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.

38: What are the color and shape of Anconia Pt. Light at mile 528.6 AHP?
82: If the Rosedale Gage reads -0.5 feet, what is the water level in relation to the low water reference plane? The low water reference plane (LWRP) for Rosedale, MS. is 3.0 feet.
120: You estimate the current as 2.5 mph. What is the speed over the ground?
192: At 2100, Cape Charles Light bears 321°pgc, and Cape Henry Light bears 247°pgc. Your latitude is __________. 

    N a. 37°00.6'N
    N b. 37°00.0'N
    N c. 36°59.7'N
    Y d. 36°59.4'N
221: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA" (LL#375)? 

    Y a. 257.0°
    N b. 255.5°
    N c. 251.0°
    N d. 249.0°
231: From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 13 knots, at what time should you arrive at Crisfield, MD? 

    N a. 0148
    N b. 0112
    Y c. 0037
    N d. 2359
261: You must arrive at your final destination by 0800. The distance from your 0300 position to the final destination is 40.5 miles. What minimum speed must be made good to arrive on time? 

    N a. 9.6 knots
    N b. 9.3 knots
    N c. 8.5 knots
    Y d. 8.1 knots
286: Your 1900 position is LAT 37°12.9'N, LONG 76°13.5'W. You change course to 317°pgc and slow to 8.0 knots. What is the course per standard magnetic compass? 

    Y a. 329°psc
    N b. 319°psc
    N c. 311°psc
    N d. 309°psc
408: You depart LAT 37°36'N, LONG 123°00'W, and steam 2022 miles on course 241°T. What is the longitude of your arrival by Mercator sailing? 

    N a. LONG 163°28.2'W
    N b. LONG 163°18.2'W
    Y c. LONG 156°51.7'W
    N d. LONG 154°18.3'W
442: Shortly after getting underway, you sight Stonington Outer Breakwater Light in line with Stonington Inner Breakwater Light bearing 000° per gyrocompass. Which statement is TRUE? 

    N a. The deviation is 2°W
    N b. The variation is 2°E.
    N c. The compass error is 16°W.
    Y d. The gyro error is 2.5°W
478: The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial course is 300.9°T. Determine the latitude of the vertex. 

    N a. 46°54.8'N
    N b. 47°24.7'N
    N c. 47°35.2'N
    Y d. 47°40.5'N
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
509: 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?` 

    N a. LAT 41°09.3'N, LONG 72°48.7'W
    Y b. LAT 41°09.7'N, LONG 72°48.1'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
516: You sight Bartlett Reef Light in line with New London Harbor Light bearing 043°pgc. You are heading 088°pgc and 098.5° per standard magnetic compass at the time of the observation. Which statement is TRUE? 

    N a. The true heading at the observation was 090°.
    N b. The gyro error is 2°E.
    N c. The magnetic compass error is 9.5°W.
    Y d. The deviation is 1.5°E by observation.
666: You are on a voyage via position LAT 44°00'N, LONG 150°00'E to LAT 46°15'N, LONG 124°00'W. Using gnomonic chart WOXZC 5270, determine which statement is TRUE? 

    Y a. A composite sailing with a limiting latitude of 51°N will  clear the Aleutian Islands.
    N b. The northern hemisphere vertex is east of the arrival position.
    N c. The Aleutian Islands are not a navigational hazard on the direct great circle track.
    N d. The final course angle lies in the northeast quadrant.
726: On 16 December , your 1810 zone time DR position is LONG 129°46.5'W. At that time you observe Polaris with a sextant altitude (hs) of 23°56.8'. The chronometer time of the sight is 03h 12m 31s, and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 52.6 feet. What is your latitude by Polaris? 

    Y a. 23°07.8'N
    N b. 23°12.3'N
    N c. 24°11.9'N
    N d. 24°18.6'N
1204: On 25 April , your 0930 zone time position is LAT 28°35'S, LONG 82°30'W. Your vessel is on course 300°T at a speed of 20.0 knots. Determine the time of LAN. 

    Y a. 1131
    N b. 1158
    N c. 1211
    N d. 1225
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
1308: At Filter Point Light (mile 475 AHP) there are 2 close straight dashed lines on the map passing through the black dots. What do these lines represent? 

    N a. Submerged oil pipelines
    N b. Submerged gas pipelines
    N c. Submerged telephone cables
    Y d. Aerial power cables
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
1684: You are passing Putney Lt. (mile 943.6 AHP). The gray shaded areas alongside the river represent __________. 

    N a. levees
    N b. weirs
    N c. dikes
    Y d. revetments
1743: 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.
    N b. You must report the allision to the nearest Corps.. of Engineers Office.
    Y c. You must report the accident to the nearest Officer in Charge, Marine Inspection.
    N d. You may wait until you reach your destination before reporting the allision to the U.S. Coast Guard.
1894: On 22 July , your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 149°T at an observed altitude (Ho) of 12°55.0'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe? 

    N a. Hamal
    N b. Rigel
    N c. Menkar
    Y d. Acamar
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
2244: At 1435 ZT, on 27 April , in DR position LAT 51° 56.8' N, LONG 150° 37.7' E, the Moon’s upper limb is observed on the visible horizon, bearing 242.2° psc. Variation is 2° W. What is the deviation? 

    Y a. 2.2°W
    N b. 2.2°E
    N c. 6.2°E
    N d. 6.2°W
2685: You are steering 031°T, and a light is picked up dead ahead at a distance of 12.7 miles at 0017. You change course to pass the light 3.5 miles off abeam to starboard. If you are making 11 knots, what is your ETA at the position 3.5 miles off the light? 

    N a. 0118
    N b. 0121
    Y c. 0124
    N d. 0127
2695: You are underway on course 017°T at a speed of 14.2 knots.
You sight a buoy bearing 025°T at a radar range of 3.7 miles at 1947. If you change course at 1953, what is the course to steer to leave the buoy abeam to starboard at 0.1 mile? 

    N a. 021°T
    N b. 024°T
    Y c. 027°T
    N d. 030°T
2867: Your vessel is on a course of 144°T at 20 knots. At 0022 a light bears 117.5°T, and at 0035 the light bears 099°T.
At what time and at what distance off will your vessel be when abeam of the light? 

    N a. 0044, 3.2 miles
    Y b. 0048, 4.3 miles
    N c. 0052, 5.1 miles
    N d. 0056, 6.0 miles
2882: Your vessel is steering 096°T at 17 knots. At 1847 a light bears 057°T, and at 1916 the same light bears 033°T. What will be your distance off abeam? 

    N a. 9.9 miles
    N b. 10.7 miles
    Y c. 11.4 miles
    N d. 11.9 miles
3071: If the speed necessary for reaching port at a designated time is 20.7 knots and the pitch of the propeller is 23.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 3% negative slip? 

    N a. 74
    N b. 79
    Y c. 86
    N d. 98
3072: If the speed necessary for reaching port at a designated time is 17.4 knots and the pitch of the propeller is 25.6 feet, how many revolutions per minute will the shaft have to turn, assuming a 3% positive slip? 

    N a. 63
    N b. 67
    Y c. 71
    N d. 75
3276: While steaming at 15 knots, your vessel burns 326 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 12.2 knots? 

    Y a. 175 bbls/day
    N b. 215 bbls/day
    N c. 277 bbls/day
    N d. 300 bbls/day
3751: While proceeding up a channel on course 010° per gyro compass, you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check of the chart shows the range to be 009°T and the variation to be 15°W. If the ship's course is 026°psc, what is the deviation for the present heading? 

    Y a. 2°W
    N b. 2°E
    N c. 1°W
    N d. 1°E
3772: Your ship is entering port from sea, and you sight a pair of range lights. When in line, they bear 315° per standard magnetic compass. The chart shows that the range bearing is 312°T, and that variation is 6°W. What is the deviation of your compass at the time of the sighting? 

    Y a. 3°E
    N b. 3°W
    N c. 9°E
    N d. 9°W
4002: 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 true heading of 258°.
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° 

    N a. 0.5°W
    N b. 0.0°
    N c. 0.5°E
    Y d. 1.0°E
10102: Your GPS position is LAT 37°07.5'N, LONG 75°39.1'W. What is the course per standard magnetic compass (psc) to a position 0.3 mile due north of North Chesapeake Entrance Buoy NCA (LL #375)? 

    N a. 222°psc
    N b. 228°psc
    N c. 231°psc
    Y d. 234°psc
10611: You are off the coast of Mexico and are taking a time tick for 1800. At approximately 1754, you hear the preparatory signal "VVVV de XDD" from the time signal station. Then you hear a series of 1 second dashes followed by a 9 second silent period and then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 06h 00m 07s. When compared to the chronometer, the comparing watch reads 06h 01m 24s, and the chronometer reads 05h 59m 23s. What is the chronometer error? 

    N a. 0m 07s fast
    N b. 1m 17s fast
    N c. 0m 37s slow
    Y d. 1m 54s slow
11102: What is the velocity of the first PM (Daylight Savings Time) maximum ebb current at Plum Gut on 10 August 1983? 

    N a. 3.3 knots
    N b. 4.0 knots
    N c. 4.5 knots
    Y d. 5.4 knots
11904: What is the true course to steer between the entrance to Winnapaug Pond (LAT 41°19.6'N, LONG 71°45.8'W) and the entrance to Lake Montauk (LAT 41°04.8'N, LONG 71°56.3'W), if you are turning for 6.5 knots, allow for a current of 295°T at 0.9 knot, and an easterly wind is causing 4° of leeway? 

    Y a. 196°T
    N b. 200°T
    N c. 213°T
    N d. 217°T
12708: You are on course 302° per standard magnetic compass when you take the following bearings: Little Gull Island Light 283°psc Race Rock Light 311°psc Latimer Reef Light 027°psc What is your position? 

    N a. LAT 41°12.2'N, LONG 71°57.6'W
    N b. LAT 41°12.4'N, LONG 71°57.4'W
    N c. LAT 41°12.4'N, LONG 71°57.9'W
    Y d. LAT 41°12.6'N, LONG 71°57.6'W
14517: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.) 

    N a. 2239
    N b. 2255
    N c. 2315
    Y d. 2344
15257: At 0725, Stratford Point Light bears 327°pgc at 3.1 miles.
At this time, you wish to change course to 048°T. The current is 135°T at 1.8 knots. Your engine speed is 8 knots. What course must you steer to make good 048°T? 

    Y a. 035°T
    N b. 038°T
    N c. 041°T
    N d. 044°T
15412: Determine your 1915 position using the following information obtained at 1915.

Visual bearings
Cape Charles Light 107°pgc
Cape Henry Light 172°pgc

Radar Bearing and Range
Chesapeake Channel Tunnel South Light 189°pgc at 7.2 miles 

    N a. LAT 37°03.5'N, LONG 76°05.9'W
    N b. LAT 37°03.5'N, LONG 76°09.3'W
    N c. LAT 37°05.9'N, LONG 76°03.5'W
    Y d. LAT 37°09.3'N, LONG 76°03.1'W
15416: At 2200, you are in position LAT 36°57.5'N, LONG 76°02.5'W. You intend to travel up the Thimble Shoals auxiliary Channel to Hampton Roads. According to the Coast Pilot,
what is the depth of the auxiliary channel on either side of the main channel? 

    N a. 28 feet (8.5 meters)
    Y b. 32 feet (9.8 meters)
    N c. 36 feet (11.0 meters)
    N d. 45 feet (13.7 meters)
15644: At 2045 You take the following set of bearings:

Watch Hill Point Light bears 005° true
Montauk Point Light bears 350° true

Determine your 2103 fix. 

    Y a. LAT 41°09.2'N, LONG 71°52.5'W
    N b. LAT 41°09.1'N, LONG 71°52.2'W
    N c. LAT 41°09.0'N, LONG 71°52.9'W
    N d. LAT 41°08.8'N, LONG 71°52.5'W
15663: At 0748, you change course to 160°T. Which loran reading will insure you clear Great Eastern Rock? 

    Y a. Nothing more than 9960-W-14645
    N b. Nothing more than 9960-X-25970
    N c. Nothing more than 9960-Y-43850
    N d. Nothing more than 9960-Y-43960
15799: At 0845, you are on a course of 097°T, and Townshend Ledge Buoy "10A" is close abeam to port. With a westerly current of 1.2 knots, what speed will you have to turn for from your 0845 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030? 

    N a. 8.5 knots
    N b. 9.7 knots
    Y c. 10.9 knots
    N d. 12.1 knots
15843: You continue to steer 195°T. You pass Cape Charles Lighted Bell Buoy "14", 0.9 miles abeam to starboard at 2111. Your speed made good from 2045 to 2111 is __________. 

    N a. 13.7 knots
    N b. 14.1 knots
    N c. 14.5 knots
    Y d. 14.8 knots
16041: From your 0847 fix, you change course to arrive at the rendezvous position and, correcting for current, you estimate your speed over the ground at 15 knots. What is your ETA at the rendezvous? 

    N a. 0902
    N b. 0905
    Y c. 0908
    N d. 0911
16506: At 0630, you pass Buoy "PI" 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 207°T and Race Rock Light is bearing 072°T. What is your 0654 position? 

    Y a. LAT 41°14.0'N, LONG 72°05.3'W
    N b. LAT 41°14.2'N, LONG 71°54.6'W
    N c. LAT 41°14.4'N, LONG 72°06.8'W
    N d. LAT 41°19.0'N, LONG 72°05.2'W
16618: What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard? 

    N a. 6.6 miles
    Y b. 6.9 miles
    N c. 7.1 miles
    N d. 7.3 miles
16646: The Tidal Current Tables indicate the following for the Race:
SLACK WATER MAXIMUM CURRENT
0328 0642 3.9 F
0947 1301 3.2 E

What current should you expect when transiting the Race? 

    N a. 3.9 knots, flooding
    Y b. 3.5 knots, flooding
    N c. 3.3 knots, flooding
    N d. 3.0 knots, flooding
16841: At 0907 you change course to 224°T, and your speed is now 13.0 knots. At 0939 Chesapeake Light is bearing 168°T at a distance of 7.1 miles, and Cape Henry Light is bearing 246°T. What were the set and drift since 0907? 

    N a. 326°T at 0.7 knot
    N b. 326°T at 1.4 knots
    Y c. 146°T at 1.4 knots
    N d. 146°T at 0.7 knots
16845: After the pilot boards, he tells you the gyro has a 2°E error. If this is true, what should the bearing be along Trestle C of the Chesapeake Bay Bridge-Tunnel as your vessel passes abeam of it? 

    N a. 052°pgc
    N b. 049°pgc
    Y c. 047°pgc
    N d. 045°pgc