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.

182: What course should you steer using the standard magnetic compass (psc) to make good the course of 192°pgc?
186: Assume set and drift have no effect on your vessel. If you change course to 187°pgc from your 1950 position, how close will you pass Cape Charles Lighted Bell Buoy "14"?
268: What publication contains information on the navigational hazards in the vicinity of Falkner Island?
284: Based on a DR, at approximately 1817 you would expect to __________. 

    N a. enter a traffic separation zone
    N b. cross a submerged pipeline
    Y c. depart a regulated area
    N d. depart a restricted area
359: You are turning for 9 knots, a westerly wind is causing 3°
of leeway, and the current is 320°T at 1.2 knots. What true course should you steer to remain in the northern leg of York Spit Channel? 

    N a. 203°T
    N b. 197°T
    Y c. 194°T
    N d. 191°T
405: You depart LAT 33°45.0'N, LONG 118°30.0'W, and steam 2216 miles on course 250°T. What is the longitude of your arrival by Mercator sailing? 

    N a. LONG 156°08.0'W
    N b. LONG 156°36.0'W
    N c. LONG 157°21.0'W
    Y d. LONG 157°31.0'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
506: At 0112, what is the approximate depth under the keel? 

    N a. 57 feet (17.3 meters)
    N b. 51 feet (15.5 meters)
    N c. 47 feet (14.2 meters)
    Y d. 38 feet (11.5 meters)
734: On 11 March , your 1846 zone time DR position is LAT 25°05.7'N, LONG 124°29.0'W. At that time you observe Polaris with a sextant altitude (hs) of 25°59.1'. The chronometer time of the sight is 02h 44m 01s, and the chronometer error is 02m 15s slow. The index error is 3.9' on the arc, and the height of eye is 42.7 feet (13.0 meters). What is your latitude by Polaris? 

    N a. 25°14.2'N
    Y b. 25°17.9'N
    N c. 25°28.1'N
    N d. 26°15.2'N
988: On 29 June , your 0800 zone time fix gives you a position of LAT 26°16.0'S, LONG 61°04.0'E. Your vessel is steaming a course of 079°T at a speed of 15.5 knots. An observation of the Sun's upper limb is made at 0905 zone time, and the observed altitude (Ho) is 25°20.1. The chronometer reads 05h 08m 12s, and the chronometer error is 02m 27s fast. Local apparent noon occurs at 1154 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 40°44.2'. Determine the vessel's 1200 zone time position. 

    Y a. LAT 26°02.0'S, LONG 62°05.0'E
    N b. LAT 26°02.0'S, LONG 62°23.2'E
    N c. LAT 26°05.1'S, LONG 62°06.3'E
    N d. LAT 25°56.0'S, LONG 62°03.0'E
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
1177: On 2 April , your 0900 zone time DR position is LAT 28°04.0'S, LONG 94°14.0'E. Your vessel is on course 316°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1138
    N b. 1143
    N c. 1146
    Y d. 1149
1186: On 16 November , your 0800 zone time DR position is LAT 25°11.0'N, LONG 117°41.0'W. Your vessel is on course 252°T at a speed of 14.5 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1131
    N b. 1135
    Y c. 1139
    N d. 1144
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
1269: At 1400 zone time, on 11 April , your DR position is LAT 25°40'N, LONG 91°00'W. You are steering 180°T at a speed of 10.0 knots. What is your zone time of sunset? 

    N a. 1812
    N b. 1816
    N c. 1820
    Y d. 1825
1282: On 1 November , your 1600 zone time DR position is LAT 27°48'S, LONG 91°26'E. Your vessel is on a course of 327°
T at a speed of 16 knots. What will be the zone time of sunset at your vessel? 

    Y a. 1813
    N b. 1821
    N c. 1829
    N d. 1836
1286: As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground, if your vessel is making turns for 10.5 mph? 

    N a. 16.5 mph
    Y b. 13.5 mph
    N c. 10.5 mph
    N d. 7.5 mph
1457: On 25 August , your 1926 zone time DR position is LAT 24°17.0'S, LONG 05°47.0'W. At that time, you observe Fomalhaut bearing 117°psc. The chronometer reads 07h 26m 52s, and the chronometer error is 00m 15s fast. The variation is 1.5°E. What is the deviation of the standard magnetic compass? 

    N a. 0.2°W
    N b. 0.4°E
    N c. 1.3°W
    Y d. 2.8°W
1477: On 27 June , your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass? 

    N a. 1.5°E
    N b. 1.9°W
    Y c. 3.0°W
    N d. 3.0°E
1644: From your 2207 position you adjust your course to arrive 0.3 mile north of Lighted Whistle Buoy "NCA". If you make good 14 knots, at what time will Cape Charles Light be abeam? 

    Y a. 2242
    N b. 2245
    N c. 2247
    N d. 2250
1650: On 22 October , in DR position LAT 21°51.0'S, LONG 76°24.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256°psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2°E. What is the deviation of the standard magnetic compass? 

    N a. 0.3°E
    Y b. 0.3°W
    N c. 2.0°E
    N d. 2.0°W
1661: On 11 May , in DR position LAT 28°13.7'N, LONG 168°36.3'E, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 283°psc. The chronometer reads 07h 13m 19s and is 02m 56s slow. Variation in the area is 13°E. What is the deviation of the standard magnetic compass? 

    N a. 5.2°W
    Y b. 5.6°W
    N c. 7.4°E
    N d. 7.8°E
1665: On 11 January , your vessel's 0655 zone time DR position is LAT 24°30'N, LONG 122°02'W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 101.0° per standard compass. Variation in the area is 11.6°E. The chronometer reads 02h 52m 48s and is 02m 12s slow. What is the deviation of the standard compass? 

    Y a. 1.4°E
    N b. 1.4°W
    N c. 4.6°E
    N d. 4.6°W
1685: As you approach Buckridge Light (mile 412.5 AHP), which type of daymark would you see on the light structure? 

    N a. Red square
    N b. Green square
    N c. Red diamond
    Y d. Green diamond
1722: You estimate the current as 2.0 mph. What is the speed over the ground? 

    N a. 4.5 mph
    Y b. 5.5 mph
    N c. 7.5 mph
    N d. 9.5 mph
1886: On 8 April , your evening DR position is LAT 22°16'N, LONG 157°58.3'W. You observe an unidentified star bearing 246°T at an observed altitude (Ho) of 58°45.5'. The chronometer reads 05h 09m 57s, and is 01m 23s slow. What star did you observe? 

    Y a. Betelgeuse
    N b. Aldebaran
    N c. Alnilam
    N d. Bellatrix
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
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
2101: On 2 January , your 1759 zone time DR position is LONG 45°17.6'W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 08h 57m 10s, and the chronometer error is 02m 16s slow. The index error is 3.5' on the arc, and the height of eye is 42.5 feet. What is your latitude by Polaris? 

    N a. 22°50.2'N
    Y b. 23°18.8N
    N c. 23°30.2N
    N d. 24°07.3'N
2331: What is the coastwise distance from your 0731 fix to Wilmington, DE (LAT 39°43.2'N, LONG 75°31.5'W)? 

    N a. 339 miles
    N b. 309 miles
    N c. 245 miles
    Y d. 221 miles
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
2702: You are underway on course 241°T at a speed of 18.2 knots.
You sight a daymark bearing 241°T at a radar range of 3.9 miles at 1006. If you change course at 1009, what is the course to steer to leave the daymark abeam to starboard at 1.0 mile? 

    N a. 218°T
    Y b. 222°T
    N c. 257°T
    N d. 260°T
3068: Your vessel's propeller has a pitch of 22'06". From 0530, 19 March, to 1930, 20 March, the average RPM was 82. The distance run by observation was 721.5 miles. What was the slip? 

    N a. +4%
    Y b. -4%
    N c. +7%
    N d. -7%
3081: If the speed necessary for reaching port at a designated time is 12.6 knots and the pitch of the propeller is 13.6 feet, how many revolutions per minute will the shaft have to turn, assuming no slip? 

    N a. 81
    N b. 85
    N c. 90
    Y d. 94
3282: While steaming at 16.3 knots, your vessel consumes 363 barrels of fuel oil per day. In order to reduce consumption to 298 barrels of fuel oil per day, what is the maximum speed the vessel can turn for? 

    N a. 12.6 knots
    N b. 13.1 knots
    N c. 14.7 knots
    Y d. 15.3 knots
3627: Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good? 

    N a. 242°T
    N b. 244°T
    N c. 246°T
    Y d. 248°T
11013: What will be the height of the tide at Horton Pt., New York, on 16 June 1983, at 1845 DST (ZD +4)? 

    N a. 0.2 foot
    Y b. 2.7 feet
    N c. 4.1 feet
    N d. 5.5 feet
11307: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 2031 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the speed made good? 

    N a. 8.2 knots
    N b. 9.3 knots
    Y c. 10.0 knots
    N d. 10.9 knots
11703: What is the true heading to steer inbound in York River Entrance Channel if your engines are turning for 9.8 knots, the current is 220°T at 1.2 knots, and a northeasterly wind causes 3° of leeway? 

    Y a. 319°T
    N b. 315°T
    N c. 301°T
    N d. 298°T
12700: You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc Race Rock Light 289°psc What is your position? 

    N a. LAT 41°13.6'N, LONG 71°54.6'W
    N b. LAT 41°13.7'N, LONG 71°53.8'W
    N c. LAT 41°13.7'N, LONG 71°54.9'W
    Y d. LAT 41°13.8'N, LONG 71°54.3'W
13106: At 1048 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at the west gap of Point Judith Harbor of Refuge if you make good 11.3 knots? 

    Y a. 1144
    N b. 1154
    N c. 1159
    N d. 1205
13504: A vessel anchoring in the middle of Cherry Harbor, 1 mile off Gardiner's Island, will find what type of bottom? 

    N a. Rocky
    N b. Shells
    Y c. Mud
    N d. Silt
14600: What is the length of The Dalles Lock on the Columbia River? 

    N a. 475 feet
    N b. 500 feet
    Y c. 675 feet
    N d. 1200 feet
15139: At what time would you expect to be abeam of Buoy "MP"? 

    N a. 2240
    N b. 2244
    Y c. 2248
    N d. 2252
15218: What is your 2118 position? 

    N a. LAT 36°57.0'N,  LONG 76°01.5'W
    Y b. LAT 36°57.4'N,  LONG 76°01.9'W
    N c. LAT 36°57.8'N,  LONG 76°01.5'W
    N d. LAT 36°58.2'N,  LONG 76°02.4'W
15246: From your 1845 position, you desire to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam at 1900. Which course and speed would you order if you allow for a 2.0 knot current with a set of 180°T? 

    N a. 205°T at  9.2 knots
    N b. 208°T at 11.4 knots
    Y c. 215°T at  9.2 knots
    N d. 225°T at 11.5 knots
15259: At 0830, you obtain the following radar information::

Branford Reef Light bearing 259° true @ 4.35 nm


What is your vessel's position? 

    N a. LAT 41°12.1'N, LONG 73°53.8'W
    N b. LAT 40°12.2'N, LONG 73°54.4'W
    N c. LAT 41°12.3'N, LONG 72°53.6'W
    Y d. LAT 41°12.4'N, LONG 72°54.0'W
15262: At 0910, your DR position is LAT 41°11.9'N, LONG 72°47.8'W. Your vessel is on course 097°T at 9.5 knots, and the weather is foggy. At 0915, Branford Reef Light is sighted through a break in the fog bearing 318°T. At 0945,
Falkner Island Light is sighted bearing 042°T. What is your 0945 running fix position? 

    N a. LAT 41°11.3'N, LONG 72°41.2'W
    N b. LAT 41°11.3'N, LONG 72°41.0'W
    Y c. LAT 41°11.5'N, LONG 72°40.7'W
    N d. LAT 41°11.6'N, LONG 72°41.0'W
15544: At 2310 your position is LAT 41°05.5'N, LONG 72°33.7'W and you change course to make good 068°T. A radar speed check using Twenty Eight Foot Shoal Buoy indicates your speed over the ground is 13.6 knots. At 2325 Horton Point Light bears 129°T. At 2341 the same light bears 194°T. What is the position of your 2341 running fix? 

    N a. LAT 41°07.9'N, LONG 72°25.9'W
    N b. LAT 41°08.3'N, LONG 72°25.8'W
    Y c. LAT 41°08.5'N, LONG 72°25.6'W
    N d. LAT 41°08.8'N, LONG 72°25.2'W
15623: At 2126, you pass Morganza Bend Light (mile 278.4 AHP).
At 0122, 4 January, you pass Red River Landing Gage (302.4 AHP). You have been turning for 7.5 mph. What is the current? 

    Y a. 1.4 MPH
    N b. 1.8 MPH
    N c. 2.7 MPH
    N d. 6.2 MPH
15815: From your 0130 position, you take the following radar ranges:

Mattituck Inlet Light @ 4.6 nm
Falkner Island Light @ 10.75


What is the latitude and longitude of the fix? 

    N a. LAT 41°00.8'N,  LONG 72°40.8'W
    N b. LAT 41°01.2'N,  LONG 72°40.4'W
    N c. LAT 41°01.6'N,  LONG 72°40.0'W
    Y d. LAT 41°02.0'N,  LONG 72°39.5'W
16011: At 0415, you take the following bearings:

Stratford Point Light 329.5°pgc
Middle Ground Light 223.5°pgc
Old Field Point Light 199.5°pgc

Which statement is TRUE? 

    Y a. You are to the right of your intended track line.
    N b. The current's drift is greater than predicted.
    N c. The course made good since 0352 is 081°T.
    N d. Your fathometer reads about 76 fathoms.
16066: Which statement concerning Thimble Shoal Channel is TRUE? 

    Y a. The project width of the main channel is 1000 feet (30.3 meters)
    N b. The channel is 14.5 miles in length.
    N c. A tow drawing 30 feet (9.1 meters) is excluded from the main channel.
    N d. Thimble Shoal Channel is in international waters.
16709: The coastline between Point Judith and Watch Hill is __________. 

    N a. steep with rocky bluffs
    N b. low and marshy
    Y c. sandy and broken by rocky points
    N d. heavily forested
16738: At 2212 your position is LAT 40° 51'N, LONG 71° 53.5'W.

What is the course to steer, per gyrocompass from your 2212 position, to leave Montauk Point Buoy "MP" abeam to port at 1 mile if easterly winds are causing 3° of leeway? 

    N a. 027°  pgc
    N b. 030°  pgc
    N c. 032°  pgc
    Y d. 035°  pgc
16839: At 0800 you reduce speed from sea speed. Speed was reduced by the time you passed abeam of Cape Charles Lighted Bell Buoy "12" at 0814. At this time Buoy "12" was abeam on your starboard side at a distance of 0.65 mile. Assuming you continue to make good your course of 202°T, what is your new speed if you pass abeam of Cape Charles Lighted Bell Buoy "14" at a distance of 1.5 miles at 0907? 

    N a. 13.6 knots
    Y b. 12.9 knots
    N c. 12.3 knots
    N d. 12.0 knots