feet, and the index error is 2.0' off the arc. What is the observed altitude (Ho)?

2877: Class I and II private aids to navigation in or along navigable waters of the United States are listed in the __________.

2878: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?

2880: While upbound through Memphis, the weather report on the TV news indicates that a cold front will cross western Kentucky and Tennessee the next morning. What weather should accompany this front?

2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?

2884: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

2886: On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.

2887: The letter B in illustration D006NG represents the __________.

2889: On 29 June 1981 you observe a back sight of the upper limb of the Moon. The sextant altitude (hs) is 11416.9'. The height of eye is 36 feet, and the index error is 2.0' off the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?

2890: While passing through Memphis, the weather report on the TV news indicates that a cold front is crossing western Kentucky and Tennessee. Tomorrow's weather will be dominated by a high pressure area. What weather should you expect tomorrow?

2891: Twenty-three meters equals __________.

2892: The Light List indicates that a dayboard is a type NB. You should __________.

2894: Fetch is the __________.

2895: A white buoy with an orange rectangle on it is a(n) __________.

2896: You are navigating in pilotage waters. The maximum time between fixes should be about __________.

2899: You take a bearing of 043 and 169 of two objects. What bearing of a third object will give the best fix?

2900: Who should be consulted for changing conditions of controlling depths in major channels?

2902: The direction a vessel is pointed at any given time is the __________.

2904: Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?

2908: A daymark used to indicate the port side of the channel when approaching from seaward is indicated by what letter in illustration D045NG?

2909: A nun buoy is indicated by which letter in illustration D044NG?

2910: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

2913: The Daily Memorandum contains information on __________.

2914: A daymark with red and green bands, with red uppermost, will have the shape indicated by which letter in illustration D045NG?

2916: You take a bearing of 191 and 313 to two objects. Which bearing of a third object will give the best fix?

2918: Which agency maintains federal aids to navigation?

2920: Navigation charts of the Upper Mississippi River are published by __________.

2922: The Light List indicates that a dayboard is a type TR-SY. You should __________.

2923: You should plot your dead reckoning position __________.

2924: You take a bearing of 264 of a lighthouse. What bearing of another object would give the best fix?

2925: A single line of position combined with a dead-reckoning position results in a(n) __________.

2926: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T and have the range in sight as shown. The range continues to open. Which action should you take? (D047NG )

2927: The position labeled C, as shown, was plotted because __________. (D051NG )

2928: You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. You should report this to the __________.

2929: On 29 June 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 11416.9'. The height of eye is 36 feet and the index error is 2.0' on the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?

2930: How is a navigation light identified on an Army Corps of Engineers navigation map?

2931: The vertical distance from the tidal datum to the level of the water is the __________.

2932: If the main channel under a bridge is marked with lights of the lateral system the adjacent bridge piers should be marked with __________.

2936: Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________.

2937: The depth of the water is indicated on a chart as 32 meters. This is equal to __________.

2938: You take a bearing of 176 of a lighthouse. What bearing of another object would give the best fix?

2939: The buoy indicated by the letter D as shown is a __________. (D044NG )

2940: On the Corps of Engineer's Navigation Maps, the channel is __________.

2941: During daylight savings time the meridian used for determining the time is located farther __________.

2944: The height of a wave is the vertical distance __________.

2945: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

2947: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.

2949: On 13 November 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 10926.3'. The height of eye is 66 feet, and the index error is 2.0' on the arc. What is the observed altitude (HO)?

2950: On an Army Corps of Engineers navigation map, each mile A.H.P. on the Lower Mississippi River is marked by a __________.

2952: The channel under a bridge is marked with lights of the lateral system. The centerline of the channel shall be marked on the bridge by __________.

2954: You are inbound in a channel marked by a range. The range line is 309T. You are steering 306T. The range appears as shown and is closing. Which action should you take? (D047NG )

2956: On 23 August 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 11642.8'. The height of eye is 56 feet and the index error is 2.0' off the arc. What is the observed altitude (Ho)?

2958: Drawbridges equipped with radiotelephones display a __________.

2959: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.

2960: What is NOT found in the Mississippi River System Light List?

2961: Which position includes the effects of wind and current?

2962: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 1/2 seconds after the signal was sounded. What is the distance to the shore?

2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

2965: Which symbol represents a 10-fathom curve?

2966: You take a bearing of 264 of a lighthouse. Which bearing of another object would give the best fix?

2968: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?

2969: A red triangular daymark marks __________.

2970: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________.

2970: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________.

2972: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG?

2973: You should plot a dead reckoning position after every __________.

2974: What daymark shape is used in the lateral system?

2975: The letter H in illustration D006NG represents the __________.

2977: Which symbol represents a 2-fathom curve?

2978: Where do you find the semidiameter correction to be used to correct sextant observations of the stars?

2979: You take a bearing of 356 of a lighthouse. What bearing of another object would give the best fix?

2980: What volume of the Coast Guard Light List is used for the Mississippi River system?

2981: The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________.

2982: You take a bearing of 142 and 259 of two objects. What bearing of a third object will give the best fix? -

2984: What two shapes shown are used to indicate a preferred channel? (D045NG )

2986: Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?

2988: The buoy indicated by the letter A is a __________. (D044NG )

2989: On 13 November 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 11031.2'. The height of eye is 46 feet and the index error is 2.0' off the arc. The horizontal parallax is 61.3'. What is the observed altitude (Ho)?

2990: In which source could you find the vertical clearance of a bridge on the Ohio River?

2991: When using a radar in an unstabilized mode, fixes are determined most easily from __________.

2994: You take a bearing of 313 and 076 of two objects. Which bearing of a third object will give the best fix?

2998: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 3 1/2 seconds after the signal was sounded. What is the distance to the shore?

2999: When entering a channel from seaward, the numbers on buoys __________.

3000: All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the __________.

3002: The diurnal variation of pressure is most noticeable __________.

3003: The height of tide is the __________.

3004: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the signal was sounded. What is the distance to the shore?

3005: The agonic line on an isomagnetic chart indicates the __________.

3006: You are outbound in a channel marked by a range astern. The range line is 309T. You are steering 127T and have the range in sight as shown. What action should you take? (D047NG )

3007: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.

3008: You take a bearing of 086 of a lighthouse. Which bearing of another object would give the best fix?

3009: "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding __________.

3010: A white buoy with a blue band is __________.

3011: The survey information upon which a chart is based is found __________.

3012: The draw span of a floating drawbridge may be marked with __________.

3013: A white buoy with an orange rectangle on it displays __________.

3014: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?

3016: The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the __________.

3017: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.

3018: You take a bearing of 356 of a lighthouse. Which bearing of another object would give the best fix?

3019: Where would you find information about the time of high tide at a specific location on a particular day of the year?

3020: A mooring buoy, if lighted, shows which color light?

3021: Which information is found in the chart title?

3021: Which information is found in the chart title?

3022: A green-and-red banded daymark, green band uppermost, will have the shape shown at letter __________. (D045NG )

3023: You have steadied up on a range dead ahead in line with your keel. After a few minutes the range, still dead ahead, appears as shown. Which action do you take? (D047NG )

3024: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN ?

3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.

3026: A compass card without north-seeking capability that is used for relative bearings is a(n) __________.

3028: The channel under a bridge is marked with aids from the lateral system. The centerline of the channel is marked on the bridge with __________.

3029: On 13 November 1981 you observe a back sight of the upper limb of the Moon. The sextant altitude (hs) is 11031.2'. The height of eye is 46 feet and the index error is 2.0' on the arc. The horizontal parallax is 61.3'. What is the observed altitude (Ho)?

3030: Isogonic lines are lines on a chart indicating __________.

3031: Which symbol would indicate a large automated navigational buoy, such as those that have replaced some lightships? (D015NG )

3032: The direction in which a vessel is steered is the course. The path actually followed is the __________.

3033: A navigator fixing a vessel's position by radar __________.

3035: A major advantage of the NAVTEX system when compared to other systems is that __________.

3036: Which daymark has no lateral significance?

3037: The letter H in illustration D006NG represents the __________.

3038: In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.

3039: As you enter a U.S. channel from seaward the numbers on the buoys __________.

3040: Which instrument is used to predict the approach of a low pressure system?

3041: The letter H in illustration D006NG represents the __________.

3042: How long would a steady wind need to blow in order to create a wind driven current?

3052: The Sailing Directions contain information on __________.

3053: The vertical distance from the tidal datum to the level of the water is the __________.

3054: In illustration D051NG, the position labeled C was plotted because __________.

3055: A single line of position combined with a dead-reckoning position results in a(n) __________.

3056: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.

3057: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.

3060: What information is NOT found in the chart title?

3061: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

3062: If the electronic chart is part of an ECDIS, it must display the minimum data required by IMO/IHO, to include all of the following EXCEPT __________.

3063: Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?

3064: ECDIS units incorporate Digital Chart Data Formats, which include __________.

3065: Raster-scan chart data is __________.

3067: Which of the following are data layer categories to be displayed on ECDIS?

3068: Which of the following data layer categories is NOT displayed on ECDIS?

3069: The database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner, is called the __________.

3070: The database information that should be shown when a chart is first displayed on ECDIS is the __________.

3071: The level of database information which cannot be removed from the ECDIS display and consists of information which is required at all times in all geographic areas and under all circumstances is the __________.

3072: ECDIS must give an alarm for which of the following cases?

3073: ECDIS must give an alarm for which of the following cases?

3074: ECDIS must give an alarm for which of the following cases?

3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.

3076: An ECDIS is required to display which information?

3077: ECDIS must have the capability to preserve the record of the voyage track for the previous __________.

3078: Which data must ECDIS be able to record at one-minute intervals?

3079: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.

3080: Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?

3081: The highest level of commercial navigational accuracy is provided by __________.

3082: Which type of GPS receiver has at least four channels to process information from several satellites simultaneously?

3083: Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?

3084: An ECDIS is required to display which information?

3084: An ECDIS is required to display which information?

3085: An ECDIS is required to display which information?

3086: Which data must ECDIS be able to record at one-minute intervals?

3087: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.

3088: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.

3089: As a licensed Merchant Marine Officer you are expected to __________.

3090: NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of __________.

3091: Which of the following must an ECDIS system be able to perform?

3092: ECDIS must be able to perform all of the following EXCEPT __________.

3093: ECDIS must have the capability to preserve the record of the track for the previous __________.

3094: ECDIS must have the capability to preserve the record of the track for the previous __________.

3095: ECDIS must have the capability to preserve the record of the track for the previous __________.

3101: The typical operating range of automatic identification systems (AIS) at sea is nominally __________.

3102: The typical operating range of automatic identification systems (AIS) at sea is nominally __________.

3103: In general, on how many radio channels will an automatic identification system (AIS) operate?

3104: In general, on how many radio channels will an automatic identification system (AIS) operate?

3105: An automatic identification system (AIS) transponder transmits and receives information broadcasts on _____?

3106: What does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?

3107: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.

3108: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.

3109: While underway, a vessel over 100,000 gross tons with an automatic identification systems (AIS) is expected to broadcast all of the following information every 1 to 10 seconds EXCEPT __________.

3110: While underway, automatic identification systems (AIS) broadcast all of the following information every 1 to 10 seconds EXCEPT the __________.

3111: Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?

3112: With respect to automatic identification systems (AIS) which of the following information is broadcast every one to ten seconds?

3113: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?

3114: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?

3115: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?

3116: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?

3117: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?

3118: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?

3119: Automatic identification systems (AIS) are required to __________.

3120: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to___.

3121: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to___.

3122: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to ___.

3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?

3124: Which of the following statements is TRUE regarding automatic identification systems (AIS)?

3125: Which of the following statements is TRUE regarding automatic identification systems (AIS)?

3126: Which of the following statements is TRUE regarding automatic identification systems (AIS)?

3127: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?

3128: Which of the following statements is TRUE regarding automatic identification systems (AIS)?

3129: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?

3130: When may the automatic identification system (AIS) be switched off?