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.
45: You are in charge of a vessel that damages an aid to navigation established and maintained by the United States. Which statement is TRUE?
N a. You must take the aid in tow and deliver it to the nearest Coast Guard, Marine Safety Office. Y b. You must report the accident to the nearest Officer in Charge, Marine Inspection. N c. You may wait until you reach your destination before reporting the allision to the U.S. Coast Guard. N d. You must report the allision to the nearest Corps. of Engineers office. 70: What is the vertical clearance of the Natchez-Vidalia Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.5 feet)?
N a. 125.6 ft Y b. 119.5 ft N c. 108.3 ft N d. 102.2 ft 267: At 0802, Branford Reef Light bears 348°T at 0.75 mile, and the north point of Falkner Island bears 088°T at 6.7 miles. What were the set and drift since 0740?
N a. Set 040°T, drift .2 knot N b. Set 220°T, drift .2 knot Y c. Set 220°T, drift .6 knot N d. You are making good your intended course and speed. 327: At 0315, you obtain the following bearings:
Wolf Trap Light bearing 091° true
Old Plantation Flats Light bearing 179° true
What is the true course from this position to the entrance of York Spit Channel?
N a. 217° N b. 211° Y c. 208° N d. 203° 383: From point "A", you lay out an intended track line to a point where Block Island North Light bears 180°T at 2.9 miles (Point "B"). What is the length of this leg of the voyage?
Y a. 24.4 miles N b. 23.9 miles N c. 23.7 miles N d. 20.4 miles 434: As you enter the New Haven Outer Channel, you sight the outer range markers in line directly ahead. Your heading at this time is 347°psc. What is your compass deviation by observation?
N a. 4.5°West N b. 3.5°West N c. 3.0°East Y d. 0.5°East 474: You are on a great circle track departing from LAT 25°50.0'N, LONG 77°00.0'W and your initial course is 061.7°T. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W.
What is the distance along the great circle track between the point of departure and the vertex?
N a. 2735.1 miles Y b. 2664.9 miles N c. 2583.2 miles N d. 2420.0 miles 531: You depart LAT 15°48'N, LONG 174°06'E and steam 905 miles on course 090°. What is the LONG of arrival?
N a. 165°41'W Y b. 170°13'W N c. 172°47'W N d. 179°06'E 561: At 0615 you change course to 078°T. If there is no current, when will Falkner Island Light be abeam?
Y a. 0730 N b. 0735 N c. 0743 N d. 0750 622: You are on a voyage from Limoy, Costa Rica, to Los Angeles, CA. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate 24.0 hours for bunkering at Colon, and 12.0 hours for the Panama Canal transit. If you take departure at 1836 hours (ZD +6), 28 January, what is your ETA (ZD +8) at Los Angeles?
N a. 1736, 9 February N b. 1736, 8 February Y c. 1336, 8 February N d. 0536, 8 February 816: On 15 November , your 0813 zone time (ZT) fix gives you a position of LAT 22°30.0'N, LONG 67°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1215 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the latitude at 1200 ZT?
Y a. 21°42.5'N N b. 21°39.3'N N c. 21°36.0'N N d. 21°32.8'N 977: On 8 February , your 0800 zone time (ZT) position was LAT 28°55.0'S, LONG 52°27.0'W. Your vessel was steaming on course 036°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0938 ZT. The chronometer read 12h 37m 23s and was slow 01m 24s. The observed altitude (Ho) was 45°29.2'. Local Apparent Noon (LAN) occurred at 1240 ZT. The observed altitude (Ho) was 77°10.5'. What was the longitude of your 1200 ZT running fix?
N a. 51°29.6'W N b. 51°31.4'W N c. 51°33.1'W Y d. 51°35.4'W 981: On 20 September , your 0730 zone time position was LAT 28°58.0'N, LONG 152°26.0'W. Your vessel was steaming on course 225°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0931 ZT. The chronometer read 07h 29m 20s and was slow 02m 22s. The observed altitude (Ho) was 44°14.4'. LAN occurred at 1206 zone time. The observed altitude (Ho) was 62°49.5'. What was the longitude of your 1200 zone time running fix?
N a. LONG 153°32.5'W N b. LONG 153°27.2'W Y c. LONG 153°23.5'W N d. LONG 153°20.0'W 1078: On 6 April , your 1830 ZT DR position is LAT 26°33.0'N, LONG 64°31.0'W. You are on course 082°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. NP-0008
N a. LAT 26°49.5'N, LONG 64°06.5'W Y b. LAT 26°32.5'N, LONG 64°27.1'W N c. LAT 26°31.2'N, LONG 64°32.1'W N d. LAT 26°28.7'N, LONG 64°32.1'W 1208: On 12 July , your 0800 ZT DR position is LAT 24°15.0'N, LONG 132°30.0'W. Your vessel is on course 045°T at a speed of 15.0 knots. What is the ZT of local apparent noon (LAN)?
N a. 1146 N b. 1148 Y c. 1152 N d. 1159 1301: As you approach Casting Yard Dock Lt. (mile 265.4 AHP) you notice on the map a circle with 2 black sectors. This symbol indicates a __________.
N a. lock N b. warning sign Y c. river gage N d. mooring buoy 1365: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 11.0 mph N b. 8.0 mph Y c. 6.0 mph N d. 5.5 mph 1423: You pass Ratcliff Light (mile 289.8) at 1650. What was your average speed since leaving Baton Rouge?
N a. 7.3 mph Y b. 7.6 mph N c. 8.0 mph N d. 8.3 mph 1650: On 22 October , in DR position LAT 21°51.0'S, LONG 76°24.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256°psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2°E. What is the deviation of the standard magnetic compass?
N a. 0.3°E Y b. 0.3°W N c. 2.0°E N d. 2.0°W 1742: The highest point on your towboat is 32 feet above the
water, and the Helena Gage reads +6.6 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
Y a. 80.8 feet N b. 73.1 feet N c. 68.0 feet N d. 56.1 feet 1755: The U. S. Coast Guard facility at mile 361 AHP is represented by which numbered white square on your map?
Y a. 8 N b. 11 N c. 12 N d. 13 1765: The river will be temporarily closed to navigation at mile 531.3 AHP due to repairs to the bridge. This will occur at 1530, 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?
Y a. 6.2 mph N b. 6.4 mph N c. 6.8 mph N d. 7.3 mph 1893: On 22 July , your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 104°T at an observed altitude (Ho) of 9°55.7'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?
N a. Hamal Y b. Rigel N c. Menkar N d. Acamar 1957: At 1923, on September 21, you pass Bixby Towhead Light (mile 873.7 AHP). What was your average speed since leaving Cairo?
N a. 9.2 mph N b. 8.8 mph Y c. 8.5 mph N d. 7.2 mph 2213: Controlling depth of a channel __________.
Y a. is the least depth within the limits of the channel N b. is the greatest depth within the limits of the channel N c. permits the safe use of the channel to drafts of more than that depth N d. is the designed dredging depth of a channel constructed by the U.S. Army Corps. of Engineers 2279: You observe the lower limb of the Sun at a sextant altitude (hs) of 58°06.6' on 5 April . The index error is 1.0' off the arc. The height of eye is 55 feet (16.8 meters). What is the observed altitude (Ho)?
N a. 58°14.2' Y b. 58°15.8' N c. 58°16.9' N d. 58°18.1' 2290: You observe the lower limb of the Sun at a sextant altitude (hs) of 75°12.3' on 6 August . The index error is 1.5' off the arc. The height of eye is 32 feet (9.8 meters). What is the observed altitude (Ho)?
N a. 75°18.6' Y b. 75°24.0' N c. 75°30.7' N d. 75°34.6' 2700: You are underway on course 163°T at a speed of 15.8 knots.
You sight a buoy bearing 161°T at a radar range of 5.5 miles at 1319. If you change course at 1325, what is the course to steer to leave the buoy abeam to starboard at 1.0 mile?
Y a. 145°T N b. 148°T N c. 151°T N d. 175°T 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 2871: Your vessel is on a course of 052°T at 16 knots. At 0916 a light bears 078.5°T, and at 0927 the light bears 097°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0929, 2.0 miles N b. 0932, 2.3 miles N c. 0935, 2.6 miles Y d. 0938, 2.9 miles 2891: You are steaming on course 168°T at a speed of 18 knots. At 1426 you sight a buoy bearing 144°T. At 1435 you sight the same buoy bearing 116°T. What is your distance off at the second bearing and predicted distance when abeam?
Y a. 2.3 miles 2nd bearing, 1.8 miles abeam N b. 2.5 miles 2nd bearing, 2.8 miles abeam N c. 2.8 miles 2nd bearing, 1.8 miles abeam N d. 3.3 miles 2nd bearing, 2.8 miles abeam 3079: If the speed necessary for reaching port at a designated time is 18.2 knots and the pitch of the propeller is 23.9 feet, how many revolutions per minute will the shaft have to turn, assuming a 2% negative slip?
N a. 70 N b. 73 Y c. 76 N d. 79 3104: You are turning 84 RPM, with a propeller pitch of 22 feet, and an estimated slip of 0%. What is the speed of advance?
N a. 16.8 knots N b. 17.7 knots N c. 18.0 knots Y d. 18.2 knots 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 3471: You are underway on course 172°T at 18.5 knots. The current is 078°T at 2.8 knots. What is the speed being made good?
Y a. 18.5 knots N b. 19.0 knots N c. 19.5 knots N d. 20.0 knots 10700: At 1020 your position is LAT 41°11.0'N, LONG 71°50.0'W. You are on course 056° per standard magnetic compass at 9.2 knots. At 1112 your position is LAT 41°15.9'N, LONG 71°41.7'W. What were the set and drift?
N a. 130°T at 0.9 knot Y b. 141°T at 1.2 knots N c. 331°T at 0.8 knot N d. 346°T at 1.1 knots 11707: Your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course to steer per standard magnetic compass to arrive at LAT 36°59.0'N, LONG 75°48.5'W, if you are turning for 7.8 knots, the current is 139°T at 1.3 knots, and a northwesterly wind is causing 3° of leeway?
N a. 290.0°psc Y b. 286.0°psc N c. 283.5°psc N d. 280.5°psc 13001: At 1222 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 14.5 knots. What is your ETA at Twenty-Eight Foot Shoal Lighted Buoy (LAT 41°09.3'N, LONG 72°30.5'W)?
N a. 1309 Y b. 1317 N c. 1321 N d. 1328 13410: You plan to anchor your vessel at LAT 41°05.1'N, LONG 72°59.3'W. Assuming that normal conditions exist, how much anchor cable should you put out?
N a. 150 to 300 feet N b. 300 to 440 feet Y c. 440 to 600 feet N d. 640 to 750 feet 15022: You are upbound approaching Springfield Bend Lt. (mile 244.8 AHP) downriver from Profit Island. Which of the following statements is TRUE?
N a. Profit Island Chute is open to navigation and is a shortcut for single-barge tows. N b. Tow length must not exceed 600 feet to use Profit Island Chute. Y c. Profit Island Chute is closed to navigation. N d. Tows must navigate towards right descending bank when passing Profit Island Chute. 15117: At 1930, you take a fix using the following radar ranges:
York Spit Light - 3.6 miles
New Point Comfort Spit Light "2" - 2.0 miles
York Spit Swash Channel Light "3" - 2.5 miles
Your longitude is __________.
N a. 76°16.5'W Y b. 76°16.8'W N c. 76°17.0'W N d. 76°17.2'W 15142: At 2146 if your fathometer is set on feet, what should be the approximate reading on your fathometer?
Y a. 88 feet N b. 105 feet N c. 121 feet N d. 166 feet 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" 15739: Your 1900 position is LAT 40°45.5'N, LONG 72°03.0'W. Your course is 046°T, and your engines are turning RPM's for 9 knots. At your 1939 DR position, what is the expected relative bearing of Montauk Point Light on the port bow?
N a. 024° relative Y b. 028° relative N c. 032° relative N d. 036° relative 15810: You alter course from your 0045 position to head for a point 0.5 mile north of Mattituck Breakwater Light "MI". If the visibility is 10 miles and you make good 9 knots, at approximately what time will you lose sight of Saybrook Breakwater Light?
N a. You have already lost sight at 0045 Y b. 0055 N c. 0120 N d. The light is visible all the way to Mattituck Inlet 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 15962: Based on dead reckoning, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone N b. depart a restricted area N c. cross a submerged pipeline Y d. depart a regulated area 16312: Assuming no current, at what time can you expect to be abeam of Townshend Ledge Lighted Buoy?
N a. 0859 N b. 0902 N c. 0905 Y d. 0910 16343: At 2302 you change course to compensate for an estimated current of 090°T, at 1.0 knot. What course per gyrocompass will you steer to leave Endeavor Shoals Lighted Gong Buoy "3" abeam to port at 1 mile?
N a. 324°pgc Y b. 327°pgc N c. 330°pgc N d. 333°pgc 16544: At 2347 you are advised that your assistance is no longer needed. At 2350 you change course to make good 268°T. At 0015 you take the following round of bearings:
Kelsey Point Breakwater light 024°pgc
Horton Point Light 100°pgc
Falkner Island Light 333°pgc
At 0030 Falkner Island Lt. bears 000°T at 5.9 miles.
What is the course and speed made good between 0015 and 0030?
N a. CMG 262°T, SMG 10.4 knots N b. CMG 268°T, SMG 10.8 knots N c. CMG 268°T, SMG 10.4 knots Y d. CMG 272°T, SMG 10.8 knots 16568: From your 1930 position, you plot a course to pass 0.5 mile due south of Race Rock Light. If your vessel's speed is 8.0 knots, the current's set and drift are 040°T at 1.4 knots,
and a south wind produces a 3° leeway, what true course should you steer to make good your desired course?
Y a. 275°T N b. 280°T N c. 290°T N d. 294°T 16615: At 0112, the radar range to Branford Reef Light is 2.9 miles. At 0125, the range is 3.6 miles. What is the position of your 0125 running fix if you are steering 124°T at 12 knots?
Y a. LAT 41°09.7'N, LONG 72°48.1'W N b. LAT 41°09.7'N, LONG 72°48.7'W N c. LAT 41°09.8'N, LONG 72°47.2'W N d. LAT 41°10.2'N, LONG 72°47.7'W