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.
44: The highest point on your towboat is 52 feet above the water, and the Helena Gage reads +9.6 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
N a. 73.1 feet Y b. 58.0 feet N c. 53.9 feet N d. 49.8 feet 61: What is the width of the navigable channel at Grand Gulf Island Light (mile 404.9 AHP) ?
Y a. 0.455 mile N b. 0.62 miles N c. 0.71 mile N d. 0.8 miles 68: The river will be temporarily closed to navigation at mile 531.3 AHP due to repairs to the bridge. This will occur at 1300, 5 January, and last for six hours. What minimum speed over the ground must you make from Red River Landing Gage in order not to be delayed?
N a. 7.3 mph N b. 6.8 mph Y c. 6.4 mph N d. 6.0 mph 223: At 1920, Cape Henry Light bears 225°pgc, and Chesapeake Channel Tunnel North Light bears 288°pgc. If your heading is 268°T, what is the relative bearing of Chesapeake Light?
N a. 206° Y b. 213° N c. 215° N d. 220° 240: At 1100, your position is LAT 41°11.3'N, LONG 72°28.0'W. You are steering a course of 069°T to leave Black Point one mile off your port beam. It has been reported that the Long Sand Shoal Buoys and Hatchett Reef Buoys are off station. Which of the following will serve as a line marking the hazards and keep your vessel in safe water?
N a. A bearing to Little Gull Island Light of not less than 090° N b. Maintaining a 7nm range off Orient point Y c. Danger bearing to Black Point of not more than 064°T N d. A distance to Saybrook Breakwater Light of not less than 1.3 miles 273: If you correct for the current in the previous question (215°T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy "W"?
N a. 1014 N b. 1018 N c. 1021 Y d. 1026 298: 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?
Y a. York Spit Light N b. New Point Comfort Shoal Light N c. Mobjack Bay Entrance Light N d. York River Entrance Channel Light "1" 308: A vessel at LAT 20°00'N, LONG 107°30'W is to proceed to LAT 24°40'N, LONG 112°30 W. What is the course and distance by mid-latitude sailing?
N a. 314.0°T, 389.0 miles Y b. 315.3°T, 394.0 miles N c. 317.2°T, 397.0 miles N d. 318.3°T, 399.0 miles 313: At 1400, your position is LAT 37°14.7'N, LONG 76°22.3'W. From this position, you head for the York River Entrance Channel Buoy "17". What should you steer per standard magnetic compass for this heading?
Y a. 125°psc N b. 122°psc N c. 119°psc N d. 108°psc 356: At 0410, you take the following bearings:
New Point Comfort Light "2" 242°T
Wolf Trap Light 313°T
Horn Harbor Entrance Light "HH" 262°T
What is your 0410 position?
N a. LAT 37°20.9'N, LONG 76°07.7'W Y b. LAT 37°21.0'N, LONG 76°08.1'W N c. LAT 37°21.1'N, LONG 76°07.9'W N d. LAT 37°21.2'N, LONG 76°08.2'W 440: By 1015, visibility has increased to 5.0 miles and you can see Fishers Island. Fishers Island has __________.
Y a. sparsely wooded hills and is fringed with shoals to the south N b. sheer cliffs rising from the sea to a high, flat plateau N c. barren, rocky hills with prominent sandy beaches N d. low and sandy beaches with salt ponds and marsh grass 441: 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?
Y a. 080°pgc N b. 078°pgc N c. 076°pgc N d. 074°pgc 444: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1220 Y b. 1215 N c. 1208 N d. 1157 484: You are on a great circle track departing from position LAT 25°50'N, LONG 77°00'W. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W. The distance along the great circle track from the vertex to a point (X) is 600 miles westward. Determine the position of point (X) on the great circle track.
N a. LAT 36°47.5'N, LONG 38°21.8'W N b. LAT 36°50.4'N, LONG 38°25.6'W Y c. LAT 36°55.6'N, LONG 38°30.0'W N d. LAT 37°02.3'N, LONG 38°34.4'W 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 575: What is the course per standard magnetic compass on the southern leg of York Spit Channel between buoys "15" and "23"?
N a. 341° Y b. 339° N c. 322° N d. 319° 1263: On 18 October , your 1330 ZT DR position is LAT 27°32.0'N, LONG 154°47.0'W. You are on course 115°T at a speed of 20 knots. What will be the zone time of sunset at your vessel?
N a. 1715 N b. 1729 Y c. 1742 N d. 1751 1275: At 1730 zone time, on 3 March , your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 knots. What is the zone time of sunset?
N a. 1829 N b. 1834 Y c. 1843 N d. 1852 1546: 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. 7.5 mph N b. 10.5 mph Y c. 13.5 mph N d. 16.5 mph 1777: At 2232 ZT, on 14 July , in DR position LAT 33°52'S, LONG 150°03'W you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 268.5°pgc. The variation is 15°E. What is the gyro error?
Y a. 1.0°E N b. 0.5°E N c. 0.0° N d. 0.5°W 2028: You are turning for 10 mph and passing Hog Point, LA. (mile 297.5 AHP). Angola reports that the current at Red River Landing is 4.5 mph. Which statement is TRUE?
N a. The main channel lies on the south side of the island you see ahead. N b. You are making 14.5 mph over the ground. Y c. An underwater stone dike has been constructed 0.5 miles upstream of Miles Bar Towhead. N d. You would expect to find the more favorable current near the broken red line in the river. 2176: On 9 November , at 0426 ZT, your position was LAT 25°17.0'S, LONG 154°16.0'E. Your vessel is steaming at 14.0 knots on course 066°T. A sextant observation of the Sun's lower limb is made at 0837 ZT. The chronometer reads 10h 35m 21s, and the sextant altitude (hs) is 50°26.9'. The index error is 1.5' on the arc, and the chronometer error is 01m 48s slow. Your height of eye on the bridge is 56.0 feet. What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?
N a. 50°18.1', 086.3°T N b. 50°18.1', 093.7°T Y c. 50°33.5', 085.9°T N d. 50°33.5', 093.7°T 2852: Your vessel is on a course of 129°T at 13 knots. At 1937 a light bears 151.5°T. At 2003 the light bears 174°T. At which time and distance off will your vessel be when abeam of this light?
N a. 2016, 2.8 miles N b. 2016, 3.9 miles Y c. 2021, 3.9 miles N d. 2021, 2.8 miles 3061: The propeller on a vessel has a diameter of 20.2 feet and a pitch of 19.0 feet. What would be the apparent slip if the vessel cruised 367 miles in a 24 hour day (observed distance) at an average RPM of 84?
Y a. +2.9% N b. -2.9% N c. +5.2% N d. -5.2% 3298: Your vessel consumes 216 barrels of fuel per day at a speed of 15.0 knots. What will be the fuel consumption of your vessel at 17.5 knots?
N a. 232 bbls N b. 252 bbls N c. 294 bbls Y d. 343 bbls 3472: You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 08h 00m 49s. When compared to the chronometer, the comparing watch reads 08h 01m 33s, and the chronometer reads 08h 00m 56s. What is the chronometer error?
Y a. 0m 12s fast N b. 0m 56s fast N c. 0m 44s slow N d. 1m 26s slow 4007: 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 gyro heading of 166°.
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°
Y a. 1.0°W N b. 1.0°E N c. 0.5°W N d. 0.5°E 10105: What is the course psc from Chesapeake Light to North Chesapeake Entrance Buoy NCA?
N a. 313°psc N b. 317°psc Y c. 321°psc N d. 325°psc 10302: Determine the course per standard magnetic compass from Cerberus Shoal Buoy 9 (LAT 41°10.4'N, LONG 71°57.1'W) to a position 0.2 mile south of Race Rock Light (LAT 41°14.6'N, LONG 72°02.8'W).
Y a. 326.5°psc N b. 324.0°psc N c. 298.5°psc N d. 296.0°psc 10305: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position one mile due south of Block Island Southeast Point Light?
N a. 070.0° N b. 076.5° Y c. 082.5° N d. 087.5° 10604: At 2245 your GPS position is LAT 41°01.75'N, LONG 72°48.40'W. You are steering course 086° per standard magnetic compass at a speed of 6.0 knots. At 2400 you fix your position by plotting several compass bearings on nearby known fixed objects. These result in a position of LAT 41°04.20'N, LONG 72°38.85'W. What were your set and drift?
N a. 162°T at .2 knot N b. 180°T at .4 knot N c. 339°T at .5 knot Y d. 007°T at .4 knot 11908: 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 330° at 1.2 knots, and a southerly wind causes 3° of leeway?
Y a. 117°T N b. 112°T N c. 104°T N d. 102°T 12106: While in the Back River, you sight the two tanks along the Northwest Branch (vicinity LAT 37°05.6'N, LONG 76°22.0'W) in line bearing 277° per standard magnetic compass. If your vessel is heading 243°psc, what is TRUE?
N a. There is no deviation. N b. The deviation table is incorrect. Y c. The compass error is 12°W. N d. The deviation is 3°E for bearings of 277°psc. 12612: You are on course 242° per standard magnetic compass (psc) when you take the following bearings: Stratford Point Light 325°psc Old Field Point Light 239°psc Middle Ground Light 270°psc What is your position?
N a. LAT 41°04.4'N, LONG 72°59.5'W Y b. LAT 41°05.1'N, LONG 72°59.3'W N c. LAT 41°05.4'N, LONG 73°00.1'W N d. LAT 41°04.8'N, LONG 73°59.3'W 15058: At 0740, you obtain the following radar data:
Branford Reef Light bears 248° true @ 3.0 nm
What is your position?
N a. LAT 41°12.0'N, LONG 72°51.3'W N b. LAT 41°12.0'N, LONG 72°51.8'W N c. LAT 41°12.1'N, LONG 72°51.5'W Y d. LAT 41°12.1'N, LONG 72°52.0'W 15161: From your 1815 position, you want to make good course 263°
T. Your engines are turning RPMs for 12 knots. The current is 050°T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light?
N a. 1851 N b. 1857 Y c. 1904 N d. 1911 15170: From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 11 knots, at what time should you arrive at Crisfield, MD?
N a. 2359 N b. 0037 Y c. 0112 N d. 0149 15220: If the Old Point Comfort main light was inoperative what emergency light would be shown?
N a. Flashing yellow N b. Alternating red and white Y c. Light of reduced intensity N d. Strobe light 15319: The coastline by Cape Henry is best described as __________.
N a. rocky with pine scrubs Y b. sandy hills about eighty feet high N c. low wetlands N d. low and thinly wooded with many beach houses 15439: What is your ETA off Chesapeake Bay Entrance Buoy "CB" at the entrance to the inbound lane of the traffic separation scheme?
Y a. 2058 N b. 2104 N c. 2109 N d. 2115 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° 15813: According to the DR track line from your 0100 position, how far off Roanoke Point Shoal Buoy "5" should you be when the buoy is abeam?
N a. 0.2 mile Y b. 0.6 mile N c. 1.3 mile N d. 1.8 miles 15818: At 0300, your position is LAT 41°01.7'N, LONG 72°55.1'W. From this position you steer a course of 289° per standard magnetic compass at an engine speed of 10.0 knots. At what time can you first expect to see Stratford Shoal Middle Ground Light if the luminous range is 8.0 miles?
Y a. 0303 N b. 0309 N c. 0312 N d. 0318 15966: The yellow buoys on either side of your vessel that lead to Mobjack Bay mark __________.
N a. the limits of the dredged channel Y b. fish trap areas N c. underwater cable areas N d. ferry routes 16146: From your 2054 position, you change course to 066°T. Maintaining course and speed of 18 knots, at what time can you expect to first cross the 90-foot curve if you experience no set and drift?
Y a. 2105 N b. 2111 N c. 2117 N d. 2125 16218: At 0830, Watch Hill Point bears 343°T at 3.5 miles by radar. What was the speed made good since 0745?
N a. 5.4 knots N b. 5.8 knots N c. 6.7 knots Y d. 7.1 knots 16240: The speed that you can expect to make good, while steering to make good your desired course, is __________.
N a. 13.5 knots Y b. 14.3 knots N c. 15.1 knots N d. 15.9 knots 16243: At 2207 Cape Charles Light bears 276°T, Chesapeake Light bears 194°T, and Cape Charles Lighted Bell Buoy "14" bears 312°T and is 2.0 miles off. What were the set and drift of the current acting on your vessel from 2129 to 2207?
N a. 258°T at 2.4 knots N b. 258°T at 1.5 knots N c. 078°T at 1.5 knots Y d. 078°T at 2.4 knots 16306: At 0345, you set a course to depart New London Harbor. Assuming no set and drift, which standard magnetic compass course must you steer to stay in the middle of the channel?
N a. 175°psc Y b. 187°psc N c. 190°psc N d. 192°psc 16642: Based on your 0500 fix, which statement is TRUE?
N a. You are seaward of the 120 fathom curve. N b. The course made good between 0445 and 0500 was 345°T. Y c. You should alter course to port to clear Southwest Ledge Shoal. N d. A radar contact bearing 020°T at 4.8 miles is buoy "2A".