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.


93: Which light characteristics does Quaker Oats Light (mile 952.6) have?


101: At 1430 on 13 August, you pass Carolina Landing Light (mile 508.8 AHP). What has been the average current since 0230, 13 August if you have been making turns for 8.0 mph?


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


215: As an option to heading into Long Island Sound, you consider anchoring in the vicinity of the Gardiners Point Ruins at the north end of Gardiners Island. What is the minimum recommended distance from the ruins for fishing, trawling, or anchoring?

    N a. 1.0 mile
    N b. 0.8 mile
    N c. 0.5 mile
    Y d. 300 yards (91 meters)

309: A vessel at LAT 14°10'N, LONG 61°00'W is to proceed to LAT 10°00'N, LONG 53°23'W. What is the course and distance by mid-latitude sailing?

    N a. 117.3°T, 503.0 miles
    N b. 117.9°T, 504.0 miles
    N c. 118.6°T, 508.0 miles
    Y d. 119.2°T, 512.0 miles

323: 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. 2258
    N b. 2246
    Y c. 2240
    N d. 2230

338: You passed Cape Henry Light at 0730 outbound at maximum flood. What approximate current can you expect on entering Chesapeake Channel?

    N a. Slack before ebb
    N b. Slack before flood
    Y c. Flood current
    N d. Ebb current

362: At 0530, the Coast Guard announces that Chesapeake Channel is closed indefinitely due to a collision occurring in the channel between Trestle "B" and "C" of the Chesapeake Bay Bridge and Tunnel. You exit York Spit Channel, leaving buoy "20" abeam to port at 0.1 mile, and alter course to leave Horseshoe Crossing Lighted Bell Buoy abeam to port at 0.2 mile. What is the course per gyrocompass?

    Y a. 193°pgc
    N b. 190°pgc
    N c. 187°pgc
    N d. 185°pgc

389: Which statement describes the shore between Watch Hill Point and Point Judith?

    N a. Low, rocky cliffs
    N b. Heavily wooded hills
    Y c. Sandy beaches broken by rocky points
    N d. Barren hills with prominent buildings

471: The great circle distance from LAT 35°57.2'N, LONG 05°45.7'W to LAT 24°25.3'N, LONG 83°02.6'W is 3966.5 miles and the initial course is 283.7°T. The latitude of the vertex is 38°09.4'N. What is the longitude of the vertex?

    N a. 28°02.6'W
    Y b. 28°18.2'W
    N c. 28°46.3'W
    N d. 28°54.7'W

472: The great circle distance from LAT 38°17.0'N, LONG 123°16.0'W to LAT 35°01.0'N, LONG 142°21.0'E is 4330 miles and the initial course is 300.9°T. The latitude of the vertex is 47°40.5'N. What is the longitude of the vertex?

    N a. 173°04.6'E
    N b. 167°18.0'E
    N c. 173°04.6'W
    Y d. 167°18.5'W

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

1084: On 4 Dec. , your 1500 ZT DR position is LAT 18°06.0'N, LONG 75°42.0'W. You are on course 020°T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1548 running fix.

    N a. LAT 18°10.3'N, LONG 75°34.5'W
    N b. LAT 18°12.6'N, LONG 75°42.0'W
    N c. LAT 18°14.0'N, LONG 75°40.0'W
    Y d. LAT 18°17.3'N, LONG 75°37.7'W

1103: On 25 August , your 0300 zone time DR position is LAT 21°28.0'N, LONG 167°48.0'E. You are on course 248°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0032

    N a. LAT 20°52.4'N, LONG 167°32.1'E
    Y b. LAT 20°57.1'N, LONG 167°01.0'E
    N c. LAT 20°59.5'N, LONG 166°54.8'E
    N d. LAT 21°06.0'N, LONG 167°10.9'E

1118: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?

    Y a. 1190 X 75 feet
    N b. 1185 X 84 feet
    N c. 1190 X 84 feet
    N d. 1185 X 75 feet

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

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

1194: On 16 January your 0930 ZT DR position is LAT 26°07.0'S, LONG 51°43.0'E. Your vessel is on course 238°T at a speed of 17.0 knots. What is the ZT of local apparent noon (LAN)?

    Y a. 1145
    N b. 1148
    N c. 1152
    N d. 1156

1194: On 16 January your 0930 ZT DR position is LAT 26°07.0'S, LONG 51°43.0'E. Your vessel is on course 238°T at a speed of 17.0 knots. What is the ZT of local apparent noon (LAN)?

    Y a. 1145
    N b. 1148
    N c. 1152
    N d. 1156

1288: What is NOT true about the yellow square at mile 227.3 AHP?

    N a. Yellow in color
    N b. Square in shape
    Y c. Lighted
    N d. Part of Intracoastal Waterway System

1366: On which river is New Providence, TN located?

    N a. Allegheny
    N b. Upper Mississippi
    N c. Ohio
    Y d. Cumberland

1857: On 22 May , your 0437 ZT DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 097°T at an observed altitude (Ho) of 48°20.0'. The chronometer reads 07h 40m 40s and is 03m 24s fast. What star did you observe?

    Y a. Markab
    N b. Diphda
    N c. Sabik
    N d. Hamal

2124: If the visibility is 10 miles and you are in the red sector, at what distance off should you sight Cape Henry Light?

    Y a. 15 miles
    N b. 12 miles
    N c. 10 miles
    N d. 08 miles

2285: You observe the lower limb of the Sun at a sextant altitude (hs) of 45°49.7' on 13 November . The index error is 1.0' on the arc. The height of eye is 61 feet (18.6 meters). What is the observed altitude (Ho)?

    N a. 45°59.3'
    Y b. 45°56.4'
    N c. 45°52.9'
    N d. 45°49.8'

2500: You are underway and intend to make good a course of 227°T. You experience a current with a set and drift of 350°T at 2.1 knots, and a northwest wind produces a leeway of 5°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 11 knots. What will be your speed made good over your intended course of 227°T?

    N a. 18.5 knots
    N b. 18.1 knots
    N c. 17.6 knots
    Y d. 17.2 knots

2578: On 12 November, you are taking a time tick using the 1600 GMT BBC Broadcast. You hear five pulses followed by a longer pulse. At the start of the longer pulse you start a stopwatch. You stop the stopwatch at the same time reading the chronometer with the following results: stopwatch 03m 19s, chronometer 15h 59m 46s. What is the chronometer error?

    N a. 01m 14s slow
    N b. 03m 19s fast
    Y c. 03m 33s slow
    N d. 06m 54s slow

2895: You are steaming on a course of 246°T at 17 knots. At 2107 you observe a lighthouse bearing 207°T. At 2119 the lighthouse bears 179°T. What is your distance off at the second bearing?

    N a. 3.9 miles
    N b. 4.2 miles
    Y c. 4.6 miles
    N d. 5.1 miles

3106: You are turning 85 RPM, with a propeller pitch of 19 feet, and an estimated slip of +3%. What is the speed of advance?

    N a. 14.7 knots
    Y b. 15.5 knots
    N c. 16.4 knots
    N d. 17.1 knots

3292: Your vessel consumes 215 barrels of fuel per day at a speed of 18.0 knots. What will be the fuel consumption of your vessel at 14.0 knots?

    N a. 67 bbls
    Y b. 101 bbls
    N c. 130 bbls
    N d. 167 bbls

3451: You are underway and intend to make good a course of 040°T. You experience a current with a set and drift of 190°T at 1.4 knots, and a northwest wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 10 knots. What will be your speed made good over your intended course of 040°T?

    N a. 7.8 knots
    Y b. 8.8 knots
    N c. 9.8 knots
    N d. 11.0 knots

3610: While enroute from Sydney to the Panama Canal a vessel's true course is 071°. Variation is 14°E. Deviation is 4°W. A northerly breeze causes 2° leeway. What course would you steer psc in order to make good the true course?

    Y a. 059°psc
    N b. 061°psc
    N c. 063°psc
    N d. 079°psc

11101: Great Salt Pond on Block Island is __________.

    Y a. entered through a dredged cut
    N b. not accessible in easterly gales
    N c. available for vessels up to a maximum draft of 8 feet (2.4m)
    N d. not affected by the tide

11400: At 1035 your GPS position of LAT 41°05.3'N, LONG 72°33.7'W. At 1103 your position is LAT 41°09.0'N, LONG 72°40.0'W. What was your speed made good?

    N a. 6.1 knots
    N b. 9.5 knots
    Y c. 13.0 knots
    N d. 14.8 knots

11904: What is the true course to steer between the entrance to Winnapaug Pond (LAT 41°19.6'N, LONG 71°45.8'W) and the entrance to Lake Montauk (LAT 41°04.8'N, LONG 71°56.3'W), if you are turning for 6.5 knots, allow for a current of 295°T at 0.9 knot, and an easterly wind is causing 4° of leeway?

    Y a. 196°T
    N b. 200°T
    N c. 213°T
    N d. 217°T

12205: Your vessel is steady on a heading of 160° per standard magnetic compass when you sight Southwest Ledge Light and New Haven Outer Channel Range Rear Light in line dead astern. What is the deviation of the compass based on this observation?

    Y a. 2°E
    N b. 2°W
    N c. 5°E
    N d. 5°W

12709: You are on course 157° per standard magnetic compass when you take the following bearings: Little Gull Island Light 276°psc Race Rock Light 301°psc Latimer Reef Light 028°psc What is your position?

    N a. LAT 41°13.5'N, LONG 71°57.9'W
    Y b. LAT 41°13.5'N, LONG 71°57.4'W
    N c. LAT 41°13.6'N, LONG 71°57.0'W
    N d. LAT 41°13.6'N, LONG 71°57.8'W

15028: At what time would you listen to VHF Channel 22 (157.1 MHz) for information concerning the stage of the river between Memphis and Cairo?

    N a. 1115
    N b. 1235
    Y c. 1300
    N d. 1815

15056: You are in New Haven Outer Channel and sight the range markers in line directly over the stern. Your heading at the time is 168° per standard magnetic compass. What is the magnetic compass error?

    Y a. 15°W
    N b. 1°W
    N c. 1°E
    N d. 0°

15408: From your 1430 fix, you order turns for 8 knots. You steer 045°T and experience no set and drift. At what time would you expect to have New Point Comfort Spit Light "4" abeam?

    N a. 1452
    Y b. 1458
    N c. 1504
    N d. 1510

15809: At 0045, you obtain the following bearings:

Rocky Point lookout tower 072°T
Horton Point lighthouse 213°T

What were the set and drift between 0005 and 0045?

    N a. 272°true, 0.9 knot
    N b. 272°true, 1.4 knots
    N c. 092°true, 0.9 knot
    Y d. 092°True, 1.4 knots

15824: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?

    N a. 1445, 20 April
    N b. 1830, 20 April
    Y c. 0028, 21 April
    N d. 0821, 21 April

15856: What type of bottom is found at Long Sand Shoal?

    N a. Rocky
    Y b. Hard
    N c. Sandy
    N d. Muddy

15906: 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?

    N a. 1.0°E
    N b. 1.0°W
    Y c. 2.0°W
    N d. 0°

16112: At 0530, the Coast Guard announces that Chesapeake Channel is closed indefinitely due to a collision occurring in the channel between Trestle "B" and "C" of the Chesapeake Bay Bridge and Tunnel. You exit York Spit Channel, leaving buoy "20" abeam to port at 0.1 mile, and alter course to leave Horseshoe Crossing Lighted Bell Buoy abeam to port at 0.2 mile. What is the course per gyrocompass?

    N a. 185°pgc
    N b. 187°pgc
    N c. 190°pgc
    Y d. 193°pgc

16118: You will enter waters governed by the International Rules when __________.

    N a. you cross the territorial sea boundary line
    N b. abeam of buoy "CBJ"
    N c. you cross the boundary of the contiguous zone
    Y d. Cape Charles Light bears 022°T

16142: At 1949 Little Gull Island Light bears 270°T and is 1.7 miles off. From this position, you change course to 118°T and increase engine speed to 18 knots. If you make good your course and speed, at what time should Shagwong Reef Lighted Bell Buoy "7SR" bear 180°T?

    Y a. 2016
    N b. 2019
    N c. 2022
    N d. 2025

16306: At 0345, you set a course to depart New London Harbor. Assuming no set and drift, which standard magnetic compass course must you steer to stay in the middle of the channel?

    N a. 175°psc
    Y b. 187°psc
    N c. 190°psc
    N d. 192°psc

16562: At 1850, you obtain the following bearings and distance:

Block Island North Light 085°T
Watch Hill Light 342°T 5.8 miles

What true speed did you make good between 1830 and 1850?

    N a. 2.9 knots
    N b. 5.7 knots
    Y c. 8.0 knots
    N d. 8.7 knots

16607: You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time will you sight New Haven Light if the visibility is 11 miles?

    N a. The light is visible at 2114.
    N b. 2140
    N c. 2152
    Y d. 2159

16643: At 0520 your position is LAT 41°07.2'N, LONG 71°41.6'W. You set course to leave Race Rock Light abeam to starboard at 0.5 mile. What is the course to steer per standard magnetic compass? (Assume no current)

    N a. 301.5°
    N b. 305.0°
    Y c. 307.5°
    N d. 309.0°

16713: At 0600 you take the following bearings:

Point Judith Light bearing 063°pgc
Block Island North Reef Light bearing 144°pgc

What is your 0600 position?

    N a. LAT 41°18.1'N, LONG 71°38.3'W
    Y b. LAT 41°18.3'N, LONG 71°38.7'W
    N c. LAT 41°18.4'N, LONG 72°38.1'W
    N d. LAT 41°18.5'N, LONG 71°38.9'W

16714: What was the current between 0520 and 0600?

    N a. 201° at 1.0 knot
    N b. 201° at 1.5 knot
    N c. 021° at 1.0 knot
    Y d. 021° at 1.5 knots