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.
51: As you approach Anconia Pt. Light (mile 528.6 AHP), which type of dayboard would you see on the light structure?
N a. Green diamond Y b. Green square N c. Red square N d. Red diamond 53: What are the dimensions of Old River Lock, on the Lower Mississippi River?
Y a. 1190 feet x 75 feet N b. 1045 feet x 75 feet N c. 760 feet x 75 feet N d. 425 feet x 75 feet 161: At 1923, on September 21, you pass Bixby Towhead Light (mile 873.7 AHP). What was your average speed since leaving Cairo?
N a. 12.1 mph Y b. 11.3 mph N c. 10.5 mph N d. 9.2 mph 220: From your 1715 fix, you steer 214°T at 12 knots. At 1800,
you take the following bearings:
Chesapeake Light bearing 175°pgc
Cape Henry Light bearing 239°pgc
Cape Charles Light bearing 293°pgc
Your 1800 position is __________.
N a. LAT 37°02.7'N, LONG 75°42.7'W Y b. LAT 37°02.9'N, LONG 75°43.1'W N c. LAT 37°03.0'N, LONG 75°43.3'W N d. LAT 37°03.1'N, LONG 75°42.8'W 329: The engineer has advised that it will be necessary to secure the gyrocompass and the electronic equipment. From your 0315 position, what is your course per standard magnetic compass to York Spit Channel Buoy "38", if there is no current?
N a. 218°psc Y b. 216°psc N c. 214°psc N d. 212°psc 375: As you near Little Gull Island, you use your loran to insure that you do not come within 0.5 mile of the island. Which of the following loran readings will act as a danger line and keep you off Little Gull Island by a minimum of 0.5 mile?
N a. Not less than 9960-W-14735.8 N b. Not more than 9960-W-14735.9 Y c. Not less than 9960-Y-43953.5 N d. Not more than 9960-X-26149.0 496: At 0815, you change course to 079°T and head for the entrance of Great Salt Pond on Block Island. To compensate for a northerly wind, you estimate a 5° leeway is necessary. What course should you steer per gyrocompass to make good 079°T?
Y a. 071°pgc N b. 074°pgc N c. 076°pgc N d. 079°pgc 506: At 0112, what is the approximate depth under the keel?
N a. 57 feet (17.3 meters) N b. 51 feet (15.5 meters) N c. 47 feet (14.2 meters) Y d. 38 feet (11.5 meters) 525: At 0600 you take the following bearings:
Point Judith Light bearing 063° pgc
Block Island North Reef Light bearing 144° pgc
What is your 0600 position?
Y a. LAT 41°18.3'N, LONG 71°38.7'W N b. LAT 41°18.4'N, LONG 71°38.0'W N c. LAT 41°18.5'N, LONG 72°38.1'W N d. LAT 41°18.7'N, LONG 71°38.9'W 547: At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 100°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 267°pgc Y b. 263°pgc N c. 255°pgc N d. 250°pgc 658: You are planning a voyage by great circle from LAT 59°00'N, LONG 07°00'W via LAT 38°00'N, LONG 61°30'W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. You are to the east of the Northern Hemisphere vertex. N b. When plotted on a Mercator chart the track line will be concave to Cape Farwell (Kap Farvel). Y c. All courses are in the southwest quadrant of the compass. N d. Distance is measured by using the length of a degree of latitude at the midpoint of the track line. 751: On 16 July , at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant reads 26°57.5'. Your chronometer reads 05h 59m 16s, and your chronometer error is 01m 28s slow. Your height of eye is 48 feet, and the index error for your sextant is 1.3' off the arc. What is the latitude of your vessel from your observation of Polaris?
N a. 26°52.1'N N b. 26°58.8'N Y c. 27°36.1'N N d. 27°43.4'N 810: On 13 October , your 0515 zone time (ZT) fix gives you a position of LAT 26°53.0'N, LONG 90°05.0'W. Your vessel is on course 068°T, and your speed is 7.8 knots. Local apparent noon (LAN) occurs at 1145 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 54°51.5'. What is the calculated latitude at LAN?
Y a. 27°12.6'N N b. 27°14.1'N N c. 27°15.7'N N d. 27°16.2'N 824: On 30 October , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1144 ZT. Your DR position is LAT 22°42.0'S, LONG 137°16.0'W, and your sextant altitude (hs) is 80°59.4'. The index error is 2.5' off the arc, and your height of eye is 42.5 feet. The chronometer time of the observation is 08h 46m 15s, and the chronometer error is 02m 12s fast. Find the latitude at meridian transit from the ex-meridian observation.
Y a. LAT 22°31.4'S N b. LAT 22°42.3'S N c. LAT 22°46.2'S N d. LAT 23°00.9'S 987: On 17 January , your 0730 zone time fix gives you a position of LAT 22°26.0'S, LONG 152°17.0'E. Your vessel is steaming on a course of 116°T at a speed of 17 knots. An observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 00h 13m 23s, and the chronometer error is 01m 49s slow. The observed altitude (Ho) is 66°02.1'. LAN occurs at 1152 zone time and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 87°54.2'. Determine the vessel's 1200 zone time position.
Y a. LAT 22°53.8'S, LONG 153°25.6'E N b. LAT 22°53.8'S, LONG 153°28.8'E N c. LAT 22°56.3'S, LONG 153°25.6'E N d. LAT 22°56.3'S, LONG 153°28.8'E 1192: On 3 October , your 0830 ZT position is LAT 26°15.0'S, LONG 73°16.0'E. Your vessel is on course 280°T at a speed of 19.0 knots. What is the ZT of local apparent noon (LAN)?
N a. 1151 N b. 1154 N c. 1158 Y d. 1201 1480: On 28 November , your vessel's 0712 zone time DR position is LAT 26°54'S, LONG 45°18'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information.
Chronometer time: 10h 09m 18s Chronometer error: slow 02m 54s Gyro bearing: 102°
N a. 1.7°W Y b. 0.6°W N c. 1.1°E N d. 0.8°E 1501: On 3 October , your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronometer time of the observation is 08h 32m 04s, and the chronometer is 0m 27s slow. The variation is 5.5°W. What is the gyro error?
N a. 7.5°E N b. 5.0°E N c. 3.5°E Y d. 2.0°E 1651: On 23 October , in DR position LAT 21°13.0'N, LONG 152°18.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 259°psc. The chronometer reads 07h 21m 46s and is 01m 32s slow. Variation in the area is 5°E. What is the deviation of the magnetic compass?
N a. 0.9°E N b. 1.5°W Y c. 5.9°W N d. 6.5°E 1706: The highest point on your towboat is 53 feet above the water, and the Helena Gage (mile 663 AHP) reads 3.9 feet. What is the vertical clearance when you pass under the B-span of the Helena Highway Bridge in Helena?
N a. 59.9 feet Y b. 62.5 feet N c. 64.1 feet N d. 65.5 feet 1870: On 12 June , your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 313°T at a sextant altitude (hs) of 14°56.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
Y a. Menkalinan N b. Mirzam N c. Theta Aurigae N d. Alnitak 2003: On 20 June , your 1742 zone time DR position is LAT 24°55.0'S, LONG 8°19.6'E. Considering their magnitude, azimuth, and altitude, which three stars are best suited for a fix at star time?
Y a. Regulus, Canopus, Antares N b. Spica, Arcturus, Alioth N c. Arcturus, Achernar, Pollux N d. Avior, Sabik, Fomalhaut 2424: As you approach mile 225 AHP, you notice on the map a brown broken-lined rectangular shaped area along the bank. This indicates __________.
N a. weirs N b. a revetment Y c. a fleeting area N d. utility crossing 2660: You are steering 287°T, and a light is picked up dead ahead at a distance of 19.4 miles at 0419. You change course to pass the light 4 miles off abeam to starboard. If you are making 13 knots, what is your ETA at the position 4 miles off the light?
N a. 0541 N b. 0544 Y c. 0547 N d. 0550 2662: You are on course 006°T, speed 16.6 knots. At 0516 you see a light bearing 008°T at a range of 10.2. If you change course at 0528 to leave the light abeam to port at 1.0 mile,
at what time will the light be abeam?
Y a. 0553 N b. 0556 N c. 0604 N d. 0607 2703: You are underway on course 254°T at a speed of 16.5 knots. You sight a rock bearing 255°T at a radar range of 6.1 miles at 0916. If you change course at 0922, what is the course to steer to leave the rock abeam to starboard at 1.5 miles?
N a. 268°T N b. 239°T Y c. 236°T N d. 233°T 2857: Your vessel is on a course of 253°T at 18 knots. At 2027 a light bears 275.5°T, and at 2055 the light bears 298°T.
At what time and at what distance off will your vessel be when abeam of the light?
Y a. 2115, 5.9 miles N b. 2109, 6.4 miles N c. 2123, 7.3 miles N d. 2104, 7.7 miles 3066: The observed noon to noon run for a 24 hour period is 489 miles. The average RPM for the day was 95. The pitch of the wheel is 22.5 feet. What is the slip of the wheel?
N a. +3.2% Y b. +3.4% N c. +3.7% N d. +3.9% 3088: If the pitch of the propeller is 21.5 feet, and the revolutions per day are 96,666, calculate the day's run allowing 9% negative slip.
N a. 311.1 miles N b. 341.8 miles N c. 357.9 miles Y d. 372.6 miles 3284: While steaming at 18.9 knots, your vessel consumes 386 barrels of fuel oil per day. In order to reduce consumption to 251 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 11.6 knots N b. 12.3 knots N c. 15.2 knots Y d. 16.4 knots 3295: Your vessel consumes 178 barrels of fuel per day at a speed of 13.5 knots. What will be the fuel consumption of your vessel at 15.0 knots?
N a. 172 bbls N b. 198 bbls N c. 219 bbls Y d. 244 bbls 3752: While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyro compass and the charted value of the range of lights is 359°T, what is the gyro compass error?
Y a. 2°W N b. 2°E N c. 1°E N d. 1°W 11106: What is the height of the tide at Great Salt Pond, on Block Island, at the morning high water (daylight savings time) on 1 July 1983?
N a. 1.3 feet Y b. 2.3 feet N c. 3.2 feet N d. There is no morning high water 11109: What is the velocity of the maximum ebb current approximately 1.1 miles ENE of Little Gull Island in the afternoon of 25 April 1983?
Y a. 5.5 knots N b. 4.7 knots N c. 4.2 knots N d. 1.3 knots 13004: At 1815 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT 41°13.3'N, LONG 72°10.8'W)?
N a. 2019 N b. 2028 Y c. 2032 N d. 2038 13303: You are considering anchoring approximately three miles northeast of Chesapeake Light. After examining the chart you decide not to because of the __________.
N a. large number of wrecks N b. coral being designated as a special protected area Y c. danger of unexploded mines N d. area being designated as a National Marine Sanctuary 13810: Which chart would you use if you planned to continue westward beyond the coverage of this chart?
Y a. 12363 N b. 12373 N c. 13205 N d. 13218 13906: When approaching Block Island Sound from Long Island Sound, you will enter waters governed by the International Rules of the Road when you __________.
Y a. pass through The Race N b. cross the territorial sea boundary N c. exit Block Island Sound to the east or south N d. None of the above, as Long Island Sound is governed by the International Rules of the Road 14004: At 1745 Lady Island Upper Range is in line dead astern and Washougal Lower Range is in line on the starboard bow. You are steaming in an easterly direction. What speed must you average to arrive abeam of Cape Horn Light No. 67 at 1839?
N a. 9.3 mph N b. 9.8 mph Y c. 10.2 mph N d. 10.8 mph 15108: Your 1752 position places you __________.
Y a. less than 0.5 mile westward of York Spit Channel N b. less than 0.5 mile eastward of York Spit Channel N c. greater than 0.5 mile westward of York Spit Channel N d. greater than 0.5 mile eastward of York Spit Channel 15110: From your 1752 position, you steer 307°pgc at 9 knots. At 1805, you obtain the following visual bearings:
Old Pt. Comfort Light 232°pgc.
Chesapeake Bay Tunnel North Light 130°pgc.
What are the latitude and longitude of you 1805 position?
N a. LAT 37°06.1'N, LONG 76°08.1'W N b. LAT 37°06.0'N, LONG 76°08.4'W N c. LAT 37°05.9'N, LONG 76°07.7'W Y d. LAT 37°05.9'N, LONG 76°08.0'W 15215: At 2015, you alter course to 154°pgc. What is the course per standard magnetic compass (psc)?
Y a. 162°psc N b. 157°psc N c. 152°psc N d. 142°psc 15508: From your position you observe a rotating white and green light to the north. This light is most likely __________.
N a. from a submarine on the surface N b. the light at Southeast Point Y c. at an airport N d. on a coastal patrol vessel 15640: At which point in the voyage is your vessel bound by the International Rules of the Roads (COLREGS)?
N a. At the mouth of New London Harbor Y b. Upon entering Block Island Sound N c. After crossing the line of the Territorial Sea N d. After passing between Montauk Point and Lewis Point on Block Island 15665: Which action should you take to compensate for the above current?
N a. Continue on the same course and speed. Y b. Alter your course to the left. N c. Slow to 8.5 knots. N d. Alter your course to the right. 15723: What daymark should you see as you approach Parker Landing Light (mile 924.6 AHP)?
N a. Green square N b. Green triangle N c. Red and green rectangle Y d. Green diamond 15862: At 0125, you change course to make good 280°T. What is the course per standard magnetic compass?
N a. 290°psc Y b. 292°psc N c. 294°psc N d. 296°psc 15864: At 0200, you take the following bearingss:
Mattituck Inlet Light bearing 125°pgc
Falkner Island Light bearing 355°pgc
What is the position of your 0200 fix?
Y a. LAT 41°03.9'N, LONG 72°38.9'W N b. LAT 41°03.8'N, LONG 72°39.1'W N c. LAT 41°03.7'N, LONG 72°38.5'W N d. LAT 41°03.5'N, LONG 72°38.8'W 15943: At 2038 Block Island North Light bears 065°T and Montauk Point Light bears 216°T
Which statement is TRUE?
N a. Your speed made good between your 1959 fix and 2038 fix is 11.0 knots. N b. Your course made good between your 1959 fix and 2038 fix is 102°T. N c. At your 2038 fix, your vessel is governed by the Inland Rules of the Road. Y d. Block Island Sound South Entrance Obstruction Lighted "BIS"
Buoy is located 3.6 miles off your starboard bow.16245: At 2259 Cape Henry Light bears 250°T, Chesapeake Light bears 122°T, and North Chesapeake Entrance Lighted Whistle Buoy "NCA" has a radar range of 1.8 miles. Which statement is TRUE?
N a. The course made good is 226°T. N b. You are in the red sector of Cape Henry Light. N c. You are in a submerged submarine transit lane. Y d. Chesapeake Light is 7.6 miles off. 16263: If you increase speed to 8 knots, and the current is 240°
at 0.7 knot. What course should you steer from your 0400 position to arrive at point A?
N a. 178°T N b. 180°T Y c. 183°T N d. 186°T 16411: You get underway at 1030. The wind is out of the SSE and you estimate 3° leeway. What course should you steer per gyrocompass to make good a desired course of 075°T?
N a. 074°pgc N b. 076°pgc N c. 078°pgc Y d. 080°pgc 16414: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1157 N b. 1208 Y c. 1215 N d. 1219 16739: What is the earliest time you should sight Montauk Point Light (nominal range - 24 miles) if you are turning for 9.2 knots? Visibility is 5 nautical miles.
Y a. The light is visible at 2212 N b. 2221 N c. 2243 N d. You will not sight the light on this course.