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.

70: What is the vertical clearance of the Natchez-Vidalia Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.5 feet)?
140: If the highest point on your towboat is 52 feet and the West Memphis Gage reads 26 feet what is the vertical clearance when you pass under the Hernando Desoto Bridge (mile 736.6 AHP)?
141: Your vessel is making turns for 9.5 mph and you estimate the average current for the trip will be 2.5 mph. What will be your ETA Donaldsonville, LA?
223: At 1920, Cape Henry Light bears 225°pgc, and Chesapeake Channel Tunnel North Light bears 288°pgc. If your heading is 268°T, what is the relative bearing of Chesapeake Light? 

    N a. 206°
    Y b. 213°
    N c. 215°
    N d. 220°
248: You are southeast of Saybrook Breakwater Light passing Saybrook Bar Lighted Bell Buoy "8". This buoy marks __________. 

    N a. a sunken wreck
    N b. a bifurcation
    N c. the junction with the Connecticut River
    Y d. shoal water
373: What is your ETA at point "A"? 

    N a. 0702
    N b. 0655
    Y c. 0651
    N d. 0640
383: From point "A", you lay out an intended track line to a point where Block Island North Light bears 180°T at 2.9 miles (Point "B"). What is the length of this leg of the voyage? 

    Y a. 24.4 miles
    N b. 23.9 miles
    N c. 23.7 miles
    N d. 20.4 miles
441: You get underway at 1030. The wind is out of the SSE and you estimate 3° leeway. What course should you steer per gyrocompass to make good a desired course of 075°T? 

    Y a. 080°pgc
    N b. 078°pgc
    N c. 076°pgc
    N d. 074°pgc
542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)? 

    N a. 63°00.6'
    Y b. 63°01.5'
    N c. 63°02.9'
    N d. 63°04.1'
829: On 8 May , in DR position LAT 30°26.0'N, LONG 46°55.1'W, you take an ex-meridian observation of Dubhe. The chronometer time of the sight is 11h 10m 54s, and the chronometer error is 01m 18s slow. The sextant altitude (hs) is 58°35.0'. The index error is 1.5' on the arc, and your height of eye is 44 feet. What is the latitude at meridian transit? 

    N a. LAT 30°12.5'N
    Y b. LAT 30°19.8'N
    N c. LAT 30°27.6'N
    N d. LAT 30°35.8'N
1086: On 15 July , your vessel is enroute from Portland, OR, to Singapore, Malaysia. You are steering course 243°T and making a speed of 16 knots. Your 1845 zone time DR is LAT 27°42.0'N, LONG 167°02.0'E. You observed 3 celestial bodies. Determine the latitude and longitude of your 1945 running fix. NP-0016

    Y a. LAT 27°31.1'N, LONG 166°43.0'E
    N b. LAT 27°38.5'N, LONG 166°45.1'E
    N c. LAT 27°45.3'N, LONG 166°32.2'E
    N d. LAT 28°18.1'N, LONG 166°39.8'E
1184: On 8 April , your 0830 zone time DR position is LAT 22°49.0'N, LONG 84°37.0'W. Your vessel is on course 228°
T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)? 

    Y a. 1144
    N b. 1147
    N c. 1150
    N d. 1154
1188: On 9 February , your 0830 zone time DR position is LAT 22°19.0'N, LONG 64°37.0'E. Your vessel is on course 128°
T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)? 

    Y a. 1152
    N b. 1156
    N c. 1201
    N d. 1205
1271: At 0400 zone time, on 24 June , your DR position is LAT 23°10.0'N, LONG 085°33'W. You are steering 295°T at a speed of 10.0 knots. What is the zone time of sunrise? 

    N a. 0452
    Y b. 0458
    N c. 0504
    N d. 0510
1408: The horizontal clearance of the center span on the Baton Rouge RR and Highway 190 Bridge is __________. 

    N a. 443
    N b. 500
    Y c. 623
    N d. 748
1679: On 13 October , your vessel's 1722 zone time DR position is LAT 27°36'S, LONG 136°16'E, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 266° per standard magnetic compass. Variation in the area is 2°W. The chronometer reads 08h 24m 19s and is 01m 43s fast. What is the deviation of the standard magnetic compass? 

    N a. 2.3°E
    Y b. 2.8°W
    N c. 4.8°E
    N d. 6.8°W
1876: On 2 October , your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 11°37.6' bearing 066°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe? 

    N a. Scheat
    N b. Ruckbah
    N c. Caph
    Y d. Algenib
1904: On 22 March , your 0519 DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 115°T at an observed altitude (Ho) of 54°52.8'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe? 

    Y a. Altair
    N b. Enif
    N c. Menkar
    N d. Rigel
2004: On 28 February , your 1850 zone time DR position is LAT 27°49.0'N, LONG 159°24.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time? 

    Y a. Rigel, Schedar, Regulus
    N b. Sirius, Mirfak, Elnath
    N c. Hamal, Alkaid, Canopus
    N d. Bellatrix, Vega, Regulus
2016: On 23 March , your 1600 ZT DR position is LAT 27°16.3'N, LONG 156°48.2'W. You are on course 063°T at a speed of 18.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time? 

    N a. Arcturus, Regulus, Sirius
    N b. Procyon, Sirius, Capella
    Y c. Hamal, Rigel, Alphard
    N d. Betelgeuse, Dubhe, Regulus
2022: On 24 August , your vessel is enroute from Perth, Australia, to Bombay, India. Evening twilight will occur at 1807 zone time, and your vessel's DR position for this time will be LAT 27°17.0'S, LONG 83°17.0'E. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time? 

    N a. Arcturus, Antares, Atria
    Y b. Spica, Altair, Acrux
    N c. Pollux, Canopus, Hamal
    N d. Rasalhague, Spica, Kochab
2104: What type of bottom is found at Long Sand Shoal? 

    N a. Rocky
    N b. Muddy
    N c. Sandy
    Y d. Hard
2108: You alter course from your 0045 position to head for a point 0.5 mile north of Mattituck Breakwater Light "MI". If the visibility is 10 miles and you make good 9 knots, at approximately what time will you lose sight of Saybrook Breakwater Light? 

    N a. You have already lost sight at 0045
    Y b. 0055
    N c. 0120
    N d. The light is visible all the way to Mattituck Inlet
2403: At 0812 you obtain the following information:

Chesapeake Light bearing 091° true @ a range of 10.5 nm

What is your 0812 position? 

    N a. LAT 36°53.7'N, LONG 75°56.0'W
    N b. LAT 36°53.8'N, LONG 75°56.1'W
    Y c. LAT 36°54.4'N, LONG 75°55.9'W
    N d. LAT 36°54.6'N, LONG 75°55.8'W
2583: You lose GPS and are navigating solely on LORAN. What LORAN line would you follow to leave Six Mile Reef buoy "8C" abeam to port at 1.0 mile? 

    N a. 9960-W-14885.0
    N b. 9960-Y-43980.5
    Y c. 9960-Y-43982.0
    N d. 9960-Y-43983.5
2668: Your vessel is on a course of 255°T, at 14 knots. At 2116 a lighthouse is sighted dead ahead at a distance of 11 miles. You change course at this time to pass the lighthouse 3 miles abeam to port. What will be your ETA at this position off the lighthouse? 

    N a. 2149
    Y b. 2201
    N c. 2212
    N d. 2228
2683: You are underway on a course of 135°pgc at 15 knots, and you sight a lighthouse dead ahead at a range of 12.5 miles at 1145. What course would you steer to leave the lighthouse 3.0 miles off your port beam? 

    N a. 117°pgc
    N b. 121°pgc
    Y c. 149°pgc
    N d. 154°pgc
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
2718: What organization has an installation at the uppermost end of Carthage Revetment? 

    N a. City of Natchez (waterfront)
    Y b. River Cement Co.
    N c. J.M. Jones Lumber
    N d. International Paper Co.
2853: Your vessel is on a course of 343°T at 14 knots. At 2156 a light bears 320.5°T, and at 2217 the light bears 298°T.
At what time and at what distance off will your vessel be when abeam of the light? 

    Y a. 2232, 3.4 miles
    N b. 2235, 4.3 miles
    N c. 2228, 4.9 miles
    N d. 2241, 6.9 miles
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
3101: You are turning 100 RPM, with a propeller pitch of 25 feet, and an estimated slip of -5%. What is the speed of advance? 

    N a. 24.7 knots
    N b. 23.5 knots
    Y c. 25.9 knots
    N d. 22.3 knots
3104: You are turning 84 RPM, with a propeller pitch of 22 feet, and an estimated slip of 0%. What is the speed of advance? 

    N a. 16.8 knots
    N b. 17.7 knots
    N c. 18.0 knots
    Y d. 18.2 knots
3279: While steaming at 15.0 knots, your vessel consumes 326 barrels of fuel oil per day. In order to reduce consumption to 178 barrels of fuel oil per day, what is the maximum speed the vessel can turn for? 

    N a. 8.1 knots
    N b. 8.5 knots
    N c. 11.1 knots
    Y d. 12.2 knots
10103: Your GPS position is LAT 37°01.5'N, LONG 75°31.7'W. What is the course per standard magnetic compass to Chesapeake Light? 

    Y a. 243°
    N b. 240°
    N c. 237°
    N d. 231°
10701: At 0947 your position is LAT 41°15.9'N, LONG 71°41.7'W. You are on course 182° per magnetic compass at 11.3 knots. At 1020 your position is LAT 41°09.2'N, LONG 71°40.6'W. What were the set and drift? 

    N a. 211°T at 1.0 knot
    Y b. 229°T at 2.0 knots
    N c. 058°T at 1.8 knots
    N d. 043°T at 1.1 knots
15016: If the visibility is 3 miles, at what range will you lose sight of Chesapeake Light? 

    N a. The light has never been visible.
    N b. 6.4 miles
    Y c. 8.3 miles
    N d. 12.1 miles
15038: At 0705 you obtained the following Loran readings:

9960-X-27091.2
9960-Y-41612.8
9960-Z-58744.2

What is your vessel's position? 

    N a. 37°20.4'N 75°30.2'W
    Y b. 37°20.8'N 75°29.9'W
    N c. 37°21.3'N 75°29.5'W
    N d. 37°21.2'N 75°30.4'W
15264: At 1100, your position is LAT 41°11.3'N, LONG 72°28.0'W. You are steering a course of 069°T to leave Black Point one mile off your port beam. It has been reported that the Long Sand Shoal Buoys and Hatchett Reef Buoys are off station. What will serve to keep your vessel in safe water and away from these hazards? 

    N a. Maintaining a 7 nm range off Orient Point
    Y b. Danger bearing to Black Point of not more than 064°T
    N c. A bearing to Little Gull Island Light of not less than 090°
    N d. A distance to Saybrook Breakwater Light of not less than 1.3 miles
15463: If you are making 10 knots, what is your ETA at York Spit Channel Buoys "19" and "20"? 

    N a. 0959
    N b. 1002
    Y c. 1006
    N d. 1011
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
15712: 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°11.1'N, LONG 72°41.2'W
    N b. LAT 41°11.3'N, LONG 72°41.3'W
    N c. LAT 41°11.4'N, LONG 72°41.0'W
    Y d. LAT 41°11.5'N, LONG 72°40.7'W
15859: You are turning for 9 knots on course 230°T. At 0023,
Horton Point Light bears 208°pgc. At 0053, Horton Point Light bears 126°pgc. What is the position of your 0053 running fix? 

    N a. LAT 41°05.7'N, LONG 72°27.6'W
    N b. LAT 41°05.8'N, LONG 72°28.1'W
    N c. LAT 41°05.9'N, LONG 72°27.4'W
    Y d. LAT 41°06.0'N, LONG 72°28.2'W
15865: From your 0200 position, you change course to 272°pgc. How far north of Stratford Shoal Middle Ground Light does this track pass? 

    Y a. 2.1 miles
    N b. 1.6 miles
    N c. 1.3 miles
    N d. 1.0 miles
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.
16113: After you enter Thimble Shoal Channel, you will alter course to pass between Trestle "A" and "B". Which channel should you use? 

    N a. Thimble Shoal Main Channel or the South Auxiliary Channel
    N b. Any of the channels but keep to the right hand side
    Y c. The South Auxiliary Channel
    N d. Thimble Shoal Main Channel
16213: At 0715 you take the following bearings:

Race Rock Light 328°pgc
Little Gull Island Light 249°pgc
Mt. Prospect Antenna 036°pgc

Based on your 0715 fix, which statement is TRUE? 

    Y a. You are to the left of your track line.
    N b. Your fathometer reads about 265 fathoms.
    N c. You are in a cable area.
    N d. You are governed by the Inland Rules.
16239: From your 2045 position, you set a course to pass 1.5 miles due east of the charted position of Hog Island Lighted Bell Buoy "12". The known set and drift in the area are 068°T at 3 knots. What is the course to steer, with no change in engine speed, to make good your desired course? 

    Y a. 200°T
    N b. 203°T
    N c. 206°T
    N d. 209°T
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)
16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14? 

    Y a. 194°psc
    N b. 190°psc
    N c. 187°psc
    N d. 180°psc
16608: At 2142, you take the following bearings:

Stratford Point Light 331°T
Stratford Shoal Middle Ground Light 280°T
Old Field Point Light 223°T

What is your 2142 position? 

    Y a. LAT 41°03.0'N, LONG 73°01.7'W
    N b. LAT 41°03.1'N, LONG 73°02.1'W
    N c. LAT 41°03.1'N, LONG 73°01.3'W
    N d. LAT 41°03.3'N, LONG 73°01.9'W