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.


197: At 2215, Cape Henry Light bears 242pgc, Cape Charles Light bears 010.5pgc, and Chesapeake Channel Tunnel North Light bears 319pgc. You are heading 271pgc. What is the relative bearing of Thimble Shoal Light?


220: From your 1715 fix, you steer 214T at 12 knots. At 1800,
you take the following bearings:

Chesapeake Light bearing 175pgc
Cape Henry Light bearing 239pgc
Cape Charles Light bearing 293pgc

Your 1800 position is __________.


246: The red sector of New London Harbor Light covers from __________.


330: Which chart could you use for greater detail of the area at the south end of York Spit Channel?

    N a. 12254
    N b. 12226
    N c. 12224
    Y d. 12222

335: At 1810, you obtain the following bearings:

Cape Charles Light bearing 005 pgc
Cape Henry Light bearing 251.5 pgc

What is your position?

    N a. LAT 3656.0'N, LONG 7558.5'W
    N b. LAT 3655.4'N, LONG 7556.0'W
    Y c. LAT 3656.8'N, LONG 7555.6'W
    N d. LAT 3657.4'N, LONG 7554.6'W

396: A vessel at LAT 1022.0'S, LONG 718.0'E, heads for a destination at LAT 652.0'N, LONG 5723.0'W. Determine the true course and distance by Mercator sailing.

    N a. 285T, 3825.3 miles
    Y b. 285T, 4025.7 miles
    N c. 296T, 3825.3 miles
    N d. 296T, 4025.7 miles

435: Which course should you change to per standard magnetic compass as you pass SW Ledge Light to remain in the channel?

    N a. 026psc
    Y b. 022psc
    N c. 014psc
    N d. 007psc

439: At 0337, fog closes in and you anchor under the following radar ranges and bearing:

South tip of Watch Hill Point 3.0 miles
East point of Fishers Island 1.4 miles
Latimer Reef Light 331T

What is the approximate depth of water at your anchorage?

    N a. 135 feet (40.9 meters)
    N b. 120 feet (36.4 meters)
    Y c. 100 feet (30.3 meters)
    N d. 83 feet (25.2 meters)

454: Determine the great circle distance and initial course from LAT 2600.0'S, LONG 5600.0'W to LAT 3400.0'S, LONG 1815.0'E.

    N a. 3705 miles, 153T
    N b. 3841 miles, 068T
    N c. 3849 miles, 248T
    Y d. 3805 miles, 117T

512: At 0200, you take the following bearings:

Falkner Island Light 004.5T
Kelsey Pt. Breakwater Lt. 054.0T
Horton Point Light 115.0T

What were the set and drift from 0130?

    Y a. 260 at 1.0 knot
    N b. 080 at 0.5 knot
    N c. 260 at 0.5 knot
    N d. There is no current.

519: At 0520 you are on course 243pgc at 12 knots. What is the course per standard magnetic compass?

    N a. 227psc
    N b. 233psc
    N c. 258psc
    Y d. 262psc

610: At 0820 zone time, on 10 April , you depart Yokohoma, LAT 3527.0'N, LONG 13939.0'E (ZD -9). You are bound for Honolulu, LAT 2118.5'N, LONG 15752.2'W (ZD +10) and you estimate your speed of advance at 17.5 knots. The distance is 3,397 miles. What is your estimated zone time of arrival at Honolulu?

    N a. 0127, 17 April
    Y b. 1527, 17 April
    N c. 0127, 18 April
    N d. 0927, 18 April

612: At 0530 zone time, on 20 December , you depart Cape Town (ZD -1). You are bound for New York (ZD +5), and you estimate your speed of advance at 25 knots. The distance is 6,762 miles. What is your estimated zone time of arrival at New York?

    N a. 1200, 31 December
    N b. 1100, 31 December
    N c. 0700, 31 December
    Y d. 0600, 31 December

621: You are on a voyage from New York, NY, to San Francisco, CA. The distance from pilot to pilot is 5132 miles. The speed of advance is 13.5 knots. You estimate 32 hours for bunkering at Colon, and 14 hours for the Panama Canal transit. If you take departure at 0600 hours (ZD +4), 16 May, what is your ETA (ZD +7) at San Francisco?

    N a. 0609, 1 June
    Y b. 2109, 2 June
    N c. 0009, 3 June
    N d. 0409, 3 June

818: On 30 December , in DR position LAT 2824.0'S, LONG 3215.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 02h 09m 16s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 8403.3'. The index error is 3.5' off the arc, and your height of eye is 62.0 feet. What is the latitude at meridian transit?

    N a. LAT 2850.6'S
    Y b. LAT 2851.9'S
    N c. LAT 2854.2'S
    N d. LAT 2856.6'S

1094: On 12 Oct. , your vessel is on course 081T, speed 20 knots. Your 1800 zone time DR position is LAT 2611.0'S, LONG 7718.0'E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1835 running fix. NP-0024

    N a. LAT 2605.5'S, LONG 7714.5'E
    N b. LAT 2607.5'S, LONG 7734.0'E
    N c. LAT 2609.0'S, LONG 7727.5'E
    Y d. LAT 2612.0'S, LONG 7731.0'E

1300: 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

1488: At 2326 ZT, on 22 June , your vessel's position is LAT 2830'N, LONG 15004'W. An azimuth of the planet Jupiter is observed, and the standard compass bearing is 250.4. The chronometer reads 09h 24m 36s and is 01m 12s slow. The variation of this area is 13.5E. What is the deviation of the standard compass?

    N a. 3.0W
    N b. 3.5W
    N c. 1.5E
    Y d. 2.3E

1650: On 22 October , in DR position LAT 2151.0'S, LONG 7624.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2E. What is the deviation of the standard magnetic compass?

    N a. 0.3E
    Y b. 0.3W
    N c. 2.0E
    N d. 2.0W

1897: On 22 June , your 0424 DR position is LAT 2618.5'N, LONG 12418.2'W. You observe an unidentified star bearing 249T at an observed altitude (Ho) of 5250.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?

    N a. Peacock
    N b. Schedar
    N c. Ankaa
    Y d. Altair

2021: On 29 April , your 0300 ZT DR position is LAT 2839'N, LONG 16803'E. You are on course 108T at a speed of 22 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

    Y a. Moon, Alpheratz, Polaris
    N b. Deneb, Dubhe, Zubenelgenubi
    N c. Venus, Polaris, Arcturus
    N d. Moon, Altair, Sabik

2089: At your current speed of 18 knots you only have enough fuel remaining to travel 316 miles. You must travel 731 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?

    N a. 10.4
    Y b. 11.8
    N c. 13.2
    N d. 14.6

2118: You are northwest of Port Jefferson Harbor steering 242
per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________.

    N a. 140psc
    N b. 146psc
    Y c. 157psc
    N d. 160psc

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 101.2psc. The variation is 5 E. What is the deviation?

    Y a. 1.5E
    N b. 1.5W
    N c. 0.5E
    N d. 0.5W

2462: You have steamed 504 miles at 21 knots and burning 633 barrels of fuel per day. You must decrease your consumption to 410 barrels per day with 399 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?

    N a. 20.1
    Y b. 19.0
    N c. 16.2
    N d. 15.0

2708: While on a course of 349T, a light bears 13 on your starboard bow at a distance of 10.8 miles. What course should you steer to pass 2.5 miles abeam of the light, leaving it to starboard?

    N a. 323
    N b. 336
    Y c. 349
    N d. 002

2854: Your vessel is on a course of 221T at 15 knots. At 0319 a light bears 198.5T, and at 0353 the light bears 176T.
At what time and at what distance off will your vessel be when abeam of the light?

    N a. 0407, 4.3 miles
    N b. 0410, 5.2 miles
    Y c. 0417, 6.0 miles
    N d. 0427, 7.4 miles

2887: Your vessel is steering 283T at 10 knots. At 0538 a light bears 350T, and at 0552 the same light bears 002T. 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 114T at 17 knots. At 1122 you observe a lighthouse bearing 077T. At 1133 the lighthouse bears 051T. 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

3608: You are steering 125pgc. The wind is southwest by south causing a 3 leeway. The variation is 6E, the deviation is 2W, and the gyro error is 1W. What is the true course made good?

    Y a. 121T
    N b. 123T
    N c. 127T
    N d. 129T

3635: You desire to make good a true course of 236. The variation is 8E, magnetic compass deviation is 1E, and gyrocompass error is 3W. A south-southeasterly wind produces a 1 leeway. What is the course to steer per standard magnetic compass (psc) to make the true course good?

    Y a. 226psc
    N b. 228psc
    N c. 244psc
    N d. 246psc

3762: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 196T, and the variation is 7E. If the heading of your vessel at the time of the sighting is 192 per standard magnetic compass, what is the deviation?

    N a. 3E
    Y b. 3W
    N c. 4E
    N d. 4W

10606: At 0915 your GPS position is LAT 4104.9'N, LONG 7242.1'W. You are on course 085 per standard magnetic compass at a speed of 6 knots. At 1030 your GPS position is 0.5 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift?

    N a. 042T at 2.4 knots
    Y b. 045T at 1.9 knots
    N c. 221T at 2.0 knots
    N d. 225T at 2.3 knots

11708: Your position is LAT 3700.9'N, LONG 7530.0'W. What is the course to steer per magnetic compass to arrive at LAT 3659.0'N, LONG 7548.5'W, if you are turning for 7.8 knots the current is 339T at 1.3 knots, and a northwesterly wind is causing 3 of leeway?

    Y a. 265psc
    N b. 267psc
    N c. 269psc
    N d. 271psc

11811: What is the true course to steer between Horton Pt. Light and a position 2 miles due south of Branford Reef Light, if the set and drift of the current are 40T at 1.5 knots, and an easterly wind will cause 3 of leeway? Your engines are making turns for 12 knots.

    N a. 277T
    N b. 283T
    Y c. 287T
    N d. 291T

13004: At 1815 your position is LAT 4105.5'N, LONG 7247.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT 4113.3'N, LONG 7210.8'W)?

    N a. 2019
    N b. 2028
    Y c. 2032
    N d. 2038

13101: At 1523 your position is LAT 4108.2'N, LONG 7134.4'W. You are turning for 8.7 knots. What is your ETA at Shagwong Reef Buoy "7SR"?

    N a. 1653
    N b. 1700
    Y c. 1711
    N d. 1718

15162: At 1920, Cape Henry Light bears 231pgc, and Chesapeake Channel Tunnel North Light bears 294pgc. If your heading is 268T, what is the relative bearing of Chesapeake Light?

    Y a. 213
    N b. 201
    N c. 194
    N d. 179

15169: At 2123, your position is LAT 3720.0'N, LONG 7603.0'W. What is your distance offshore of Savage Neck?

    Y a. 1.7 miles
    N b. 2.5 miles
    N c. 3.6 miles
    N d. 10.9 miles

15338: At 1705 Race Rock Light bears 099True; Orient Point Light bears 176True; Bartlett Reef Light bears 083True. What is your vessel's position?

    N a. LAT 4115.0'N, LONG 7214.3'W
    N b. LAT 4115.4'N, LONG 7216.6'W
    Y c. LAT 4115.9'N, LONG 7214.0'W
    N d. LAT 4116.4'N, LONG 7214.2'W

15624: The Gage at Red River Landing reads 22.2 feet. The low water reference plane for Red River is 10.6 feet. How many feet is this above the low water reference plane?

    N a. 10.6 ft
    Y b. 11.6 ft
    N c. 22.2 ft
    N d. 32.8 ft

15867: You anticipate a maximum flood current north of Stratford Shoal. You will be set in which general direction?

    N a. Northerly
    N b. Easterly
    N c. Southerly
    Y d. Westerly

15970: If you have 16.3 miles to reach your destination from your 2000 position and want to be there at 2230, what speed should you make good?

    N a. 5.7 knots
    N b. 6.1 knots
    Y c. 6.5 knots
    N d. 6.9 knots

16059: At 1800, Tue Marshes Light bears 270pgc, and York Spit Swash Channel Light "3" bears 007pgc. Your position is __________.

    N a. LAT 3714.0'N, LONG 7619.8'W
    N b. LAT 3714.2'N, LONG 7620.3'W
    Y c. LAT 3714.2'N, LONG 7620.1'W
    N d. LAT 3714.5'N, LONG 7620.0'W

16061: 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?

    N a. Mobjack Bay Entrance Light
    Y b. York Spit Light
    N c. New Point Comfort Light
    N d. York River Entrance Channel Light "1"

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

16739: What is the earliest time you should sight Montauk Point Light (nominal range - 24 miles) if you are turning for 9.2 knots? Visibility is 5 nautical miles.

    Y a. The light is visible at 2212
    N b. 2221
    N c. 2243
    N d. You will not sight the light on this course.