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.
65: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1202 x 84 feet N b. 1200 x 75 feet N c. 1195 x 75 feet Y d. 1190 x 75 feet 258: During twilight on 28 December , about 1800 GMT, in DR position LAT 4°00'N, LONG 0°06'W, the sextant altitude (hs) of Venus was 30°46.8'. The height of eye was 36 feet, and the index error was 2.0' on the arc. The temperature was 68°F. The barometer read 1030 mb. Calculate the observed altitude (Ho).
N a. Ho 30°35.2' N b. Ho 30°37.1' Y c. Ho 30°38.1' N d. Ho 30°40.3' 284: Based on a DR, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone N b. cross a submerged pipeline Y c. depart a regulated area N d. depart a restricted area 360: If you are making 8.3 knots over the ground, what is your ETA at the first turning point in York Spit Channel between buoys "29" and "30"?
Y a. 0522 N b. 0508 N c. 0456 N d. 0448 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 630: You are on a voyage from Corpus Christi, TX, to Fort de France, Martinique. The distance from pilot to pilot is 2190 miles (2521 statute miles). The speed of advance is 15.0 knots. You estimate a layover in Charlotte Amalie, Virgin Islands, of 16.0 hours. If you take departure at 0654 (ZD +6), 27 November, what is your ETA (ZD +4) at Fort de France?
N a. 2054, 3 December N b. 2254, 3 December Y c. 0254, 4 December N d. 2054, 4 December 744: On 22 May , at 0440 ZT, your vessel's DR position is LAT 23°24'N, LONG 110°24'W. At approximately this time, you obtain a sextant altitude (hs) of Polaris reading 23°40.9' with an index error of 1.6' on the arc. Your chronometer reads 11h 42m 14s, and is 2m 36s fast. What is your latitude by Polaris, given a height of eye of 24 feet?
N a. 23°28.6'N N b. 23°30.0'N Y c. 23°31.2'N N d. 23°32.8'N 997: On 20 November , your 0612 zone time (ZT) position was LAT 25°38.0'N, LONG 166°54.0'W. Your vessel was steaming on course 126°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0854 ZT. The chronometer read 07h 51m 14s and was slow 02m 52s. The observed altitude (Ho) was 27°58.3'. LAN occurred at 1147 ZT. The observed altitude (Ho) was 45°35.0'. What was the longitude of your 1147 ZT running fix?
N a. 165°20.2'W N b. 165°18.4'W N c. 165°15.8'W Y d. 165°12.5'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 1107: On 16 April , your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 17°54.9'S, LONG 167°48.7'E N b. LAT 17°55.6'S, LONG 167°45.1'E N c. LAT 17°56.8'S, LONG 167°52.4'E Y d. LAT 18°00.4'S, LONG 167°49.2'E 1128: How far is it to the Hernando Desoto Bridge in Memphis, TN?
N a. 980.8 miles N b. 736.6 miles N c. 312.3 miles Y d. 218.1 miles 1133: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 53.0 feet N b. 62.6 feet N c. 64.2 feet Y d. 68.0 feet 1164: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?
N a. Privately maintained buoys at a yacht club N b. Government buoys marking the Hurricane Point dikes Y c. Barges moored at the Dennis Landing Terminal N d. A pipeline discharging dredge spoil 1209: It is 22 October and you are keeping zone time +4. You are on course 083°T, speed 24 knots. Your 0820 DR position is LAT 26°10.0'N, LONG 52°20.0'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 10h 04m 36s N b. 10h 04m 53s N c. 11h 04m 37s Y d. 11h 08m 54s 1502: On May 20 , you are keeping ZD +4, and your 2300 (ZD +4) DR position is LAT 42°07'N, LONG 81°02'W. At that time, you observe Polaris bearing 012°psc. The chronometer time of the observation is 03h 02m 23s, and the chronometer is 1m 17s fast. The variation is 9.5°W. What is the deviation of the magnetic compass?
Y a. 2.7°W N b. 12.2°W N c. 6.8°E N d. 12.2°E 1658: On 23 August , in DR position LAT 24°07.0'N, LONG 136°16.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 074.5°psc. The chronometer reads 08h 56m 19s and is 02m 34s fast. Variation in the area is 2°W. What is the deviation of the magnetic compass?
N a. 2.5°E N b. 2.8°W Y c. 4.5°E N d. 4.8°W 1909: On 22 March , your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 294°T at an observed altitude (Ho) of 33°02.7'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?
N a. Regulus Y b. Menkar N c. Rigel N d. Alphard 2004: On 28 February , your 1850 zone time DR position is LAT 27°49.0'N, LONG 159°24.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
Y a. Rigel, Schedar, Regulus N b. Sirius, Mirfak, Elnath N c. Hamal, Alkaid, Canopus N d. Bellatrix, Vega, Regulus 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 2126: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?
N a. Privately maintained buoys at a yacht club N b. Government buoys marking the Hurricane Point dikes Y c. Barges moored at the Dennis Landing Terminal N d. A pipeline discharging dredge spoil 2500: You are underway and intend to make good a course of 227°T. You experience a current with a set and drift of 350°T at 2.1 knots, and a northwest wind produces a leeway of 5°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 11 knots. What will be your speed made good over your intended course of 227°T?
N a. 18.5 knots N b. 18.1 knots N c. 17.6 knots Y d. 17.2 knots 2658: You are steering 202°T, and a light is picked up dead ahead at a distance of 14.6 miles at 2234. You change course to pass the light 5 miles off abeam to starboard. If you are making 21 knots, what is your ETA at the position 5 miles off the light?
N a. 2310 Y b. 2313 N c. 2316 N d. 2319 2665: You are on course 079°T, speed 11.2 knots. At 0904 you see a daymark bearing 078°T at a range of 4.6. If you change course at 0910 to leave the daymark abeam to starboard at 0.5 mile, at what time will the daymark be abeam?
N a. 0918 N b. 0923 Y c. 0928 N d. 0935 2674: You are steaming on course 126°T at 14.8 knots. At 1022 you sight a buoy bearing 128°T, at a range of 4.8 miles. If you change course at 1026, what true course will you steer to leave the buoy 0.5 mile abeam to port?
Y a. 136° N b. 133° N c. 122° N d. 119° 2709: If the highest point of your towboat is 54 feet above the water and the Natchez Gage reads 24.8 feet, what will be your vertical clearance when passing under the Natchez-Vidalia westbound Highway Bridge?
N a. 35.9 feet Y b. 47.2 feet N c. 49.6 feet N d. 57.5 feet 3077: If the speed necessary for reaching port at a designated time is 23.7 knots and the pitch of the propeller is 20.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 7% negative slip?
Y a. 108 N b. 112 N c. 116 N d. 124 3313: You have steamed 300 miles and consumed 34 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 700 miles?
Y a. 79.3 tons N b. 74.3 tons N c. 68.4 tons N d. 66.2 tons 3627: Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?
N a. 242°T N b. 244°T N c. 246°T Y d. 248°T 10701: At 0947 your position is LAT 41°15.9'N, LONG 71°41.7'W. You are on course 182° per magnetic compass at 11.3 knots. At 1020 your position is LAT 41°09.2'N, LONG 71°40.6'W. What were the set and drift?
N a. 211°T at 1.0 knot Y b. 229°T at 2.0 knots N c. 058°T at 1.8 knots N d. 043°T at 1.1 knots 10704: At 2038 your position is LAT 41°09.2'N, LONG 71°40.6'W. You are on course 301° per standard magnetic compass at 7.2 knots. At 2152 your position is LAT 41°11.3'N, LONG 71°48.6'W. What were the set and drift?
N a. 080°T at 1.0 knot Y b. 096°T at 2.0 knots N c. 261°T at 1.2 knots N d. 277°T at 0.9 knot 11402: At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?
Y a. 259° at 22.6 knots N b. 245° at 23.1 knots N c. 079° at 22.8 knots N d. 065° at 25.5 knots 11811: What is the true course to steer between Horton Pt. Light and a position 2 miles due south of Branford Reef Light, if the set and drift of the current are 40°T at 1.5 knots, and an easterly wind will cause 3° of leeway? Your engines are making turns for 12 knots.
N a. 277°T N b. 283°T Y c. 287°T N d. 291°T 11905: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive one mile due south of Block Island Southeast Point Light, if you are turning for 8.6 knots, the current is 130° at 1.2 knots, and a northerly wind causes 3° of leeway?
Y a. 061°T N b. 064°T N c. 067°T N d. 070°T 11907: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 130° at 1.2 knots, and a southerly wind causes 3° of leeway?
N a. 112°T Y b. 108°T N c. 105°T N d. 102°T 13302: The shoal spanned by Trestle B of the Chesapeake Bay Bridge and Tunnel is __________.
N a. Chesapeake shoal N b. the Middle ground N c. Lynnhaven roads Y d. the Tail of the Horseshoe 13302: The shoal spanned by Trestle B of the Chesapeake Bay Bridge and Tunnel is __________.
N a. Chesapeake shoal N b. the Middle ground N c. Lynnhaven roads Y d. the Tail of the Horseshoe 15061: Falkner Island Light is shown __________.
N a. 46 feet (13.9 meters) above sea level N b. only from 1 June to 10 October Y c. from a white octagonal tower N d. with a six-second period 15119: What is the height above water of Davis Creek Channel Light "1"?
N a. 6 feet (1.8 meters) Y b. 15 feet (4.6 meters) N c. 17 feet (5.2 meters) N d. 24 feet (7.3 meters) 15345: You are making good a course of 060°T at a speed of 13.5 knots. At 1855 Block Island North Light bears 086°T; at 1910 Block Island North Light bears 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position?
Y a. You are on the edge of a cable area. N b. The bottom is mud, sand, and clay. N c. The wavy magenta lines to the north through east of your position are designated lobstering areas. N d. You are inside the 120 fathom curve 15407: At 1430, your position is LAT 37°12.8'N, LONG 76°17.7'W. At this time, you come left and steer 045°T. This course will lead you through a channel bordered by yellow buoys. The dashed magenta lines between the buoys mark __________.
N a. York River Entrance Channel N b. New Point Comfort shoal area N c. the piloting channel for Mobjack Bay Y d. the limits of fish trap areas 15641: You will pass through the Race at approximately the time of maximum ebb current. As you APPROACH the Race from New London, you will be set __________.
Y a. to the left of the track line N b. to the right of the track line N c. forward along the track line N d. towards New London along the track line 15656: At 0630, Buoy "PI" is close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 210°pgc and Race Rock Light is bearing 075°pgc. What is your 0654 position?
N a. LAT 41°19.0'N, LONG 72°05.2'W N b. LAT 41°14.4'N, LONG 71°54.6'W N c. LAT 41°14.2'N, LONG 72°06.8'W Y d. LAT 41°14.0'N, LONG 72°05.3'W 15658: What course should you steer by the standard magnetic compass in order to maintain a heading of 081°pgc?
N a. 062°psc N b. 080°psc N c. 090°psc Y d. 095°psc 15858: At 0005, on 26 January, your position is LAT 41°11.8'N,
LONG 72°20.5'W. From this position, you plot a course to a position one mile North of Mattituck Breakwater Light "MI". If there are no set and drift, what course should you steer per gyro compass?
N a. 219°pgc Y b. 222°pgc N c. 225°pgc N d. 228°pgc 16114: As you pass through the Chesapeake Bay Bridge and Tunnel,
you sight Trestle "A" in line bearing 198°pgc. What is the gyro error?
N a. 2°E N b. 0°E Y c. 2°W N d. 4°W 16239: From your 2045 position, you set a course to pass 1.5 miles due east of the charted position of Hog Island Lighted Bell Buoy "12". The known set and drift in the area are 068°T at 3 knots. What is the course to steer, with no change in engine speed, to make good your desired course?
Y a. 200°T N b. 203°T N c. 206°T N d. 209°T