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.


79: The map shows a circle with two black quadrants located at mile 846.4 AHP. What does this indicate?


225: From your 1920 position, you change course to enter Chesapeake Channel between buoys 9 and 10. What is the course per standard magnetic compass (psc) ?


263: As you enter the New Haven Outer Channel, you sight the range markers in line directly over the stern. Your heading at the time is 155.5° per gyrocompass. What is the gyro error?


343: While on a heading of 082°T, you sight Middle Ground Light in line with Old Field Point Light bearing 206° per standard magnetic compass. From this you can determine the __________.

    Y a. deviation table is correct for that heading
    N b. variation
    N c. compass error is 17.5°E
    N d. deviation is 3.5°E for a bearing of 206° per standard magnetic compass

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

562: At 0700, Falkner Island Light bears 023°pgc, and the range to the south tip of Falkner Island is 7.1 miles. What was the course made good since 0615?

    N a. 087°T
    N b. 084°T
    Y c. 081°T
    N d. 078°T

631: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?

    N a. 38.5 feet (11.7 meters)
    N b. 43.5 feet (13.2 meters)
    N c. 51.0 feet (15.5 meters)
    Y d. 59.5 feet (18.0 meters)

687: What is the distance from Cairo,IL, to Parkersburg, WV?

    Y a. 795 miles
    N b. 733 miles
    N c. 597 miles
    N d. 537 miles

687: What is the distance from Cairo,IL, to Parkersburg, WV?

    Y a. 795 miles
    N b. 733 miles
    N c. 597 miles
    N d. 537 miles

1127: You are turning for 6.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?

    N a. 6.8 mph
    Y b. 7.8 mph
    N c. 8.8 mph
    N d. 9.4 mph

1145: The Memphis Gage reads 18.4 feet. The high point of your towboat is 48 feet above water. What is the vertical clearance as you pass under the Memphis Highway Bridge?

    N a. 75.4 feet
    N b. 66.4 feet
    N c. 53.8 feet
    Y d. 46.4 feet

1197: On 16 November , your 0800 ZT DR position is LAT 25°11.0'N, LONG 117°41.0'W. Your vessel is on a course of 252°T at a speed of 14.5 knots. What is the ZT of local apparent noon (LAN)?

    N a. 1135
    Y b. 1139
    N c. 1143
    N d. 1146

1281: On 2 January , you are on a course of 094°T at a speed of 20 knots. At 0430 ZT, your DR position is LAT 24°12'N, LONG 71°24'W. Determine the zone time of sunrise.

    Y a. 0627
    N b. 0636
    N c. 0644
    N d. 0701

1472: On 9 February , your 0739 zone time DR position is LAT 23°31.0'N, LONG 143°41.0'E. At that time, you observe the Sun bearing 104.5°psc. The chronometer reads 09h 37m 12s, and the chronometer error is 01m 52s slow. The variation is 3.5°W. What is the deviation of the standard magnetic compass?

    N a. 1.6°E
    N b. 2.3°W
    N c. 5.1°W
    Y d. 8.6°E

1651: On 23 October , in DR position LAT 21°13.0'N, LONG 152°18.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 259°psc. The chronometer reads 07h 21m 46s and is 01m 32s slow. Variation in the area is 5°E. What is the deviation of the magnetic compass?

    N a. 0.9°E
    N b. 1.5°W
    Y c. 5.9°W
    N d. 6.5°E

1678: On 2 January , your vessel's 1948 zone time position is LAT 21°42'S, LONG 39°12'W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 260° per standard magnetic compass. Variation in the area is 19°W. The chronometer reads 10h 44m 36s and is 03m 24s slow. What is the deviation of the standard magnetic compass?

    Y a. 4.3°E
    N b. 4.3°W
    N c. 5.1°E
    N d. 5.1°W

1721: What is the total length of the trip?

    Y a. 850.6 miles
    N b. 894.8miles
    N c. 922.5 miles
    N d. 946.5 miles

1853: On 8 April , while taking observations for an evening fix, you observe an unidentified star bearing 250.7°T at an observed altitude of 51°44.8'. Your DR position at the time of the sight was LAT 22°16.0'N, LONG 157°58.3'W. The chronometer reads 05h 09m 57s and is 01m 23s slow. What star did you observe?

    N a. Betelgeuse
    N b. Aldebaran
    N c. Alnilam
    Y d. Bellatrix

1885: On 26 November , your 0535 DR position is LAT 27°18.9'S, LONG 30°18.4'E. You observe an unidentified planet bearing 037°T at an observed altitude (Ho) of 50°06.4'. The chronometer reads 03h 33m 16s and is 01m 48s slow. What planet did you observe?

    N a. Saturn
    N b. Jupiter
    Y c. Mars
    N d. Venus

1916: On 14 January , your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 250°T at an observed altitude (Ho) of 31°01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which star did you observe?

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

1925: On 23 September , your 1836 DR position is LAT 25°18'S, LONG 162°36'E. You observe an unidentified star bearing 148°T at an observed altitude (Ho) of 13°32'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. Which star did you observe?

    N a. Antares
    N b. Canopus
    Y c. Achernar
    N d. Sirius

1952: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light?

    N a. Green triangle
    Y b. Green diamond
    N c. Green square
    N d. Red-and-green banded square

1963: Which of the following statements are TRUE?

    N a. Oil well structures are listed in the Light List.
    N b. All aids to navigation with lights have lateral significance.
    Y c. On the Western Rivers, crossing marks may exhibit white lights.
    N d. All of the above.

2239: At 1610 ZT, on 14 August , in DR position LAT 33° 24.6' S, LONG 028°15.4'W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon and bears 111.0° psc. The variation is 2° E. What is the deviation?

    N a. 1.1°E
    Y b. 1.1°W
    N c. 2.1°E
    N d. 2.1°W

2442: Anchorage regulations for this area may be obtained from __________.

    N a. Office of Commander 2nd Coast Guard District
    Y b. District Engineer, Corps of Engineers, Norfolk, VA
    N c. Virginia - Maryland Pilots Association
    N d. Chesapeake Bay Port Authority, Hampton VA

2535: What is the mile point of Hickman, KY Gage?

    N a. 846.4 AHP
    N b. 889.0 AHP
    Y c. 922.0 AHP
    N d. 937.2 AHP

2587: What VHF frequency would you use to listen to a weather forecast for the eastern part of Long Island Sound?

    N a. 156.65 MHz
    N b. 156.85 MHz
    Y c. 162.475 MHz
    N d. 162.775 MHz

2716: The charts show two dashed lines crossing the river just south of St. Catherine Bar Light. What does this indicate?

    N a. Overhead power lines
    N b. Louisiana-Mississippi ferry crossings
    N c. Two railroad trestles
    Y d. Two submerged oil pipelines

2785: 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

2859: Your vessel is on a course of 307°T at 20 knots. At 0914 a light bears 284.5°T, and at 0937 the light bears 262°T.
At what time and at what distance off will your vessel be when abeam of the light?

    N a. 0950, 4.4 miles
    Y b. 0953, 5.4 miles
    N c. 0957, 6.6 miles
    N d. 1002, 7.1 miles

2877: Your vessel is steering 263°T at 22 knots. At 0413 a light bears 294°T, and at 0421 the same light bears 312°T. What will be your distance off abeam?

    N a. 3.4 miles
    Y b. 3.7 miles
    N c. 4.3 miles
    N d. 4.9 miles

2900: You are steaming on a course of 167°T at 19.5 knots. At 1837 you observe a lighthouse bearing 224°T. At 1904 the lighthouse bears 268°T. What is your distance off at the second bearing?

    N a. 8.8 miles
    N b. 9.5 miles
    Y c. 10.4 miles
    N d. 11.3 miles

3602: You are heading 328°pgc to make good a course of 332°T, allowing 3° leeway for westerly winds and 1°E gyro error. The variation is 17°E. What should your heading be by standard magnetic compass to make good 332°T.
DEVIATION TABLE
MAGNETIC HEADING DEV.
345° 1°E
330° 1°W
315° 3°W

    Y a. 315°psc
    N b. 318°psc
    N c. 343°psc
    N d. 345°psc

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

13400: You are going to anchor at Gardiners Bay in LAT 41°04.5'N, LONG 72°13.0'W. What type of bottom should you expect?

    N a. Streaked mud
    N b. Sand
    N c. Hard rocks
    Y d. Soft mud

13502: The four soundings in the vicinity of LAT 41°12.2'N, LONG 71°33.0'W, that are underlined with a bracket indicate __________.

    N a. that no bottom was found at the sounding depth indicated
    N b. a submerged rock not dangerous to surface navigation
    N c. the height a rock uncovers at low water springs
    Y d. a submerged danger that is cleared to the indicated depth by a wire drag

14001: At 1745 Lady Island Range is in line dead ahead and Government Island Upper Range is in line on your starboard bow. Your vessel is steaming in a westerly direction. At 1851 you pass under the Interstate 5 highway bridge. What speed have you averaged?

    N a. 10 mph
    Y b. 11 mph
    N c. 12 mph
    N d. 13 mph

15306: Your 0200 position is LAT 37°23.5'N, LONG 76°09.2'W. Your speed is 8 knots, and your course is 095°T. Which statement is TRUE?

    N a. The depth of the water in your vicinity is about 38 to 40 fathoms (69.1 meters to 72.7 meters).
    Y b. You are less than a mile from a sunken wreck which could interfere with your tow.
    N c. The closest major aid to navigation is New Point Comfort Light.
    N d. You will pass through a disposal area on your present course.

15439: What is your ETA off Chesapeake Bay Entrance Buoy "CB" at the entrance to the inbound lane of the traffic separation scheme?

    Y a. 2058
    N b. 2104
    N c. 2109
    N d. 2115

15619: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck?

    N a. 4.3 miles
    N b. 3.4 miles
    N c. 2.6 miles
    Y d. 1.7 miles

15665: Which action should you take to compensate for the above current?

    N a. Continue on the same course and speed.
    Y b. Alter your course to the left.
    N c. Slow to 8.5 knots.
    N d. Alter your course to the right.

15669: The area between Block Island and Montauk Point that is bounded by dashed magenta lines is a __________.

    N a. naval exercise area
    N b. fish trap area
    Y c. submerged cable area
    N d. restricted navigation area

15740: At 2000 Montauk Point Light bears 010°T. At 2030 Montauk Point Light bears 348°T. Assuming that you are making good your course of 046°T and a speed of 9 knots, what is your 2030 running fix position?

    N a. LAT 40°53.9'N, LONG 71°51.3'W
    Y b. LAT 40°54.2'N, LONG 71°50.2'W
    N c. LAT 40°55.9'N, LONG 71°49.0'W
    N d. LAT 40°56.7'N, LONG 71°48.1'W

15918: At 1038, you are 0.4 mile south of Long Sand Shoal Buoy "8A" on course 090°T when visibility is reduced to 1 mile in rain and haze. You intend to stay on 090°T until your Loran shows a reading that you can safely follow to the approaches of New London. Which of the following Loran readings will you look for?

    N a. 9960-W-14720
    N b. 9960-X-26290
    Y c. 9960-Y-43980
    N d. 9960-W-14810

15938: At 1910 you obtain the following bearings:

Bartlett Reef Light 268°T
Race Rock Light 147°T
Little Gull Island Light 198°T

Which of the following is your position at 1910?

    N a. LAT 41°17.4'N, LONG 72°05.6'W
    N b. LAT 41°17.0'N, LONG 72°07.1'W
    Y c. LAT 41°16.6'N, LONG 72°04.6'W
    N d. LAT 41°16.2'N, LONG 72°06.4'W

16144: From your 2027 position you change course to 106°T, while maintaining an engine speed of 18 knots. Your ETA at a position where Block Island Sound South Entrance Obstruction Lighted Buoy "BIS" is abeam is __________.

    N a. 2039
    N b. 2043
    N c. 2047
    Y d. 2050

16238: At 2045, buoy "GM" is at a range of 6.45 miles. Hogsland buoy "12" is at a range of 5.25 miles.

Your vessel's position is __________.

    N a. LAT 37°22.8'N, LONG 75°30.8'W
    Y b. LAT 37°22.3'N, LONG 75°31.7'W
    N c. LAT 37°22.0'N, LONG 75°29.3'W
    N d. LAT 37°21.8'N, LONG 75°30.7'W

16258: What is the course to steer per standard magnetic compass from the anchorage to point A, if easterly winds are causing 3° of leeway?

    N a. 187°
    Y b. 191°
    N c. 194°
    N d. 197°

16440: What course per gyrocompass would you need to steer from the anchorage to York Spit Channel buoy "29"?

    Y a. 172° pgc
    N b. 175° pgc
    N c. 178° pgc
    N d. 181° pgc

16614: Branford Reef is __________.

    Y a. completely submerged at all stages of the tide
    N b. a hard sand shoal
    N c. surrounded by rocks awash at low water spring tides
    N d. a small, low, sandy islet surrounded by shoal water

16644: Visibility becomes variable in patchy fog and you maintain 5 knots speed. At 0610 you sight Montauk Point Light bearing 239°pgc, and at 0630 you sight Watch Hill Point Light bearing 333°pgc. What is the position of your 0630 running fix?

    Y a. LAT 41°08.3'N, LONG 71°45.4'W
    N b. LAT 41°08.2'N, LONG 71°45.8'W
    N c. LAT 41°08.1'N, LONG 71°45.1'W
    N d. LAT 41°08.0'N, LONG 71°45.2'W

16717: At 0705, you take the following bearings:
Watch Hill Light 030.5°pgc
Latimer Reef Light 329.0°pgc
Race Rock Light 262.0°pgc

What was the true course made good between 0645 and 0705?

    N a. 252°T
    Y b. 256°T
    N c. 263°T
    N d. 266°T