This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.
62: The Greenville Gage reads 10.6 feet. The high point of your towboat is 54 feet above water. What is the vertical clearance as you pass under the Greenville Highway Bridge?
N a. 75.4 feet Y b. 65.4 feet N c. 54.2 feet N d. 44.4 feet 194: At 2100, you alter course to 250°T and reduce speed to 7 knots. You enter the traffic separation scheme on the inbound side. At 2200, your fix shows you crossing a broken purple line on the chart, and you observe North Chesapeake Entrance Lighted Gong Buoy "NCD" to port. This area is __________.
N a. an area with local magnetic disturbances N b. a pilotage area Y c. a precautionary area centered on buoy "CBJ" N d. in inland waters 217: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water under the keel is about __________.
N a. 59 feet (17.3 meters) N b. 52 feet (15.8 meters) N c. 45 feet (13.6 meters) Y d. 38 feet (11.5 meters) 269: If there is no current, what is the course per standard magnetic compass from your 0802 fix to the position 1.1 miles north of Falkner Island Light?
N a. 099° Y b. 095° N c. 068° N d. 064° 379: A vessel at LAT 32°05.0'N, LONG 81°06.0'W, heads for a destination at LAT 35°57.0'N, LONG 5°45.0'W. Determine the distance by Mercator sailing.
N a. 3128.2 miles Y b. 3770.6 miles N c. 4126.1 miles N d. 4508.0 miles 398: You depart LAT 32°16.6'N, LONG 68°28.0'W. What is the course and distance as calculated by Mercator sailing to a position at LAT 43°12.2'N, LONG 55°39.0'W?
Y a. 042.8°T, 896.2 miles N b. 049.1°T, 955.1 miles N c. 132.8°T, 896.2 miles N d. 136.6°T, 955.1 miles 528: You depart LAT 38°12'S, LONG 12°06'W and steam 1543 miles on course 270°. What is the Longitude of arrival?
Y a. 44°49'W N b. 45°12'W N c. 45°37'W N d. 45°42'W 556: Your 0530 position is LAT 41°04.9'N, LONG 73°01.1'W. What is the course per standard magnetic compass to a position 1.0 mile south of Twenty Eight Foot Shoal "TE" buoy?
Y a. 099.5°psc N b. 096.0°psc N c. 092.5°psc N d. 082.0°psc 669: You are planning a voyage from Cape May (LAT 38°45'N, LONG 74°45'W) to Lisbon (LAT 38°37'N, LONG 09°45'W). Which of the following is TRUE? (Use gnomonic chart WOXZC 5274)
N a. Because the latitudes are almost the same, a great circle track approximates a parallel sailing. Y b. The northern hemisphere vertex is approximately at longitude 42°26'W. N c. The distance is measured by using the length of one degree of the meridian at the position of the vertex. N d. A composite sailing must be plotted to remain south of a limiting latitude of 44°N. 1084: On 4 Dec. , your 1500 ZT DR position is LAT 18°06.0'N, LONG 75°42.0'W. You are on course 020°T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1548 running fix.
N a. LAT 18°10.3'N, LONG 75°34.5'W N b. LAT 18°12.6'N, LONG 75°42.0'W N c. LAT 18°14.0'N, LONG 75°40.0'W Y d. LAT 18°17.3'N, LONG 75°37.7'W 1259: On 10 April , your 1630 ZT DR position is LAT 21°03.0'N, LONG 63°11.0'W. You are on course 324°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?
N a. 1805 N b. 1814 N c. 1818 Y d. 1833 1425: At 1227, on 19 October, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day?
N a. 5.2 mph N b. 5.6 mph N c. 5.9 mph Y d. 6.3 mph 1456: On 12 September , your 0736 zone time DR position is LAT 28°34.0'S, LONG 174°49.0'E. At that time, you observe the Sun bearing 084° per standard magnetic compass (psc). The chronometer reads 07h 38m 11s, and the chronometer error is 01m 46s fast. The variation is 11°W. What is the deviation of the standard magnetic compass?
N a. 2.9°W Y b. 3.2°E N c. 3.9°E N d. 4.7°W 1475: On 26 February , your vessel's 1615 ZT DR position is LAT 25°14'S, LONG 57°22'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 8h 13m 19s, and the Sun is bearing 266.0° per standard magnetic compass. The chronometer error is 01m 46s slow, and the variation in the area is 6°E. What is the deviation of the standard compass?
Y a. 1.7°E N b. 3.4°W N c. 7.7°E N d. 13.7°E 1477: On 27 June , your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?
N a. 1.5°E N b. 1.9°W Y c. 3.0°W N d. 3.0°E 1547: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 5.6 mph Y b. 4.4 mph N c. 2.1 mph N d. 1.8 mph 1762: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1175 x 75 feet Y b. 1190 x 75 feet N c. 1195 x 84 feet N d. 1202 x 84 feet 1918: On 14 January , your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 295°T at an observed altitude (Ho) of 13°50.7'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?
N a. Elnath N b. Fomalhaut N c. Pollux Y d. Markab 2056: What are the color and shape of Togo Island daymark at mile 415.0 AHP?
Y a. Green - Square N b. Green - Diamond N c. Red - Triangle N d. Red - Square 2159: On 25 May , your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?
N a. 069.6°T N b. 110.4°T N c. 249.6°T Y d. 290.4°T 2177: On 21 November , at 0430 ZT, morning stars were observed, and the vessel's position was LAT 22°14.0'S, LONG 79°23.0'E. Your vessel is steaming at 14.5 knots on a course of 246°T. A sextant observation of the Sun's lower limb is made at 0816 ZT. The chronometer reads 03h 14m 16s, and the sextant altitude (hs) is 44°29.2'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye is 61.0 feet (18.6 meters). What is the azimuth (Zn) and intercept (a) of this sight using the assumed position?
N a. Zn 084.2°, a 6.6' A N b. Zn 084.2°, a 6.6' T N c. Zn 095.6°, a 6.6' A Y d. Zn 095.6°, a 6.6' T 2286: You observe the lower limb of the Sun at a sextant altitude (hs) of 50°26.9' on 9 November . The index error is 1.5' on the arc. The height of eye is 56 feet (17 meters). What is the observed altitude (Ho)?
N a. 50°04.2' N b. 50°18.1' Y c. 50°33.5' N d. 50°41.4' 2297: The Platte River empties into which river?
N a. Mississippi N b. Ohio Y c. Missouri N d. Tennessee 2331: What is the coastwise distance from your 0731 fix to Wilmington, DE (LAT 39°43.2'N, LONG 75°31.5'W)?
N a. 339 miles N b. 309 miles N c. 245 miles Y d. 221 miles 2370: As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground, if your vessel is making turns for 10.5 mph?
N a. 16.5 mph Y b. 13.5 mph N c. 10.5 mph N d. 7.5 mph 2461: You have steamed 540 miles at 22 knots and burning 618 barrels of fuel per day. You must decrease your consumption to 372 barrels per day with 299 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
Y a. 16.5 N b. 17.6 N c. 19.1 N d. 20.0 2654: You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?
Y a. 0420 N b. 0423 N c. 0426 N d. 0429 2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?
N a. 035°pgc Y b. 043°pgc N c. 051°pgc N d. 059°pgc 2691: While on a course of 159°T, a light bears 11° on the starboard bow at a distance of 10.6 miles. What course should you steer to pass 2 miles abeam of the light leaving it to starboard?
Y a. 159°T N b. 163°T N c. 167°T N d. 171°T 2851: Your vessel is on a course of 297°T at 11 knots. At 0019 a light bears 274.5°T, and at 0048 the light bears 252°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0102, 2.6 miles Y b. 0108, 3.7 miles N c. 0057, 4.6 miles N d. 0117, 5.0 miles 2861: Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and at what distance off will your vessel be when abeam of the light?
Y a. 0500, 5.0 miles N b. 0504, 6.2 miles N c. 0500, 6.2 miles N d. 0504, 5.0 miles 3060: The propeller on a vessel has a diameter of 24.0 feet and a pitch of 21.3 feet. What would be the slip if the vessel cruised 510 miles in a 24 hour day (observed distance) at an average RPM of 86?
N a. -12.2% N b. +12.2% Y c. -17.5% N d. +17.5% 3095: If the pitch of the propeller is 21.3 feet, and the revolutions per day are 126,214, calculate the day's run allowing 4% positive slip.
Y a. 424.5 miles N b. 442.1 miles N c. 459.9 miles N d. 477.3 miles 3297: Your vessel consumes 236 barrels of fuel per day at a speed of 16.5 knots. What will be the fuel consumption of your vessel at 13.0 knots?
N a. 102 bbls Y b. 115 bbls N c. 147 bbls N d. 186 bbls 3464: You are underway on course 315°T at 14 knots. The current is 135°T at 1.9 knots. What is the course being made good?
N a. 130°T Y b. 315°T N c. 317°T N d. 322°T 3604: You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?
DEVIATION TABLE
MAGNETIC HDG DEVIATION
285° 5°E
270° 3°E
255° 1°E
240° 1°W
N a. 242°psc N b. 271°psc Y c. 278°psc N d. 288°psc 3619: Your vessel is steering course 149°psc, variation for the area is 13°E, and deviation is 4°E. The wind is from the northeast, producing a 4° leeway. What true course are you making good?
N a. 128°T N b. 136°T N c. 162°T Y d. 170°T 10208: Your GPS position is LAT 41°08.5'N, LONG 72°28.8'W. What course must you steer per standard magnetic compass (psc) to leave Cornfield Lighted Whistle Buoy "CF" 0.5 mile abeam to starboard?
N a. 032°psc N b. 048°psc N c. 055°psc Y d. 067°psc 11005: What is the maximum speed permitted in the Main Entrance Channel to Port Jefferson Harbor?
N a. 3 mph N b. 5 mph N c. 7 mph Y d. 12 mph 12204: You sight Stratford Shoal (Middle Ground) Light and Old Field Pt. Light in line and bearing 200° per standard magnetic compass. What is the deviation of the compass?
N a. 7°E N b. 7°W Y c. 3°E N d. 3°W 12705: You are on course 087° per standard magnetic compass when you take the following bearings: Little Gull Island Light 277°psc Race Rock Light 303°psc Latimer Reef Light 025°psc What is your position?
Y a. LAT 41°13.1'N, LONG 71°57.5'W N b. LAT 41°13.1'N, LONG 71°56.9'W N c. LAT 41°13.0'N, LONG 71°58.0'W N d. LAT 41°12.9'N, LONG 71°57.2'W 13702: What chart should you use in Lynnhaven Bay (west of Cape Henry)?
N a. 12221 N b. 12256 N c. 12205 Y d. 12254 13908: Montauk Point Light is 168 feet above what reference level?
N a. Mean low water N b. Mean tide level N c. Ground level Y d. Mean high water 14005: At 0800 your vessel is at mile 110 on the Columbia River. You are steaming in an easterly direction. At 0854 Lady Island Range is in line dead astern and Government Island Upper Range is in line on your port quarter. What speed have you averaged?
N a. 8.1 mph N b. 8.5 mph Y c. 9.4 mph N d. 10.2 mph 14204: The mooring float at Beacon Rock State Park is restricted to pleasure boats and to periods not to exceed __________.
N a. 12 hours N b. 24 hours Y c. 36 hours N d. 48 hours 15243: At 1245 the GPS shows your position to be LAT 41°10.3'N, LONG 72°44.2'W. You are steering a course of 284°T at an engine speed of 13.0 knots. At what time would you expect the New Haven Harbor Outer Range to be in line if you have a current setting 112°T at 1.2 knots?
N a. 1318 Y b. 1323 N c. 1328 N d. 1343 15820: You are northwest of Port Jefferson Harbor steering 242° per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________.
N a. 140°psc N b. 146°psc Y c. 157°psc N d. 160°psc 15938: At 1910 you obtain the following bearings:
Bartlett Reef Light 268°T
Race Rock Light 147°T
Little Gull Island Light 198°T
Which of the following is your position at 1910?
N a. LAT 41°17.4'N, LONG 72°05.6'W N b. LAT 41°17.0'N, LONG 72°07.1'W Y c. LAT 41°16.6'N, LONG 72°04.6'W N d. LAT 41°16.2'N, LONG 72°06.4'W 16064: At 2015, your vessel is at the Chesapeake Bay Bridge and Tunnel midway between buoys "13" and "14". If the height of tide is -1 foot (-.3 meter). What is the approximate depth under the keel?
N a. 51 feet (15.5 meters) Y b. 45 feet (13.6 meters) N c. 40 feet (12.1 meters) N d. 35 feet (10.6 meters) 16363: At 0405, you increase speed and at 0500 your position is LAT 37°06.0'N, LONG 75°41.1'W. What is the approximate depth of water?
N a. 46 feet (13.9 meters) Y b. 54 feet (16.4 meters) N c. 62 feet (18.8 meters) N d. 66 feet (20.0 meters) 16415: You can follow what loran reading between your two positions?
N a. There is no loran reading to follow. N b. 9960-Y-43958 N c. 9960-W-14655 Y d. 9960-X-25982 16457: The coast between Great Machipongo Inlet and Cape Charles is __________.
N a. broken by the mouths of several major rivers Y b. low, with sandy beaches bordered by marsh and woodlands N c. marked by prominent, isolated, barren hills N d. composed of high, rocky bluffs and wooded uplands 16512: At 0748, you take the following bearings:
Watch Hill Point Light bearing 020.5°pgc
Race Point Light Light bearing 269.5°pgc
What is the approximate depth of water at this position?
N a. 325 feet N b. 175 feet Y c. 130 feet N d. 104 feet 16840: Visibility is exceptionally clear. At approximately what distance did Chesapeake Light become visible?
N a. 19.2 miles Y b. 21.0 miles N c. 22.7 miles N d. 24.0 miles