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.
126: What is your clearance as you pass under the Vicksburg Highway 80 Bridge (mile 437.8 AHP). if the Vicksburg Gage reads 14.8 feet and the highest point on your tow boat is 44.5 feet?
N a. 36 feet N b. 42 feet Y c. 57 feet N d. 66 feet 257: 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 110°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 252°pgc N b. 257°pgc N c. 265°pgc Y d. 271°pgc 285: At 1845, you plot the following bearing lines:
Old Plantation Flats Light bearing 251°true
New Point Comfort Light bearing 335°true
Your latitude is __________.
N a. 37°10.7'N N b. 37°10.9'N Y c. 37°11.2'N N d. 37°11.6'N 426: The broken magenta line which runs parallel to the shore between Roanoke Point and Mattituck Inlet marks a __________.
Y a. fish trap area N b. pipeline N c. demarcation line N d. cable area 504: At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?
N a. _ . N b. _ _ N c. . . Y d. . _ 578: At 1008, you are entering York Spit Channel and buoy "19" is abeam to your starboard. What speed are you making good?
N a. 9.9 knots N b. 9.7 knots Y c. 9.0 knots N d. 8.4 knots 606: At 0915 zone time, on 11 May , you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 19.5 knots. The distance is 4,276 miles. What is your estimated zone time of arrival at Seattle?
Y a. 1932, 19 May N b. 0332, 20 May N c. 1032, 20 May N d. 1232, 20 May 659: You are planning a voyage from LAT 48°30'N, LONG 125°00'W to Korea via LAT 48°30'N, LONG 153°00'E. Which of the following track lines would you select for the safest and most direct route? (Use gnomonic tracking chart WOXZC 5270)
N a. Parallel sailing along 48°30'N N b. Great circle track line between the two points Y c. Great circle to LAT 51°00'N, LONG 178°00'W, parallel sailing for 80 miles, then great circle to the via point N d. Rhumb line track between the two points 750: On 28 October , at 1754 ZT, your vessel's DR position is LAT 28°30'N, LONG 63°24'W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28°42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?
N a. 28°25.2'N N b. 28°30.6'N Y c. 28°34.9'N N d. 28°41.3'N 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 994: At 0600 zone time, on 16 March , your DR position is LAT 20°10.0'N, LONG 81°30.0'W. You are steering course 300°T. The speed over the ground is 10 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix? NP-0004
N a. LAT 20°28.5'N, LONG 82°12.6'W N b. LAT 20°32.0'N, LONG 82°16.4'W Y c. LAT 20°39.0'N, LONG 82°22.9'W N d. LAT 20°42.5'N, LONG 82°26.2'W 1021: On 30 March , your 0145 DR position is LAT 29°30'S, LONG 122°45'E. You are on course 055°T at a speed of 22 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 28°24.6'S, LONG 124°21.4'E Y b. LAT 28°39.9'S, LONG 124°18.6'E N c. LAT 28°41.5'S, LONG 124°41.5'E N d. LAT 29°20.1'S, LONG 123°41.0'E 1092: On 3 April , your vessel's 1400 ZT DR position is LAT 20°08.0'N, LONG 147°45.0'W. You are steering course 023°T at 18.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. NP-0022
N a. LAT 21°39.8'N, LONG 146°59.7'W Y b. LAT 21°40.0'N, LONG 147°03.2'W N c. LAT 21°41.8'N, LONG 147°05.5'W N d. LAT 21°41.8'N, LONG 147°01.5'W 1197: On 16 November , your 0800 ZT DR position is LAT 25°11.0'N, LONG 117°41.0'W. Your vessel is on a course of 252°T at a speed of 14.5 knots. What is the ZT of local apparent noon (LAN)?
N a. 1135 Y b. 1139 N c. 1143 N d. 1146 1288: What is NOT true about the yellow square at mile 227.3 AHP?
N a. Yellow in color N b. Square in shape Y c. Lighted N d. Part of Intracoastal Waterway System 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 1660: On 23 June , in DR position LAT 21°39.0'S, LONG 106°28.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 078°psc. The chronometer reads 02h 14m 39s and is 01m 43s slow. Variation in the area is 9°W. What is the deviation of the standard magnetic compass?
N a. 2.8°E N b. 3.9°W Y c. 4.3°W N d. 4.6°E 1670: On 10 August , your vessel's 0426 zone time DR position is LAT 52°07'N, LONG 142°16'E, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 074.5° per standard compass. Variation in the area is 12°W. The chronometer reads 07h 24m 19s and is 02m 34s fast. Which of the following is the deviation of the standard compass?
N a. 0.0° N b. 1.3°W Y c. 1.3°E N d. 2.3°W 1738: Which of the following statements regarding aids to navigation shown in the Corps. of Engineers map book is TRUE?
Y a. Buoys should always be given as wide a berth in passing as possible. N b. The U.S. Army Corps.. of Engineers is responsible for placing and maintaining all aids to navigation. N c. Buoy positions as shown on the chart are exact. N d. Lights and daymarks are always shown in their exact location. 1833: What are the dimensions of the Port Allen Lock at Baton Rouge, LA?
N a. 75 feet x 1188 feet N b. 84 feet x 1180feet Y c. 84 feet x 1188 feet N d. 75 feet x 1180 feet 2018: On 11 November , your 0200 zone time DR position is LAT 26°32'S, LONG 154°16'E. You are on course 058°T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Polaris, Regulus, Rigel N b. Jupiter, Spica, Canopus N c. Saturn, Peacock, Rigel Y d. Mars, Betelgeuse, Miaplacidus 2110: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?
N a. 38.5 feet (11.7 meters) N b. 43.5 feet (13.2 meters) N c. 51.0 feet (15.5 meters) Y d. 59.5 feet (18.0 meters) 2121: At 1337 ZT, on July 17, , in DR position LAT 30° 56.8' S, LONG 039° 36.5' W, you observe an amplitude of the Moon. The upper limb of the moon is on the visible horizon, bearing 263.0°psc. The variation is 20°W. What is the deviation?
N a. 2.6°E N b. 2.6°W Y c. 3.6°E N d. 3.6°W 2208: What is the total length of the trip?
N a. 906.3 miles Y b. 922.3 miles N c. 1155.8 miles N d. 1187.3 miles 2664: You are on course 061°T, at a speed of 12.4 knots. At 0839 you see a rock bearing 059°T at a range of 4.4 miles. If you change course at 0845 to leave the rock abeam to starboard at 1.5 mile, at what time will the rock be abeam?
N a. 0854 Y b. 0859 N c. 0903 N d. 0906 3279: While steaming at 15.0 knots, your vessel consumes 326 barrels of fuel oil per day. In order to reduce consumption to 178 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 8.1 knots N b. 8.5 knots N c. 11.1 knots Y d. 12.2 knots 3300: You have steamed 156 miles and consumed 19 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 273 miles?
N a. 23.6 tons N b. 27.9 tons Y c. 33.3 tons N d. 37.2 tons 3630: You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 183°psc Y b. 189°psc N c. 210°psc N d. 223°psc 3641: You desire to make good a true course of 174°. The variation is 17°W, magnetic compass deviation is 4°W, and gyrocompass error is 4°E. A west-southwest wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 195°psc N b. 197°psc Y c. 199°psc N d. 203°psc 3647: The true course between two points is 220°. Your gyrocompass has an error of 1°E. You make an allowance of 1° leeway for a north-northwest wind. What gyro course should be steered to make the true course good?
Y a. 220°pgc N b. 221°pgc N c. 222°pgc N d. 223°pgc 4009: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a true heading of 187°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320°
N a. 1.5°W Y b. 0.5°W N c. 0.0° N d. 1.0°E 11503: At 1016 your GPS position is LAT 41°07.6'N, LONG 71°37.9'W. At 1104 your position is LAT 41°00.2'N, LONG 71°29.4'W. What was the true course made good between the two positions?
N a. 134°T Y b. 139°T N c. 143°T N d. 145°T 13007: Your 1600 position is LAT 41°08.0'N, LONG 72°44.8'W. You are making turns for 10 knots. What is your ETA at Twenty-Eight Foot Shoal Lighted Buoy "TE" (LAT 41°09.3'N LONG 72°30.5'W)?
N a. 1647 N b. 1651 N c. 1702 Y d. 1706 13406: You are planning to anchor your vessel at LAT 41°01.1'N, LONG 73°02.8'W. What type of bottom should you expect at this position?
N a. Gray sand N b. Soft mud Y c. Gray mud N d. Hard sand 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 15039: At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206° true and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?
N a. 0750 N b. 0754 Y c. 0758 N d. 0802 15145: At 2357 your position is 41°09.0'N, 71°47.0'W and Montauk Point Light bears 216° true. You change to a course of 293° true and your speed is 14.5 knots. At 0012 Montauk Point Light bears 177° true. Which statement about your 0012 running fix is TRUE?
N a. You are being set to the north. Y b. The fathometer reading is about 14 fathoms. N c. You are governed by the Inland Rules of the Road. N d. The fathometer trace shows you passed over the 89 foot sounding. 15211: You have just passed York River Entrance Channel Lighted Buoys "13" and "14". The chart shows a light approximately 1.0 mile off your port beam with a light characteristic "Fl 6 sec". What is the name of this light?
N a. Mobjack Bay Entrance Light N b. New Point Comfort Shoal Light Y c. York Spit Light N d. York River Entrance Channel Light "1" 15669: The area between Block Island and Montauk Point that is bounded by dashed magenta lines is a __________.
N a. naval exercise area N b. fish trap area Y c. submerged cable area N d. restricted navigation area 15825: What is the vertical clearance between the highest point of your towboat, if it is 58 feet above the water, and if the Natchez Gage reads 28.13 feet when passing under the Natchez Upper Highway Bridge?
N a. 15.9 feet N b. 33.2 feet Y c. 39.9 feet N d. 45.4 feet 15944: From your 2038 position you change course to 104°T and increase engine speed to 18 knots. If you make good this course and speed, at what time will Southwest Ledge Lighted Bell Buoy "2" bear 157°T?
N a. 2047 Y b. 2052 N c. 2056 N d. 2101 16257: If your engines turn for 6.5 knots, and you encounter a 0.5 knot southerly current after weighing anchor. What is your ETA at point A?
N a. 0511 N b. 0501 Y c. 0450 N d. 0440 16264: Which statement about your 0400 position is true?
N a. You are governed by the Inland Rules of the Road. N b. Anchoring, trawling and fishing are prohibited. N c. The ocean floor is composed of shingle. Y d. You are within the Territorial Sea and the contiguous zone. 16408: You estimate that you are making 9.3 knots over the ground.
At what time will you enter waters governed by the COLREGS?
N a. 0247 Y b. 0251 N c. 0255 N d. 0258 16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?
Y a. 194°psc N b. 190°psc N c. 187°psc N d. 180°psc 16543: Based on the information in the previous question, what is your ETA at the distress scene?
N a. 0006 N b. 0010 Y c. 0016 N d. 0021 16619: The shoreline along Rocky Point should give a good radar return because __________.
N a. the lookout tower is marked with radar reflectors N b. of offshore exposed rocks N c. submerged reefs cause prominent breakers Y d. the shore is bluff and rocky 16639: You estimate the current to be 125° at 0.6 knot, and the wind is westerly causing 3° of leeway. What course should you steer per gyro compass to make good 347°T while turning for 12.5 knots?
Y a. 340° pgc N b. 343° pgc N c. 346° pgc N d. 349° pgc