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.
120: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 5.5 mph Y b. 6.0 mph N c. 8.0 mph N d. 11.0 mph 276: At 1200, your position is 2.0 miles southwest of Bartlett Reef Light. Your heading is 075°T. Visibility is less than 0.2 mile in fog and rain. Which of the following signals is most likely to be from another vessel?
N a. Whistle from 125° relative N b. Bell from 350° relative Y c. Whistle from 075° relative N d. Horn from 330° relative 368: You will enter waters governed by the International Rules when __________.
N a. you cross the territorial sea boundary line N b. abeam of buoy "CBJ" Y c. Cape Charles Light bears 022°T N d. you cross the boundary of the contiguous zone 416: A vessel at LAT 18°54'N, LONG 73°00'E, heads for a destination at LAT 13°12'N, LONG 54°00'E. Determine the true course and distance by Mercator sailing.
N a. 247°T, 1161 miles N b. 250°T, 1172 miles Y c. 253°T, 1154 miles N d. 256°T, 1136 miles 462: Determine the great circle distance and initial course from LAT 12°45.2'N, LONG 124°20.1'E to LAT 33°48.8'N, LONG 120°07.0'W.
Y a. 6185.9 miles, 050.3°T N b. 6231.3 miles, 309.7°T N c. 6248.0 miles, 048.3°T N d. 6382.0 miles, 311.7°T 475: The great circle distance from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E is 4559 miles and the initial course is 121°T. Determine the latitude of the vertex.
N a. 44°29.1'S Y b. 45°30.9'S N c. 46°18.2'S N d. 43°41.8'S 515: You depart LAT 50°06.0'N, LONG 153°06.0'E and steam 879 miles on course 090°. What is the LONG of arrival?
Y a. 175°56.0'E N b. 177°24.0'E N c. 178°36.0'W N d. 175°04.0'W 564: Horton Point Light __________.
N a. is 14 feet above sea level N b. has a fixed green light Y c. is shown from a white square tower N d. is synchronized with a radio beacon 1008: On 27 March , your 0730 zone time position is LAT 28°16'N, LONG 56°37'W. Your vessel is on course 158°T at a speed of 15.0 knots. An observation of the Sun's lower limb is made at 0915 zone time. The chronometer reads 01h 14m 11s, and the chronometer error is 00m 53s slow. The observed altitude (Ho) is 45°10.7'. LAN occurs at 1150 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 65°32.8'. Determine the vessel's 1200 zone time position.
Y a. LAT 27°08.8'N, LONG 56°04.2'W N b. LAT 27°08.8'N, LONG 56°10.3'W N c. LAT 27°11.6'N, LONG 56°04.2'W N d. LAT 27°11.6'N, LONG 56°10.3'W 1196: On 14 October your 0800 zone time (ZT) dead reckoning position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 knots. What is the ZT of local apparent noon (LAN)?
N a. 1148 N b. 1151 Y c. 1156 N d. 1202 1252: On 13 August , your 0345 ZT DR position is LAT 21°35.0'
N, LONG 135°26.0'W. You are on course 052°T at a speed of 14 knots. What will be the zone time of sunrise at your vessel?
N a. 0443 N b. 0449 Y c. 0536 N d. 0540 1453: On 15 October , your 0325 zone time DR position is LAT 26°51.0'N, LONG 138°17.0'W. At that time, you observe Canopus bearing 167°pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2°E. What is the gyro error?
Y a. 1.3°W N b. 3.2°W N c. 3.2°E N d. 4.1°W 1482: On 20 July , your vessel's 1626 zone time DR position is LAT 27°13.0'N, LONG 63°42.0'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information.
Chronometer time: 08h 24m 18s Chronometer error: slow 02m 12s Gyro bearing: 279.3°
Variation: 15°W
Y a. 1.9°W N b. 2.6°W N c. 1.4°E N d. 2.6°E 1494: On 5 August , your 0310 ZT position is LAT 09°02'N, LONG 21°08'W. You observe Polaris bearing 002°pgc. At the time of the observation the helmsman noted that he was heading 316°pgc and 329°psc. The variation is 15°W. What is the deviation for that heading?
N a. 0.0° N b. 1.5°W N c. 3.0°W Y d. 0.5°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 1681: On 8 December , in DR position LAT 21°56.1'S, LONG 17°21.6'E you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 240.5°psc. The chronometer reads 05h 27m 21s and is 00m 47s fast. Variation in the area is 3.3°E. What is the deviation of the standard magnetic compass?
N a. 1.5°W N b. 0.3°W N c. 0.6°E Y d. 1.5°E 1701: The latest available information on the channel conditions above Baton Rouge that includes the latest buoy information, as well as recommended courses, is found in the __________.
N a. Corps. of Engineers maps N b. Waterways Journal Y c. Local Notice to Mariners N d. Sailing Directions 1733: What are the dimensions of the channel maintained at Baton Rouge, LA?
N a. 30 feet x 300 feet N b. 40 feet x 300 feet Y c. 45 feet x 500 feet N d. 30 feet x 500 feet 1831: You pass Warnicott Bar Lt. at 1146, 24 May. What is your ETA off the Mhoon Landing Gage if you average 6.5 mph?
N a. 0152, 26 May N b. 0426, 26 May Y c. 1528, 26 May N d. 0909, 27 May 1854: On 22 July , your 1759 ZT DR position is LAT 24°50.2'S, LONG 05°16.0'E. You observe an unidentified star bearing 231°T, at an observed altitude (Ho) of 26°10.0'. The chronometer reads 06h 01m 31s and is 02m 15s fast. What star did you observe?
N a. Acamar N b. Capella N c. Miaplacidus Y d. Suhail 1891: On 22 July , your 1759 DR position is LAT 24°50.2'S, LONG 005°16.0'E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?
N a. Regulus N b. Antares Y c. Miaplacidus N d. Suhail 1892: On 22 July , your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 091°T at an observed altitude (Ho) of 64°35.2'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?
Y a. Hamal N b. Rigel N c. Menkar N d. Acamar 1963: Which of the following statements are TRUE?
N a. Oil well structures are listed in the Light List. N b. All aids to navigation with lights have lateral significance. Y c. On the Western Rivers, crossing marks may exhibit white lights. N d. All of the above. 1963: Which of the following statements are TRUE?
N a. Oil well structures are listed in the Light List. N b. All aids to navigation with lights have lateral significance. Y c. On the Western Rivers, crossing marks may exhibit white lights. N d. All of the above. 2011: On 3 February , your 0547 zone time DR position is LAT 24°18.5'N, LONG 167°25.0'E. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
Y a. Regulus, Deneb, Antares N b. Altair, Saturn, Regulus N c. Arcturus, Kochab, Venus N d. Jupiter, Denebola, Regulus 2029: As you approach mile 659 AHP, you notice on the map a dashed line crossing the river at mile 659.9 AHP. This line indicates __________.
N a. ferry crossing N b. submarine crossing Y c. power lines N d. gas pipelines 2106: 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 steer to a point one half mile north of Mattituck Breakwater Light "MI" with an engine speed of 9.0 knots. If there are no set and drift, what course should you steer?
N a. 207°psc N b. 213°psc N c. 220°psc Y d. 235°psc 2119: At 1622 ZT, on 15 June , in DR position LAT 10° 15.2' N, LONG 135° 10' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon, bearing 101.2°psc. The variation is 5° E. What is the deviation?
Y a. 1.5°E N b. 1.5°W N c. 0.5°E N d. 0.5°W 2320: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?
N a. 48.0 feet Y b. 53.2 feet N c. 68.2 feet N d. 116.0 feet 2689: You are steering 107°T, and a light is picked up dead ahead at a distance of 11 miles at 0847. You change course to leave the light 3 miles off to starboard. If you are making 15.5 knots, what is your ETA at the position 3 miles off the light?
Y a. 0928 N b. 0931 N c. 0934 N d. 0937 3093: If the pitch of the propeller is 23.2 feet, and the revolutions per day are 94,910, calculate the day's run allowing 11% negative slip.
N a. 322.3 miles N b. 362.3 miles N c. 382.0 miles Y d. 402.0 miles 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 3277: While steaming at 12.3 knots, your vessel burns 168 bbls of fuel per day. What will be the rate of fuel consumption if you increase speed to 13.5 knots?
N a. 192 bbls/day N b. 204 bbls/day Y c. 222 bbls/day N d. 238 bbls/day 3467: You are underway on course 160°T at 10 knots. The current is 210°T at 0.9 knots. What is the speed being made good?
Y a. 10.7 knots N b. 11.0 knots N c. 11.6 knots N d. 12.3 knots 3649: The true course between two points is 078°. Your gyrocompass has an error of 2°E. You make an allowance of 3° leeway for a north wind. What gyro course should be steered to make the true course good?
Y a. 073°pgc N b. 075°pgc N c. 077°pgc N d. 079°pgc 10508: At 0919 your position is LAT 37°00.0'N, LONG 75°30.0'W. You are on course 270°T at 8.7 knots. At 1000 your position is LAT 37°00.5'N, LONG 75°37.0'W. What was the set and drift?
N a. 010° at 0.5 knot N b. 017° at 1.0 knot N c. 020° at 0.4 knot Y d. 032° at 0.9 knot 13809: Which chart, of the same scale, continues eastward from this chart?
Y a. 13205 N b. 13212 N c. 13214 N d. 13216 15019: At 2215, Cape Henry Light bears 242°pgc, Cape Charles Light bears 010.5°pgc, and Chesapeake Channel Tunnel North Light bears 319°pgc. You are heading 271°pgc. What is the relative bearing of Thimble Shoal Light?
N a. 280° N b. 332° Y c. 014° N d. 017° 15139: At what time would you expect to be abeam of Buoy "MP"?
N a. 2240 N b. 2244 Y c. 2248 N d. 2252 15141: At 2146 your position is 40°51.3'N, 71°59.2'W. If your engine speed has been 13 knots, what were the set and drift of the current you encountered since your 2100 position?
N a. 115°true at 1.1 knots N b. 115°true at 1.5 knots N c. 295° true at 1.1 knots Y d. 295°true at 1.5 knots 15509: At 1800, your position is LAT 41°06.5'N, LONG 71°43.5'W. How would the buoy which bears approximately 040°T from your position at a range of half a mile be painted?
Y a. Horizontally banded, green over red, with a green buoyancy chamber N b. Horizontally banded, red over green, with a red buoyancy chamber N c. Vertically striped, red and green N d. Solid green with red letters "BIS" 15718: Your vessel is entering New London Harbor Channel. If there is no current, what should you steer per gyro compass to stay on the range?
Y a. 351° N b. 354° N c. 357° N d. 006° 15765: The wind is northerly, and you estimate 3° leeway. Allowing for leeway what is the course to steer per gyro compass from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"?
Y a. 077°pgc N b. 082°pgc N c. 085°pgc N d. 087°pgc 15830: The black broken-line marking, across the river, that appears at mile 952.1 AHP represents a __________.
Y a. utility crossing N b. railroad N c. submarine crossing N d. revetment 15968: What was the speed made good from 1900 to 1925?
N a. 8.5 knots N b. 8.7 knots N c. 8.8 knots Y d. 9.1 knots 16040: At 0847 you take a round of bearings as follows:
Middle Ground Shoal Light - 237° pgc
Stratford Point Light - 289° pgc
New Haven Light - 019° pgc
What were the set and drift since your 0820 position?
N a. Set 180°T, drift 0.6 kt N b. Set 360°T, drift 0.3 kt N c. Set 180°T, drift 0.3 kt Y d. Set 360°T, drift 0.6 kt 16214: From your 0715 position, you set a course of 085°T. At 0745 you take the following bearings:
Race Rock Light 278°pgc
Watch Hill Light 049°pgc
Fisher's Island East Harbor Cupola 010°pgc
What was the current encountered between 0715 and 0745?
N a. Set 030°T, drift 0.4 knot N b. Set 216°T, drift 0.3 knot Y c. Set 070°T, drift 0.6 knot N d. Set 238°T, drift 1.0 knot 16419: You estimate the current to be 160°T at 1.2 knots. What should your course and speed be in order to make good 000°
T at 10 knots?
Y a. 358°T at 11.1 knots N b. 358°T at 09.8 knots N c. 002°T at 11.2 knots N d. 002°T at 09.9 knots 16470: The wind is easterly and will cause 2° of leeway. The current is 180° at 0.5 knot. If your engines are turning for 8.0 knots, what should you steer to remain in York River Entrance Channel?
N a. 304°T N b. 307°T N c. 310°T Y d. 315°T 16561: From your 1830 fix, you come left to a course of 290°T.
Which statement concerning Watch Hill Light is TRUE?
N a. The nominal range of its white light is 16 miles. Y b. It displays both red and white lights. N c. Its horn blasts every 15 seconds in fog. N d. Its geographic range is 18.5 miles at a 35-foot (10.7 meters) height of eye. 16569: The short-long dashed magenta line around Gardiners Island marks __________.
N a. a regulated anchorage Y b. fish trap areas N c. an area closed to the public N d. underwater cables 16707: Point Judith Harbor of Refuge __________.
N a. is used mostly by towing vessels N b. has a maximum depth of 14 feet at MHW N c. is easily accessible in heavy southerly seas Y d. is entered through the East Gap or the West Gap 16744: You continue to steer 285°pgc from your 0052 fix. Your speed is 9.2 knots. What is the course per standard magnetic compass?
N a. 273.5° N b. 276.0° N c. 298.0° Y d. 302.0° 16839: At 0800 you reduce speed from sea speed. Speed was reduced by the time you passed abeam of Cape Charles Lighted Bell Buoy "12" at 0814. At this time Buoy "12" was abeam on your starboard side at a distance of 0.65 mile. Assuming you continue to make good your course of 202°T, what is your new speed if you pass abeam of Cape Charles Lighted Bell Buoy "14" at a distance of 1.5 miles at 0907?
N a. 13.6 knots Y b. 12.9 knots N c. 12.3 knots N d. 12.0 knots