USCG Navigation Problems: Master's License

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.


123: On which map would you find Redman Point, Arkansas?


145: As you approach Joseph Henry Light (mile 445.2 AHP) which daymark would you see?


218: If there is no current, what is the course per gyro compass from your 1600 position to point A located 0.5 mile due east of Hog Island Lighted Bell Buoy "12"?


250: At 0045, you obtain the following information:

Radar range to Inlet Point is 1.4 miles;
Radar range to Rocky Point is 2.8 miles.
Radar range to Horton Point is 2.8 miles.

What were the set and drift between 0005 and 0045?

    N a. 275°true, 0.9 knot
    N b. 275°true, 1.4 knots
    Y c. 095°true, 1.4 knot
    N d. 095°True, 0.9 knots

320: At 2150, your position is LAT 36°57.2'N, LONG 76°01.3'W. In this position on the chart, you note a light magenta line running in a direction of 030°T. This line indicates the limits of __________.

    Y a. a pilotage area
    N b. a precautionary area
    N c. the Cape Henry Light red sector
    N d. chart 12222

382: You arrive at Cape Charles City at 1700 and depart at 1800. You are underway in Chesapeake Bay and encounter heavy fog. At 1830, you obtain the following radar information:

Old Plantation Flats Light bearing 041.5° true @ 1.9 nm

What is your 1830 position?

    N a. LAT 37°10.3'N, LONG 76°04.5'W
    N b. LAT 37°10.3'N, LONG 76°06.5'W
    N c. LAT 37°12.3'N, LONG 76°06.5'W
    Y d. LAT 37°12.3'N, LONG 76°04.4'W

390: A vessel at LAT 29°38.0'N, LONG 93°49.0'W, heads for a destination at LAT 24°38.0'N, LONG 82°55.2'W. Determine the true course and distance by Mercator sailing.

    N a. 115°T, 637 miles
    Y b. 117°T, 658 miles
    N c. 122°T, 648 miles
    N d. 126°T, 665 miles

398: You depart LAT 32°16.6'N, LONG 68°28.0'W. What is the course and distance as calculated by Mercator sailing to a position at LAT 43°12.2'N, LONG 55°39.0'W?

    Y a. 042.8°T, 896.2 miles
    N b. 049.1°T, 955.1 miles
    N c. 132.8°T, 896.2 miles
    N d. 136.6°T, 955.1 miles

467: Determine the great circle initial course from LAT 29°46.0'S, LONG 30°26.0'E to LAT 31°52.0'S, LONG 115°22.0'E.

    N a. 074°T
    N b. 113°T
    Y c. 117°T
    N d. 121°T

534: You depart LAT 52°01'N, LONG 176°09'E, for LAT 52°01'N, LONG 178°46'W. What are the course and distance by parallel sailing?

    N a. 090°T, 95 miles
    Y b. 090°T, 188 miles
    N c. 270°T, 95 miles
    N d. 270°T, 188 miles

558: At 0530, you change course to 090°T and increase speed to 8.5 knots. What is the course to steer per gyro compass if northerly winds are causing 2° of leeway?

    N a. 094°pgc
    N b. 092°pgc
    Y c. 090°pgc
    N d. 088°pgc

559: At 0615, Stratford Point Light bears 292°pgc, Falkner Island Light bears 052°pgc, and Branford Reef Light bears 018°pgc. What was the current since 0530?

    N a. 083° at 0.9 knots
    Y b. 083° at 1.2 knots
    N c. 263° at 1.2 knots
    N d. 263° at 0.9 knots

618: Your vessel departs Seattle at 1010 zone time (ZD +8), on 28 May, bound for Apra, Guam (ZD -10). The distance by great circle is 4,948 miles, and you estimate that you will average 18.5 knots. What is your estimated zone time of arrival?

    Y a. 0737, 9 June
    N b. 1737, 9 June
    N c. 1937, 9 June
    N d. 0737, 10 June

625: You are on a voyage from Boston, MA, to the South Pass, LA. The distance is 1870 miles, and the speed of advance is 13.6 knots. You estimate 16.5 hours for bunkering enroute at Port Everglades, FL. If you sailed at 0836 hours (ZD +5), 26 February , what was your ETA (ZD +6) at the South Pass?

    N a. 2336, 3 March
    N b. 1136, 4 March
    N c. 1236, 4 March
    Y d. 1736, 4 March

627: You are on a voyage from Halifax, Nova Scotia, to Galveston, TX. The distance is 2138 miles, and the speed of advance is 12.5 knots. You estimate 18.0 hours for bunkering enroute at Port Everglades, FL. If you sail at 0648 hours (ZD +4), 12 June, what is your ETA (ZD +5) at Galveston?

    Y a. 0250, 20 June
    N b. 0350, 20 June
    N c. 0550, 20 June
    N d. 1350, 20 June

638: What is the mile point of the Fulton Gage?

    Y a. 778 AHP
    N b. 687 AHP
    N c. 632 AHP
    N d. 598 AHP

752: On 5 May , at 1953 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 29°30.0'N, LONG 66°25.7'W, and your sextant reads 29°07.2'. Your chronometer reads 11h 51m 45s, and your chronometer error is 01m 36s slow. Your height of eye is 56 feet, and the index error for your sextant is 1.5' on the arc. What is the latitude of your vessel from your observation of Polaris?

    N a. 29°14.3'N
    Y b. 29°23.6'N
    N c. 29°32.3'N
    N d. 29°38.8'N

1421: What is your ETA at the Helena Highway Bridge?

    Y a. 1335, 24 Sept
    N b. 1109, 24 Sept
    N c. 0926, 24 Sept
    N d. 0458, 24 Sept

1490: On 11 January , your 0450 ZT position is LAT 38°42'N, LONG 14°16'W. You observe Polaris bearing 358.5°pgc. At the time of the observation the helmsman noted that he was heading 160°pgc and 173°psc. The variation is 9°W. What is the deviation for that heading?

    N a. 1°E
    N b. 1°W
    Y c. 3°W
    N d. 13°W

2187: At which of the following times would you be able to listen to lower Mississippi River conditions on VHF Channel 22?

    N a. 0900 hours
    N b. 1100 hours
    Y c. 1300 hours
    N d. 1600 hours

2456: You have steamed 520 miles at 22 knots and burning 319 barrels of fuel per day. You must decrease your consumption to 137 barrels per day with 410 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?

    N a. 12.8
    N b. 14.8
    Y c. 16.2
    N d. 18.2

2676: While on a course of 019°pgc, a light bears 14° on the port bow at a distance of 15.3 miles. What course should you steer to pass 1.5 miles abeam of the light, leaving it to port?

    N a. 006°pgc
    Y b. 011°pgc
    N c. 013°pgc
    N d. 015°pgc

2693: While on a course of 279°T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

    N a. 253°T
    Y b. 265°T
    N c. 291°T
    N d. 305°T

2858: Your vessel is on a course of 082°T at 19 knots. At 0255 a light bears 059.5°T, and at 0312 the light bears 037°T.
At what time and at what distance off will your vessel be when abeam of the light?

    N a. 0333, 5.1 miles
    N b. 0321, 4.7 miles
    N c. 0327, 4.3 miles
    Y d. 0324, 3.8 miles

2880: Your vessel is steering 218°T at 19 knots. At 2223 a light bears 261°T, and at 2234 the same light bears 289°T. What will be your distance off abeam?

    N a. 4.5 miles
    Y b. 4.9 miles
    N c. 5.3 miles
    N d. 5.7 miles

2887: Your vessel is steering 283°T at 10 knots. At 0538 a light bears 350°T, and at 0552 the same light bears 002°T. What will be your distance off abeam?

    N a. 9.6 miles
    Y b. 10.3 miles
    N c. 10.7 miles
    N d. 11.3 miles

2892: You are steaming on a course of 114°T at 17 knots. At 1122 you observe a lighthouse bearing 077°T. At 1133 the lighthouse bears 051°T. What is your distance off at the second bearing?

    N a. 3.3 miles
    N b. 3.9 miles
    Y c. 4.3 miles
    N d. 4.9 miles

2893: You are steaming on a course of 253°T at 14 knots. At 2329 you observe a lighthouse bearing 282°T. At 2345 the lighthouse bears 300°T. What is your distance off at the second bearing?

    N a. 3.7 miles
    N b. 4.3 miles
    N c. 5.2 miles
    Y d. 5.9 miles

3067: From 1020, 3 March, to 1845, 5 March, your vessel steamed an observed distance of 845.6 miles. The average RPM was 78, and the pitch of the propeller was 20'03". What was the slip?

    N a. -4%
    Y b. +4%
    N c. -8%
    N d. +8%

3075: If the speed necessary for reaching port at a designated time is 15.7 knots and the pitch of the propeller is 23.4 feet, how many revolutions per minute will the shaft have to turn, assuming a 6% negative slip?

    Y a. 64
    N b. 68
    N c. 72
    N d. 76

3264: You have steamed 1134 miles at 10 knots, and consumed 121 tons of fuel. If you have to steam 1522 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 12 knots?

    N a. 146 tons
    N b. 189 tons
    N c. 200 tons
    Y d. 234 tons

3462: You are underway on course 160°T at 10 knots. The current is 210°T at 0.9 knots. What is the course made good?

    N a. 156°T
    N b. 160°T
    Y c. 164°T
    N d. 169°T

3615: You want to make good a true course of 137°. A north-northeast wind produces a 3° leeway. The variation is 11° west, deviation is 5° east, and gyrocompass error is 2° east. What course must you steer per gyrocompass to make the true course good?

    Y a. 132°pgc
    N b. 134°pgc
    N c. 136°pgc
    N d. 138°pgc

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

11401: At 1520 your GPS position is LAT 41°13.1'N, LONG 72°16.1'W. At 1630 your position is LAT 41°17.5'N, LONG 72°04.7'W. What were your true course and speed made good?

    N a. 344° at 8.2 knots
    N b. 077° at 9.5 knots
    Y c. 063° at 8.3 knots
    N d. 059° at 8.1 knots

12105: 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 274°psc. If your vessel is heading 300°psc, what is TRUE?

    Y a. There is no deviation.
    N b. The deviation is equal to the variation.
    N c. The deviation is 9°E.
    N d. The deviation is 0° only for a bearing of 274°psc.

12305: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 095° per standard magnetic compass. If your vessel was heading 056° per standard magnetic compass at the time, which of the following is TRUE?

    N a. You should subtract 15°Compass error for bearings of 095°.
    N b. The deviation table is correct for all bearings of 095°.
    Y c. The vessel should be swung, and the deviation table checked.
    N d. The compass error is 19°W for all headings.

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

13903: Your position is LAT 41°12.4'N, LONG 71°53.2'W. You are on course 163°T enroute to sea. You can ensure that you will clear Montauk Point if your loran reading is always __________.

    N a. more than 9960-X-25990
    Y b. less than 9960-W-14665
    N c. more than 9960-Y-43870
    N d. All of the above

14100: Your vessel is awaiting lockage at Bonneville Lock. The staff gauge on the guide wall reads 18'-06". What is the maximum vessel draft allowed to enter the lock?

    N a. 17'-00"
    Y b. 17'-06"
    N c. 18'-00"
    N d. 18'-06"

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

15506: You are underway in the vicinity of Block Island and obtain the following lines of position:

Montauk Point Light 263°pgc
Block Island Southeast Light 026°pgc
Radar Bearing to Block Island Southwest Point 348°pgc

What is your position at the time of these sightings?

    N a. LAT 41°05.0'N, LONG 71°36.2'W
    N b. LAT 41°05.1'N, LONG 71°36.0'W
    Y c. LAT 41°05.3'N, LONG 71°35.8'W
    N d. LAT 41°05.4'N, LONG 71°35.5'W

15611: From your 1815 position, you want to make good a course of 263°T. Your engines are turning RPM's 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. 1849
    N b. 1854
    N c. 1859
    Y d. 1904

15662: At 0748, you take the following bearings:

Watch Hill Point Light bearing 026.5°pgc
Race Point Light bearing 275.5°pgc


What is the approximate depth of water under the keel at this position?

    N a. 325 feet (98.5 meters)
    N b. 175 feet (53.0 meters)
    N c. 130 feet (39.4 meters)
    Y d. 112 feet (33.9 meters)

15710: From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 3°
leeway. What course should you steer per standard magnetic compass in order to make good your true course?

    N a. 118°psc
    Y b. 115°psc
    N c. 112°psc
    N d. 109°psc

15824: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?

    N a. 1445, 20 April
    N b. 1830, 20 April
    Y c. 0028, 21 April
    N d. 0821, 21 April

15912: If there is no current, what is the course per standard magnetic compass from your 0802 fix to the position 1.1 miles north of Falkner Island Light?

    N a. 064°
    N b. 068°
    Y c. 095°
    N d. 099°

16069: From your 2118 position, you steer a course of 288°T at an engine speed of 7.0 knots. Visibility is 2 miles. Height of eye is 12 feet (3.7 meters). At what time can you expect to see Old Point Comfort Light?

    N a. The light is visible at 2118
    N b. 2139
    N c. 2201
    Y d. 2232

16108: From your 0410 fix, what is the course per standard magnetic compass to the entrance to York Spit Channel between buoys "37" and "38"?

    N a. 178°
    Y b. 176°
    N c. 156°
    N d. 152°

16208: What is your ETA at point "A"?

    N a. 0640
    Y b. 0651
    N c. 0655
    N d. 0702

16711: At what time will you cross the 60 foot curve if you make good 12 knots?

    Y a. 0528
    N b. 0534
    N c. 0541
    N d. 0544

16738: At 2212 your position is LAT 40° 51'N, LONG 71° 53.5'W.

What is the course to steer, per gyrocompass from your 2212 position, to leave Montauk Point Buoy "MP" abeam to port at 1 mile if easterly winds are causing 3° of leeway?

    N a. 027° pgc
    N b. 030° pgc
    N c. 032° pgc
    Y d. 035° pgc