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.


172: If you steer 143°pgc from your 2015 position at an engine speed of 8.0 knots, at what time would you reach a point midway between buoys "11" and "12" (ignore set and drift)?


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"?


241: Little Gull Island Light is __________.


251: You alter course from your 0045 position to head for Mattituck Breakwater Light "MI". If the visibility is 10 miles and you make good 9 knots, at what time will you lose sight of Saybrook Breakwater Light?

    Y a. 0100
    N b. 0123
    N c. 0131
    N d. The light is visible all the way to Mattituck Inlet

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 36°56.0'N, LONG 75°58.5'W
    N b. LAT 36°55.4'N, LONG 75°56.0'W
    Y c. LAT 36°56.8'N, LONG 75°55.6'W
    N d. LAT 36°57.4'N, LONG 75°54.6'W

354: The south shore of Long Island Sound from Horton Point to Orient Point is __________.

    Y a. bluff and rocky
    N b. low and marshy
    N c. marked by sandy beaches and wooded uplands
    N d. bound by gradual shoaling

374: You calculate that the current will be ebbing at the Race at 0700. You should expect to be set in which general direction at the Race?

    N a. West
    Y b. East
    N c. Northeast
    N d. North

473: The great circle distance from LAT 08°50.0'N, LONG 80°21.0'W to LAT 22°36.0'N, LONG 128°16.0'E is 7801 miles and the initial course is 318°45' T. The latitude of the vertex is 49°20.6'N. What is the longitude of the vertex?

    N a. 156°43'W
    Y b. 162°41'W
    N c. 159°32'W
    N d. 161°18'W

507: At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at 1.2 knots?

    N a. 118°
    N b. 120°
    Y c. 129°
    N d. 132°

515: You depart LAT 50°06.0'N, LONG 153°06.0'E and steam 879 miles on course 090°. What is the LONG of arrival?

    Y a. 175°56.0'E
    N b. 177°24.0'E
    N c. 178°36.0'W
    N d. 175°04.0'W

540: Determine the distance from LAT 34°18'S, LONG 172°40'E to LAT 34°18'S, LONG 152°38'E, by parallel sailing.

    Y a. 993.0 miles
    N b. 995.2 miles
    N c. 996.4 miles
    N d. 998.6 miles

635: You complete changing out your tow and get underway enroute Ark City Tank Storage (mile 554.0 AHP) to deliver the tank barges. What is the distance you must travel from Cairo Point Light?

    N a. 606.8 miles
    N b. 554.0 miles
    Y c. 399.8 miles
    N d. 202.1 miles

1005: On 18 May , your 1030 ZT DR position is LAT 20°41'N, LONG 63°32'W. You are on course 106°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.

ZONE TIME GHA DECLINATION Ho
1204 61°54.6' N 19°37.6' 88°39.7'
1210 63°24.6' N 19°37.7' 88°59.2'

    Y a. LAT 20°32.6'N, LONG 62°57.5'W
    N b. LAT 20°30.1'N, LONG 63°01.9'W
    N c. LAT 20°27.6'N, LONG 62°52.4'W
    N d. LAT 20°25.2'N, LONG 62°56.9'W

1076: On 25 Mar , your 0500 ZT DR position is LAT 28°14.0'S, LONG 93°17.0'E. You are on course 291°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0550 running fix. NP-0006

    Y a. LAT 28°15.9'S, LONG 92°56.9'E
    N b. LAT 28°19.3'S, LONG 92°59.0'E
    N c. LAT 28°06.4'S, LONG 93°02.5'E
    N d. LAT 27°53.2'S, LONG 93°17.6'E

1104: On 19 November , your 0200 zone time DR position is LAT 20°29.0'N, LONG 150°21.3'E. You are on course 136°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0033

    N a. LAT 19°30.1'N, LONG 151°06.0'E
    N b. LAT 19°31.7'N, LONG 151°04.9'E
    Y c. LAT 19°33.0'N, LONG 151°10.0'E
    N d. LAT 19°35.8'N, LONG 151°13.6'E

1283: On 5 May , your 1800 ZT DR position is LAT 26°11.5'N, LONG 65°35.0'W. You are on course 270°T at a speed of 12 knots. What will be the ZT of sunset at your vessel?

    N a. 1825
    N b. 1840
    Y c. 1857
    N d. 1901

1409: As you pass Solitude Lt. (mile 249.0 AHP) which dayboard would you see?

    N a. Green square
    Y b. Green diamond
    N c. Red triangle
    N d. Red diamond

1686: Which light characteristics does Ben Burman Lt. (mile 235.0 AHP) have?

    N a. 1 red flash every 5 seconds
    N b. 2 white flashes every 5 seconds
    N c. 2 green flashes every 5 seconds
    Y d. 2 red flashes every 5 seconds

1863: On 14 January , your 1922 ZT DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 029°T, at an observed altitude (Ho) of 29°35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?

    Y a. Elnath
    N b. Fomalhaut
    N c. Pollux
    N d. Markab

1951: As you approach Ashland Light (mile 378.1 AHP) which daymark would you see?

    Y a. Red triangle
    N b. Red diamond
    N c. Green square
    N d. Green diamond

2172: On 11 October , at 0516 ZT, morning stars were observed, and the vessel's position was determined to be LAT 23°21.0'N, LONG 139°27.0'W. Your vessel is steaming at 14.0 knots on a course of 293°T. A sextant observation of the Sun's lower limb is made at 0927 ZT. The chronometer reads 06h 30m 21s, and the sextant altitude (hs) is 39°48.7'. The index error is 2.0' on the arc, and the chronometer error is 02m 56s fast. Your height of eye on the bridge is 63.0 feet. What is the azimuth (Zn) of this sight using the assumed position?

    N a. 116.2°T
    Y b. 123.4°T
    N c. 126.2°T
    N d. 128.4°T

2238: At 1430 ZT, on 16 April , in DR position LAT 34° 03.8' N, LONG 061° 02.5'W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 095.2°psc. The variation is 12°W. What is the deviation?

    N a. 1.7°W
    N b. 1.7°E
    N c. 1.9°W
    Y d. 1.9°E

2866: Your vessel is on a course of 311°T at 21 knots. At 1957 a light bears 337.5°T, and at 2018 the light bears 356°T. At what time and at what distance off will your vessel be when abeam of the light?

    N a. 2027, 5.2 miles
    N b. 2033, 6.8 miles
    Y c. 2039, 7.4 miles
    N d. 2043, 10.3 miles

2909: You are running coastwise at 14 knots. You sight a lighthouse abeam at 0912. At 0939 the lighthouse is 4 points abaft the beam. What is your distance off at the second bearing?

    N a. 5.5 miles
    N b. 6.3 miles
    N c. 7.8 miles
    Y d. 8.9 miles

3278: While steaming at 14 knots, your vessel burns 276 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 11.7 knots?

    N a. 135 bbls/day
    Y b. 161 bbls/day
    N c. 196 bbls/day
    N d. 245 bbls/day

10601: At 1645 your GPS position is LAT 41°09.2'N, LONG 72°36.9'W. You are steering course 262° per standard magnetic compass at a speed of 12 knots. At 1721 you fix your position by plotting several compass bearings on nearby known fixed objects. These result in a position of LAT 41°07.2'N, LONG 72°44.9'W. What were your set and drift?

    N a. 040°T at 0.8 knot
    Y b. 030°T at 1.7 knots
    N c. 225°T at 0.9 knot
    N d. 242°T at 1.1 knots

10902: Fishermans Island (LAT 37°05.0'N, LONG 75°57.7'W) is __________.

    N a. privately owned
    N b. sparsely wooded and awash at spring tides
    N c. a high rocky promontory with marshy backwater
    Y d. a National Wildlife Refuge

11009: What best describes the structure from which Stratford Point Light is shown?

    N a. Brown conical tower with white horizontal band in center of light on black pier
    N b. Red conical tower on brown cylindrical pier
    N c. White octagonal house on brown cylindrical pier
    Y d. White conical tower, with brown band midway of height

11503: At 1016 your GPS position is LAT 41°07.6'N, LONG 71°37.9'W. At 1104 your position is LAT 41°00.2'N, LONG 71°29.4'W. What was the true course made good between the two positions?

    N a. 134°T
    Y b. 139°T
    N c. 143°T
    N d. 145°T

11907: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 130° at 1.2 knots, and a southerly wind causes 3° of leeway?

    N a. 112°T
    Y b. 108°T
    N c. 105°T
    N d. 102°T

11908: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 330° at 1.2 knots, and a southerly wind causes 3° of leeway?

    Y a. 117°T
    N b. 112°T
    N c. 104°T
    N d. 102°T

13405: At 0400 your vessel is dead in the water and in heavy fog. Your GPS position is LAT 41°12.1'N, LONG 72°43.5'W. Bottom samples are taken and indicate a composition of soft mud and shell. Your fathometer reads 40 feet. If the vessel draws 9 feet of water, which of the following is TRUE?

    Y a. The bottom samples and fathometer reading prove the fix is reliable.
    N b. The bottom samples and fathometer readings indicate that the fix is unreliable.
    N c. The information collected indicates that the fathometer may be in error.
    N d. The information collected indicates that the chart is most likely in error.

13807: The chart symbol depicted at LAT 40°58.5'N, LONG 72°43.4'W indicates a(n) __________.

    N a. abandoned lighthouse
    N b. light ship
    N c. wreck with only its mast visible
    Y d. wreck showing a portion of the hull above the sounding datum

15115: If the visibility is 11 miles, what is the luminous range of New Point Comfort Spit Light "4"?

    N a. 0.5 mile
    N b. 3.8 miles
    N c. 4.3 miles
    Y d. 5.0 miles

15409: At 1540, your position is LAT 37°18.4'N, LONG 76°10.5'W. Which course should you steer per gyrocompass to head for the entrance to Cape Charles City?

    N a. 109°pgc
    N b. 117°pgc
    N c. 123°pgc
    Y d. 129°pgc

15459: At 0823, Old Point Comfort Light bears 000°T at 0.6 mile. What is your 0823 position?

    Y a. LAT 36°59.5'N, LONG 76°18.4'W
    N b. LAT 36°59.0'N, LONG 76°21.6'W
    N c. LAT 36°59.0'N, LONG 76°19.6'W
    N d. LAT 36°55.5'N, LONG 76°18.6'W

15514: From your 1850 fix, you come left to a course of 280°T,
while maintaining a speed of 10 knots. Which of the following combinations of available Loran-C lines would give the best cross for position determining?

    Y a. 9960-Y and 9960-W
    N b. 9960-X and 9960-Y
    N c. 9960-W and 9960-X
    N d. All are equally good.

15545: At 2342 the gyro alarm sounds and you commence steering by standard magnetic compass. If you allow 3° leeway for southerly winds and do not correct for any existing current, what is the course to steer by standard magnetic compass to make good 068°T?

    N a. 054.0°
    N b. 079.5°
    N c. 081.0°
    Y d. 084.5°

15638: At 2009 you are leaving New London Harbor with buoy "2"
close abeam to port. What is the true course to the Race that will leave Race Rock Light 0.5 mile abeam to port?

    N a. 156°
    N b. 160°
    Y c. 164°
    N d. 168°

15722: What is your ETA at the Memphis Highway Bridge?

    N a. 0828, 22 Sept
    Y b. 1052, 22 Sept
    N c. 1405, 22 Sept
    N d. 1813, 22 Sept

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

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

15968: What was the speed made good from 1900 to 1925?

    N a. 8.5 knots
    N b. 8.7 knots
    N c. 8.8 knots
    Y d. 9.1 knots

16107: If the visibility is 5 miles and you are in the red sector,
at what distance off should you sight Cape Henry Light?

    N a. 15 miles
    N b. 13 miles
    N c. 11 miles
    Y d. 09 miles

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

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

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

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

16241: At 2129 Cape Charles Light bears 253°T, Hog Island Lighted Bell Buoy "12" bears 351°T, and Cape Charles Lighted Bell Buoy "14" bears 230°T. Which statement is TRUE?

    N a. The fathometer reads about 62 feet (18.9 meters).
    N b. The bottom is hard sand and oysters.
    N c. You are to seaward of the contiguous zone.
    Y d. You are governed by the International Rules of the Road.

16260: If your vessel draws 6.5 feet (2 meters), what is the approximate depth of water under your keel at 0320?

    N a. 52 feet (15.8 meters)
    N b. 48 feet (14.5 meters)
    N c. 44 feet (13.3 meters)
    Y d. 40 feet (12.0 meters)

16345: Where will you cross the demarcation line between the International and Inland Rules of the Road?

    N a. Between Montauk Point and Block Island
    Y b. In the Race
    N c. At the mouth of Bridgeport Harbor
    N d. Between Plum Gut and Niantic Bay

16611: At 0109 you get underway, and at 0112 you take the following set of bearings:

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

What is your 0112 position?

    N a. LAT 41°11.2'N, LONG 72°51.7'W
    N b. LAT 41°11.4'N, LONG 72°50.5'W
    Y c. LAT 41°11.4'N, LONG 72°51.3'W
    N d. LAT 41°11.8'N, LONG 72°51.5'W