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.


113: What is indicated by the two light gray shaded areas that cross the river above False River Lt. (mile 251.0 AHP)?


164: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?


208: 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 be best for position determination?


212: If you were to head into Fishers Island Sound, which of the following charts would you switch to for better detail of Mystic and Mystic Harbor?

    N a. 13209
    N b. 13212
    Y c. 13214
    N d. 13215

307: A vessel at LAT 28°00'N, LONG 116°00'W is to proceed to LAT 34°00'N, LONG 123°40'W. What is the course and distance by mid-latitude sailing?

    N a. 323°T, 428 miles
    N b. 324°T, 453 miles
    Y c. 312°T, 533 miles
    N d. 302°T, 539 miles

324: The mean high water level at Old Point Comfort is __________.

    N a. 3.3 feet (1.1 meters)
    Y b. 2.6 feet (0.8 meters)
    N c. 1.2 feet (0.4 meters)
    N d. 0.0

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

426: The broken magenta line which runs parallel to the shore between Roanoke Point and Mattituck Inlet marks a __________.

    Y a. fish trap area
    N b. pipeline
    N c. demarcation line
    N d. cable area

513: What is the distance from your 0200 position to the point where Twenty-Eight Foot Shoal lighted buoy is abeam to starboard?

    N a. 7.3 miles
    N b. 7.1 miles
    Y c. 6.9 miles
    N d. 6.6 miles

568: You are delayed in sailing due to engineering problems. You get underway at 0630. A Coast Guard radio broadcast advises that an aircraft carrier will transit the Elizabeth River enroute Norfolk Naval Shipyard and a safety zone is in effect. Further information on how far you must remain from the carrier found is in __________.

    N a. PUB 117
    Y b. Coast Pilot
    N c. Light List
    N d. Chart Number 1

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

    N a. Green triangle
    N b. Red and green banded square
    N c. Green square daymark
    Y d. Diamond-shaped green daymark

813: On 7 November , your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 162°19.0'W. Your vessel is on course 289°T and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the latitude at 1200 ZT?

    N a. 27°55.1'N
    N b. 27°57.2'N
    Y c. 27°59.5'N
    N d. 28°01.9'N

1079: On 12 Dec. , your 1830 ZT DR position is LAT 24°16.0'S, LONG 41°18.0'W. You are on course 235°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1930 running fix. NP-0009

    N a. LAT 24°12.5'S, LONG 41°10.9'W
    Y b. LAT 24°16.9'S, LONG 41°18.2'W
    N c. LAT 24°25.2'S, LONG 41°39.9'W
    N d. LAT 27°46.9'S, LONG 41°31.2'W

1140: At 0921, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 10.0 mph, what was the current since departure?

    N a. 3.4 mph
    N b. 2.0 mph
    Y c. 1.7 mph
    N d. 1.4 mph

1178: On 27 August , your 0900 zone time DR position is LAT 24°25.0'N, LONG 94°20.0'W. Your vessel is on course 071°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?

    Y a. 1214
    N b. 1208
    N c. 1206
    N d. 1158

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

1249: What is the white/black within a circle symbol found at mile 592.1 AHP?

    N a. Terrence Landing Light
    N b. Daymark
    Y c. River Gage
    N d. Information Board

1467: On 17 April , your 1610 ZT DR position is LAT 22°07.0'N, LONG 158°16.0'W. At that time, you observe the Sun bearing 271°psc. The chronometer reads 03h 08m 52s, and the chronometer error is 01m 16s slow. The variation is 4°E. What is the deviation of the standard magnetic compass?

    N a. 1.1°W
    N b. 1.7°E
    Y c. 2.3°W
    N d. 2.9°E

1764: The Gage at Red River Landing reads 43.4 feet. The low water reference plane (LWRP) for Red River Landing, LA. Is 10.6 ft. How many feet is this above the low water reference plane?

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

1832: Where can scheduled broadcast times of river stages be found?

    N a. Sailing Directions
    N b. List of Lights
    Y c. Light List
    N d. Coast Pilot

2051: On which map would you find Redman Point, Arkansas?

    N a. 23
    Y b. 20
    N c. 17
    N d. 5

2091: At your current speed of 22 knots you only have enough fuel remaining to travel 422 miles. You must travel 844 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?

    N a. 19.8
    N b. 18.4
    N c. 17.0
    Y d. 15.6

2126: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?

    N a. Privately maintained buoys at a yacht club
    N b. Government buoys marking the Hurricane Point dikes
    Y c. Barges moored at the Dennis Landing Terminal
    N d. A pipeline discharging dredge spoil

2168: On 22 July , at 0448 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°43.0'N, LONG 158°39.0'E. Your vessel is steaming at 21.0 knots on a course of 028°T. A sextant observation of the Sun's lower limb is made at 0956 ZT. The chronometer reads 10h 54m 27s, and the sextant altitude is 54°28.2'. The index error is 1.5' off the arc, and the chronometer error is 01m 38s slow. Your height of eye on the bridge is 56 feet. What is the azimuth (Zn) of this sight using the assumed position?

    N a. 080.9°T
    N b. 082.2°T
    N c. 084.2°T
    Y d. 086.9°T

2209: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?

    N a. 53.0 feet
    N b. 62.6 feet
    N c. 64.2 feet
    Y d. 68.0 feet

2700: You are underway on course 163°T at a speed of 15.8 knots.
You sight a buoy bearing 161°T at a radar range of 5.5 miles at 1319. If you change course at 1325, what is the course to steer to leave the buoy abeam to starboard at 1.0 mile?

    Y a. 145°T
    N b. 148°T
    N c. 151°T
    N d. 175°T

2703: You are underway on course 254°T at a speed of 16.5 knots. You sight a rock bearing 255°T at a radar range of 6.1 miles at 0916. If you change course at 0922, what is the course to steer to leave the rock abeam to starboard at 1.5 miles?

    N a. 268°T
    N b. 239°T
    Y c. 236°T
    N d. 233°T

2717: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?

    N a. 79.0 feet
    Y b. 71.7 feet
    N c. 65.2 feet
    N d. 59.1 feet

2780: Which type of daymark will you see as you approach Old Levee Light (mile 385.2 AHP)?

    N a. Green diamond
    N b. Red square
    Y c. Green square
    N d. Private aid - no daymark

3617: Your vessel is steering course 299°psc, variation for the area is 7°W, and deviation is 4°W. The wind is from the southwest, producing a 3° leeway. What true course are you making good?

    Y a. 291°T
    N b. 296°T
    N c. 299°T
    N d. 313°T

10105: What is the course psc from Chesapeake Light to North Chesapeake Entrance Buoy NCA?

    N a. 313°psc
    N b. 317°psc
    Y c. 321°psc
    N d. 325°psc

10305: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position one mile due south of Block Island Southeast Point Light?

    N a. 070.0°
    N b. 076.5°
    Y c. 082.5°
    N d. 087.5°

10606: At 0915 your GPS position is LAT 41°04.9'N, LONG 72°42.1'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. 042°T at 2.4 knots
    Y b. 045°T at 1.9 knots
    N c. 221°T at 2.0 knots
    N d. 225°T at 2.3 knots

10901: The area around Cape Charles is _______________ .

    Y a. low and bare, but the land back of it is high and wooded
    N b. composed of low to medium rolling hills
    N c. well defined with rocky outcroppings
    N d. marked by high, barren hills

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

12206: You sight Bartlett Reef Light (LAT 41°16.5'N, LONG 72°08.2'W) in line with New London Harbor Light (LAT 41°19.0'N, LONG 72°05.4'W) and bearing 059° per standard magnetic compass. What is the compass deviation?

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

12210: You sight New Haven Outer Channel Range Rear Light in line with the Outer Channel Range Front Light bearing 343° per standard magnetic compass. What is your compass error?

    N a. 5°E
    N b. 5°W
    N c. 9°E
    Y d. 9°W

13210: At 0943, your position is LAT 41°14.8'N, LONG 71°54.3'W. You are turning for 12.2 knots. What is your ETA at the entrance to Great Salt Pond on Block Island?

    Y a. 1054
    N b. 1048
    N c. 1040
    N d. 1032

13501: What type of bottom is found off the southern coast of Long Island?

    N a. Blue Mud
    N b. Shingle
    Y c. Brown Sand
    N d. Shells

13706: What is the horizontal clearance of the navigation opening of Trestle B of the Chesapeake Bay Bridge and Tunnel?

    N a. 21 feet
    Y b. 70 feet
    N c. 75 feet
    N d. 300 feet

15062: If there is no current, what is the course per standard magnetic compass from your 0802 fix to a position 1.1 miles north of Falkner Island Light?

    N a. 064°psc
    N b. 068°psc
    N c. 091°psc
    Y d. 095°psc

15238: At 0930 you obtain a position from the following information: Race Rock Light bears 110°T at a range of 1.4 miles, and Goshen Point bears 330°T at a range of 3.3 miles. What are your present latitude and longitude?

    N a. 41°16.0'N, 72°09.5'W
    Y b. 41°15.1'N, 72°04.6'W
    N c. 41°17.4'N, 72°06.0'W
    N d. 41°14.6'N, 72°03.0'W

15243: At 1245 the GPS shows your position to be LAT 41°10.3'N, LONG 72°44.2'W. You are steering a course of 284°T at an engine speed of 13.0 knots. At what time would you expect the New Haven Harbor Outer Range to be in line if you have a current setting 112°T at 1.2 knots?

    N a. 1318
    Y b. 1323
    N c. 1328
    N d. 1343

15418: At 2205, you are in Thimble Shoal North Auxiliary Channel abeam of lighted gong buoy "4". At this time the visibility decreases to 5 miles. You continue to turn RPMs for 6 knots and experience no set and drift. What time would you expect Old Point Comfort Light (white sector) to become visible?

    N a. 2230
    Y b. 2240
    N c. 2246
    N d. 2258

15607: 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"?

    N a. 190°pgc
    Y b. 193°pgc
    N c. 196°pgc
    N d. 199°pgc

15745: Your 2239 position is LAT 41°08.5'N, LONG 71°53.3'W. You change course to 315°T, and you maintain RPM's for 9 knots. At 2329 Little Gull Island Light bears 253°T, Race Rock Light bears 309°T, and Watch Hill Point Light bears 058°T. What were the set and drift of the current you experienced from your 2239 position?

    N a. 076°T at 0.75 knot
    N b. 076°T at 0.90 knot
    N c. 256°T at 0.75 knot
    Y d. 256°T at 0.90 knot

15959: What is the average velocity of the maximum ebb current in the channel west of Middle Ground?

    N a. 0.8 knot
    N b. 1.0 knot
    Y c. 1.3 knots
    N d. 1.6 knots

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

16046: The visibility is excellent. When Race Rock Light Tower breaks the horizon, how far will you be from the Tower?

    N a. 8.5 miles
    N b. 9.6 miles
    N c. 14.0 miles
    Y d. 17.9 miles

16070: When exiting Thimble Shoal Channel bound for Norfolk, the track line based on the lights of the Norfolk Entrance Reach Range is __________.

    N a. 220°T
    N b. 222°T
    Y c. 224°T
    N d. 228°T

16256: What is the course per gyro compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?

    N a. 180°
    Y b. 184°
    N c. 198°
    N d. 199.5°

16264: Which statement about your 0400 position is true?

    N a. You are governed by the Inland Rules of the Road.
    N b. Anchoring, trawling and fishing are prohibited.
    N c. The ocean floor is composed of shingle.
    Y d. You are within the Territorial Sea and the contiguous zone.