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.


292: If you have 17.3 miles to reach your destination from your 2000 position and want to be there at 2230, what speed should you make good?


303: A vessel steams 576 miles on course 260°T from LAT 40°36'N, LONG 50°24'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?


342: If the visibility is 11 miles, what is the earliest time you can expect to see New Haven Light?


505: At 0109 you get underway, and at 0112 you take the following bearings:

Branford Reef Light bearing 051° true
Stratford Point Light bearing 258° true

What is your 0112 position?

    N a. LAT 41°11.0'N, LONG 72°51.0'W
    Y b. LAT 41°11.4'N, LONG 72°51.3'W
    N c. LAT 41°11.6'N, LONG 72°51.6'W
    N d. LAT 41°11.8'N, LONG 72°51.8'W

822: On 10 March , in DR position LAT 21°42.0'S, LONG 57°28.0'E, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 08h 28m 17s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 72°08.0'. The index error is 3.4' on the arc, and your height of eye is 52.7 feet. What is the latitude at meridian transit?

    N a. LAT 21°32.5'S
    N b. LAT 21°40.6'S
    Y c. LAT 21°45.5'S
    N d. LAT 21°50.2'S

980: On 29 April , your 0530 zone time position was LAT 23°04.0'S, LONG 162°12.0'E. Your vessel was steaming on course 120°T at a speed of 9.0 knots. An observation of the Sun's upper limb was made at 0830 ZT. The chronometer read 09h 27m 32s and was slow 02m 24s. The observed altitude (Ho) was 24°58.0'. LAN occurred at 1205 zone time. The observed altitude (Ho) was 52°04.0'. What was the longitude of your 1200 zone time running fix?

    N a. LONG 163°02.1'E
    Y b. LONG 163°06.0'E
    N c. LONG 163°09.5'E
    N d. LONG 163°11.3'E

1216: It is 8 March and you are keeping zone time -3. You are on course 104°T, speed 21 knots. Your 0830 DR position is LAT 25°35.0'S, LONG 66°34.0'E. What is the time of the second estimate of LAN by ship's clocks?

    Y a. 10h 41m 26s
    N b. 11h 15m 34s
    N c. 11h 17m 32s
    N d. 11h 36m 54s

1255: On 12 June , your 0400 ZT DR position is LAT 22°31.0'N, LONG 31°45.0'W. You are on course 240°T at a speed of 16.5 knots. What will be the zone time of sunrise at your vessel?

    N a. 0507
    N b. 0515
    Y c. 0523
    N d. 0645

1274: On 13 February , at 0325 zone time, your DR position is LAT 23°20'N, LONG 155°15'W. You are steering 240°T at a speed of 13.6 knots. What is the zone time of sunrise?

    N a. 0652
    Y b. 0657
    N c. 0706
    N d. 0711

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

1485: On 6 October , your 0416 zone time DR position is LAT 25°16.0'N, LONG 130°25.0'E. At that time, you observe Mars bearing 083°psc. The chronometer reads 07h 16m 22s, and the chronometer error is 00m 10s fast. The variation is 1.5°E. What is the deviation of the standard compass?

    N a. 0.4°E
    Y b. 1.2°W
    N c. 3.5°E
    N d. 19.0°E

1501: On 3 October , your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronometer time of the observation is 08h 32m 04s, and the chronometer is 0m 27s slow. The variation is 5.5°W. What is the gyro error?

    N a. 7.5°E
    N b. 5.0°E
    N c. 3.5°E
    Y d. 2.0°E

1675: On 28 November , your vessel's 0652 DR position is LAT 37°30'N, LONG 124°12'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 103° per standard magnetic compass. Variation in the area is 16.3°E. The chronometer reads 02h 54m 18s and is 02m 06s fast. What is the deviation of the compass?

    Y a. 2.5°W
    N b. 3.0°W
    N c. 2.0°E
    N d. 3.0°E

1842: What town is located at mile 389.8 AHP?

    N a. Whitehall
    N b. Belmont
    N c. St. James
    Y d. Rodney

1921: On 17 March , your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 340°T at an observed altitude (Ho) of 66°25.1'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?

    Y a. Capella
    N b. Mirfak
    N c. Pollux
    N d. Rigel

2052: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?

    Y a. 53.2 feet
    N b. 58.1 feet
    N c. 68.2 feet
    N d. 96.3 feet

2103: On 24 August , in DR position LAT 26°49.4'N, LONG 146°19.4'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 084°psc. The chronometer reads 07h 55m 06s and is 01m 11s fast. Variation in the area is 15°W. What is the deviation of the magnetic compass?

    N a. 8.0°E
    Y b. 8.3°E
    N c. 8.5°E
    N d. 8.7°E

2207: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 8.9 ft. If the highest point on your vessel is 54 ft. above the water, what is your vertical clearance?

    Y a. 63.1 feet
    N b. 65.3 feet
    N c. 67.2 feet
    N d. 122.0 feet

2212: At 1650 you decrease speed to make good 7.1 mph. At 2020 you are __________.

    Y a. abeam of Old River Control Structure Light
    N b. entering the Vicksburg District of the U.S. Army Corps. of Engineers
    N c. at Palmetto Point
    N d. at Latitude 31°10'N

2335: You are underway and intend to make good a course of 088°T. You experience a current with a set and drift of 300°T at 2.4 knots, and a southerly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 16 knots. What will be your speed made good over your intended course of 088°T?

    N a. 13.4 knots
    Y b. 13.9 knots
    N c. 14.4 knots
    N d. 14.9 knots

2589: From the 2130 position, you steer 236°T at 10 knots. A strong northerly wind is causing 4° of leeway. What course must you steer per standard compass, to make good 236°T?

    N a. 232° psc
    N b. 240° psc
    N c. 244° psc
    Y d. 252° psc

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

2684: You are steering 173°T, and a light is picked up dead ahead at a distance of 13.9 miles at 0054. You change course to pass the light 4.5 miles off abeam to port. If you are making 21 knots, what is your ETA at the position 4.5 miles off the light?

    N a. 0122
    N b. 0125
    Y c. 0131
    N d. 0134

2707: You are underway on course 128°T at a speed of 17.6 knots. You sight a daymark bearing 126°T at a radar range of 4.3 miles at 1649. If you change course at 1654, what is the course to steer to leave the daymark abeam to starboard at 0.5 mile?

    Y a. 113°T
    N b. 116°T
    N c. 119°T
    N d. 136°T

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%

3252: You have steamed 803 miles at 13 knots, and consumed 179 tons of fuel. If you have 371 tons of usable fuel remaining, how far can you steam at 16 knots?

    Y a. 1099 miles
    N b. 1374 miles
    N c. 1833 miles
    N d. 2581 miles

3309: You have steamed 142 miles and consumed 15.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 472 miles?

    N a. 36.5 tons
    Y b. 49.9 tons
    N c. 53.8 tons
    N d. 61.4 tons

3603: You are steering 318°psc. A northeasterly wind causes 3° of leeway. The variation is 14°E and the deviation table is extracted below. What will be the true course made good?
DEVIATION TABLE
MAG HDG DEV
300° 2°E
315° 0°
330° 2°W

    N a. 301°T
    N b. 303°T
    N c. 327°T
    Y d. 329°T

10908: What is the velocity of the first maximum flood current in Lynnhaven Roads on 23 July 1983?

    Y a. 0.4 knot
    N b. 0.5 knot
    N c. 0.8 knot
    N d. 1.3 knots

11504: At 1016 your position is LAT 41°07.6'N, LONG 71°38.5'W. At 1116 your position is LAT 41°01.4'N, LONG 71°29.4'W. What was the course made good between the two positions?

    Y a. 132°T
    N b. 135°T
    N c. 140°T
    N d. 143°T

11902: What is the true course to steer between the entrance to Lake Montauk (LAT 41°04.8'N, LONG 71°56.3'W) and Winnapaug Pond entrance) LAT 41°19.6'N, LONG 71°45.8'W), if you are turning for 9.5 knots, allow for a current of 075°T at 1.2 knots, and a westerly wind is causing 3° of leeway?

    Y a. 021°T
    N b. 024°T
    N c. 027°T
    N d. 029°T

12208: You sight Stratford Pt. Light in line with the Igor I. Sikorsky Airport Aero Beacon bearing 319° per standard magnetic compass. What is the compass error?

    N a. 4°E
    N b. 10°W
    N c. 14°E
    Y d. 18°W

13809: Which chart, of the same scale, continues eastward from this chart?

    Y a. 13205
    N b. 13212
    N c. 13214
    N d. 13216

14704: At 0800 your vessel is at mile 110 on the Columbia River. Thirty minutes later your vessel is at mile 115. What is your speed in knots?

    N a. 4.3 knots
    N b. 5.7 knots
    N c. 7.8 knots
    Y d. 8.7 knots

15038: At 0705 you obtained the following Loran readings:

9960-X-27091.2
9960-Y-41612.8
9960-Z-58744.2

What is your vessel's position?

    N a. 37°20.4'N 75°30.2'W
    Y b. 37°20.8'N 75°29.9'W
    N c. 37°21.3'N 75°29.5'W
    N d. 37°21.2'N 75°30.4'W

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

15264: 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. What will serve to keep your vessel in safe water and away from these hazards?

    N a. Maintaining a 7 nm range off Orient Point
    Y b. Danger bearing to Black Point of not more than 064°T
    N c. A bearing to Little Gull Island Light of not less than 090°
    N d. A distance to Saybrook Breakwater Light of not less than 1.3 miles

15269: New London Harbor is __________.

    Y a. limited to vessels drawing less than 36 feet (10.8 meters)
    N b. closed during the winter season
    N c. subject to dangerous freshets in the fall
    N d. difficult to enter at night

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

    N a. LAT 41°15.0'N, LONG 72°14.3'W
    N b. LAT 41°15.4'N, LONG 72°16.6'W
    Y c. LAT 41°15.9'N, LONG 72°14.0'W
    N d. LAT 41°16.4'N, LONG 72°14.2'W

15413: From your 1915 fix you come right and steer a course of 200°T. At 2000, your position is LAT 37°05.5'N, LONG 76°07.0'W. Your intention is to pass through Chesapeake Channel. If there are no set and drift, what course would you steer per standard magnetic compass to make good a course of 145°T?

    N a. 134°
    N b. 139°
    N c. 151°
    Y d. 156°

15613: Which statement concerning your 1920 position is TRUE?

    Y a. You are entering a restricted area.
    N b. You are governed by the Inland Rules of the Road.
    N c. You are within the Chesapeake Bay Entrance traffic separation scheme.
    N d. You can expect differences of as much as 6° from the normal magnetic variation of the area.

15615: At 2000, your position is LAT 37°04.1'N, LONG 76°05.6'W. You change course for the Eastern Shore. At 2037, Old Plantation Flats Light bears 033°pgc, and York Spit Light bears 282°pgc. The course made good from your 2000 position is __________.

    Y a. 359°T
    N b. 006°T
    N c. 014°T
    N d. 020°T

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)

15706: At 0700, Stratford Shoal Middle Ground Light bears 137°
pgc. From your radar, you get a bearing of 007°pgc to the south tip of Stratford Point with a range of 4.5 miles. What is your 0700 position?

    N a. LAT 41°04.6'N, LONG 73°07.0'W
    N b. LAT 41°04.6'N, LONG 73°07.4'W
    Y c. LAT 41°04.7'N, LONG 73°07.2'W
    N d. LAT 41°04.8'N, LONG 73°07.0'W

15765: The wind is northerly, and you estimate 3° leeway. Allowing for leeway what is the course to steer per gyro compass from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"?

    Y a. 077°pgc
    N b. 082°pgc
    N c. 085°pgc
    N d. 087°pgc

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°

15916: If you correct for the current in the preceding 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. 1016
    N b. 1021
    Y c. 1026
    N d. 1030

15960: From your 1752 position, you steer 313°pgc at 9 knots. At 1805, you obtain the following visual bearings:
Old Pt. Comfort Light - 238°pgc.
Chesapeake Bay Tunnel North Light - 136°pgc.
What are the latitude and longitude of your 1805 position?

    Y a. LAT 37°05.9'N, LONG 76°08.0'W
    N b. LAT 37°06.0'N, LONG 76°08.4'W
    N c. LAT 37°05.0'N, LONG 76°08.7'W
    N d. LAT 37°06.1'N, LONG 76°08.1'W

16369: As you pass between Trestle B and Trestle C of the Chesapeake Bay Bridge - Tunnel, you sight along Trestle C when it is in line. The gyro bearing is 051°. What is the gyro error by observation?

    N a. 4°E
    N b. 2°E
    N c. 0°
    Y d. 2°W

16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?

    Y a. 194°psc
    N b. 190°psc
    N c. 187°psc
    N d. 180°psc

16708: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?

    Y a. 263°psc
    N b. 258°psc
    N c. 233°psc
    N d. 227°psc