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.

55: After you get underway, what is the first river gage you will pass?
80: The Helena Gage reads 9.4 feet. The high point on your towboat is 46 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
230: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck?
234: Which structure should you look for while trying to locate Southwest Ledge Light? 

    Y a. White octagonal house on a cylindrical pier
    N b. White conical tower with a brown band midway of height
    N c. Conical tower, upper half white, lower half brown
    N d. Black skeleton tower on a granite dwelling
249: At 0005, on 26 January, your position is LAT 41°11.8'N, LONG 72°20.5'W. From this position, you plot a course to steer to Mattituck Breakwater Light "MI" with an engine speed of 9.0 knots. If there are no set and drift, what course should you steer? 

    N a. 225.0°psc
    N b. 230.5°psc
    Y c. 233.0°psc
    N d. 236.0°psc
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
396: A vessel at LAT 10°22.0'S, LONG 7°18.0'E, heads for a destination at LAT 6°52.0'N, LONG 57°23.0'W. Determine the true course and distance by Mercator sailing. 

    N a. 285°T, 3825.3 miles
    Y b. 285°T, 4025.7 miles
    N c. 296°T, 3825.3 miles
    N d. 296°T, 4025.7 miles
423: At 0530, your position is LAT 41°12.6'N, LONG 72°08.5'W. What is the color of New London Harbor Light? 

    N a. Green
    N b. White
    Y c. Red
    N d. Alternating white and green
480: The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. The position of the vertex is LAT 37°34.9'N, LONG 25°59.0'W. Determine the latitude intersecting the great circle track 600 miles west of the vertex, along the great circle track. 

    Y a. 36°54.9'N
    N b. 36°50.2'N
    N c. 36°45.9'N
    N d. 36°36.8'N
555: Your 0507 position is about 7 miles from Bridgeport, CT. What is the distance from this position to Newport, RI? 

    N a. 114 miles
    N b. 101 miles
    N c. 95 miles
    Y d. 88 miles
670: You are on a voyage from Cape May (LAT 39°50'N, LONG 74°45'W) to the English Channel (LAT 49°00'N, LONG 05°00'W). What will NOT prohibit the use of a great circle track from departure to arrival? (Use gnomonic chart WOXZC5274.) 

    N a. Newfoundland
    N b. Icebergs north of 48°N and west of 49°W
    N c. Islands approximately 50 miles south of Cape Cod
    Y d. The high latitude in which the vertex lies
809: On 7 November , your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°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 calculated latitude at LAN? 

    N a. 27°52.3'N
    N b. 27°53.4'N
    N c. 27°55.1'N
    Y d. 27°57.2'N
823: On 15 October , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1146 ZT. Your DR position is LAT 22°42.0'N, LONG 139°52.0'E, and your sextant altitude (hs) is 58°30.4'. The index error is 3.4' on the arc, and your height of eye is 56.7 feet. The chronometer time of the observation is 02h 45m 06s, and the chronometer error is 01m 06s slow. Find the latitude at meridian transit from the ex-meridian observation. 

    N a. LAT 22°29.1'N
    Y b. LAT 22°35.2'N
    N c. LAT 22°58.1'N
    N d. LAT 23°20.6'N
998: On 23 May , your 0628 zone time position was LAT 28°18.0'S, LONG 102°42.0'E. Your vessel was steaming on course 040°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0758 ZT. The chronometer read 01h 02m 06s and was fast 04m 04s. The observed altitude (Ho) was 13°16.7'. LAN occurred at 1201 zone time. The observed altitude (Ho) was 42°32.0'. What was the longitude of your 1201 zone time running fix? 

    N a. 103°57.9'E
    N b. 104°00.4'E
    Y c. 104°03.5'E
    N d. 104°06.3'E
1003: On 15 November , your 1030 ZT DR position is LAT 17°25'S, LONG 42°12'W. You are on course 059°T, speed 22 knots. Determine your 1200 position using the following observations of the Sun.

ZONE TIME GHA DECLINATION Ho
1128 40°50.4' S 18°33.6' 88°18.4'
1133 42°05.4' S 18°33.6' 88°37.7' 

    N a. LAT 17°00.0'S, LONG 41°45.8'W
    N b. LAT 17°02.1'S, LONG 41°48.4'W
    Y c. LAT 17°06.8'S, LONG 41°44.3'W
    N d. LAT 17°08.9'S, LONG 41°40.4'W
1098: On 19 September , your 0300 zone time DR position is LAT 24°35'N, LONG 88°40'W. You are on course 288°T at a speed of 14 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0028

    N a. LAT 24°47.4'N, LONG 89°15.0'W
    Y b. LAT 24°52.5'N, LONG 89°22.4'W
    N c. LAT 24°59.5'N, LONG 89°28.6'W
    N d. LAT 25°06.0'N, LONG 90°37.0'W
1195: On 23 June , your 0900 zone time DR position is LAT 21°26.0'N, LONG 137°46.0'W. Your vessel is on course 059°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1159
    N b. 1205
    Y c. 1210
    N d. 1214
1206: Your 0900 DR position is LAT 23°16'N, LONG 146°12'E. Your vessel is on a course of 286°T, at a speed of 14.5 knots. Determine the zone time of LAN on 14 March . 

    N a. 1151
    N b. 1209
    N c. 1223
    Y d. 1228
1244: If your vessel is making turns for 7.5 mph with an estimated average current of 1.5 mph, what is your ETA at the dock in Angelina, LA? 

    Y a. 1621, 28 Dec
    N b. 2203, 28 Dec
    N c. 0516, 29 Dec
    N d. 1621, 29 Dec
1257: On 5 May , your 1300 ZT DR position is LAT 25°16.0'S, LONG 12°30.0'W. You are on course 012°T at a speed of 14 knots. What will be the zone time of sunset at your vessel? 

    N a. 1702
    Y b. 1719
    N c. 1730
    N d. 1741
1276: Your 0000 zone time position on 13 June is LAT 24°35'N, LONG 142°26'E. Your vessel is on course 245°T, speed is 13.5 knots. What is the zone time of sunrise? 

    N a. 0440
    Y b. 0445
    N c. 0503
    N d. 0528
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
1465: On 22 April , your 0344 zone time DR position is LAT 21°16.0'N, LONG 107°32.0'W. At that time, you observe Spica bearing 236°psc. The chronometer reads 10h 45m 16s,
and the chronometer error is 00m 25s fast. The variation is 7.5°E. What is the deviation of the standard compass? 

    N a. 1.1°W
    Y b. 5.2°E
    N c. 5.2°W
    N d. 6.1°W
1502: On May 20 , you are keeping ZD +4, and your 2300 (ZD +4) DR position is LAT 42°07'N, LONG 81°02'W. At that time, you observe Polaris bearing 012°psc. The chronometer time of the observation is 03h 02m 23s, and the chronometer is 1m 17s fast. The variation is 9.5°W. What is the deviation of the magnetic compass? 

    Y a. 2.7°W
    N b. 12.2°W
    N c. 6.8°E
    N d. 12.2°E
1535: The Red River Landing Gage reads 5.2 feet. The low water reference plane (LWRP) for Red River is 10.6 feet. Which of the following statements is TRUE? 

    Y a. River level is below the Low Water Reference Plane.
    N b. The depth over revetment at Old River is 25.2 ft.
    N c. The depth over Old River Lock sill is greater than 11 ft.
    N d. This gage reading is at a higher elevation than the same reading on the Gage at Head of Passes.
1859: On 22 March , your 0519 ZT DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 094°T, at an observed altitude (Ho) of 30°15.0'. The chronometer reads 10h 16m 47s and is 02m 15s slow. What star did you observe? 

    N a. Acamar
    Y b. Enif
    N c. Menkar
    N d. Rigel
1956: At 1923, you increase speed to make good 9.2 mph. What is the first gage you will pass after your speed change? 

    N a. Cottonwood Point
    Y b. Caruthersville
    N c. Fulton
    N d. New Madrid
2680: While on course 321°pgc with a 1°W gyro error, you pick up a buoy on radar bearing 001° relative at 5.2 miles. What will be the course to pass the buoy by 1 mile abeam to starboard, if you change course when the buoy is 4.5 miles away? 

    N a. 305°T
    Y b. 310°pgc
    N c. 316°T
    N d. 336°pgc
2783: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)? 

    Y a. Green square
    N b. Green triangle
    N c. Green diamond
    N d. Red square
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
2901: You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing? 

    Y a. 14.8 miles
    N b. 15.3 miles
    N c. 15.8 miles
    N d. 16.3 miles
3105: You are turning 82 RPM, with a propeller pitch of 23 feet, and an estimated slip of +6%. What is the speed of advance? 

    Y a. 17.5 knots
    N b. 17.9 knots
    N c. 18.4 knots
    N d. 19.7 knots
3262: You have steamed 632 miles at 18.5 knots, and consumed 197 tons of fuel. If you have 278 tons of usable fuel remaining, how far can you steam at 15.0 knots? 

    N a. 681 miles
    N b. 892 miles
    N c. 1100 miles
    Y d. 1357 miles
3651: The true course between two points is 337°. Your gyrocompass has an error of 3°E and you make an allowance of 5° leeway for a west wind. Which gyro course should be steered to make the true course good? 

    Y a. 329°pgc
    N b. 335°pgc
    N c. 339°pgc
    N d. 345°pgc
3756: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 093°T, and the variation is 6°E. If the heading of your vessel at the time of the sighting is 097° per standard magnetic compass, what is the correct deviation? 

    N a. 5°E
    N b. 5°W
    N c. 10°E
    Y d. 10°W
3761: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°
T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation? 

    N a. 5°E
    N b. 5°W
    N c. 8°E
    Y d. 8°W
3761: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°
T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation? 

    N a. 5°E
    N b. 5°W
    N c. 8°E
    Y d. 8°W
12200: You are on course 119°psc. You sight New Haven Outer Channel Range Rear Light in line with the Outer Channel Range Front Light bearing 346° per standard magnetic compass. This indicates that __________. 

    N a. you should swing the vessel to determine the deviation
    Y b. the existing deviation table is correct for that heading
    N c. your compass is affected by a local magnetic disturbance
    N d. the compass error is 16°W
12604: You are on course 082° per standard magnetic compass (psc) when you take the following bearings: New London Ledge Light - 036.5°psc Little Gull Island Light - 157.0°psc Saybrook Break Water Light - 294.5°psc What is your position? 

    N a. LAT 41°02.3'N, LONG 72°04.5'W
    N b. LAT 41°09.5'N, LONG 72°07.1'W
    Y c. LAT 41°13.6'N, LONG 72°07.5'W
    N d. LAT 41°14.1'N, LONG 72°12.8'W
12608: You are on course 083° per standard magnetic compass when you take the following bearings: Branford Reef Light 344.5°psc Falkner Island Light 053.5°psc Mattituck Inlet Light 141.5°psc What is your position? 

    N a. LAT 41°10.4'N, LONG 72°43.0'W
    N b. LAT 41°09.6'N, LONG 72°44.9'W
    N c. LAT 41°08.4'N, LONG 72°43.7'W
    Y d. LAT 41°08.0'N, LONG 72°44.8'W
12706: You are on course 053° per standard magnetic compass when you take the following bearings: Little Gull Island Light 275°psc Race Rock Light 296°psc Latimer Reef Light 011°psc What is your position? 

    N a. LAT 41°12.9'N, LONG 71°56.3'W
    Y b. LAT 41°13.2'N, LONG 71°56.0'W
    N c. LAT 41°13.4'N, LONG 71°55.5'W
    N d. LAT 41°13.8'N, LONG 71°56.1'W
13401: You are planning to anchor in Orient Harbor at LAT 41°07.9'N, LONG 72°18.5'W. Assuming that normal conditions exist, how much anchor cable should you put out? 

    N a. 16 to  18 feet
    N b. 40 to  60 feet
    Y c. 80 to 112 feet
    N d. 120 to 140 feet
14404: You are underway and proceeding in an easterly direction on the Columbia River. You position your vessel in the middle of the channel and bring Government Island Lower Range in line over your bow. What should your fathometer read at this position, if the staff gauge at Portland reads 10.0 feet? 

    Y a. 15 feet
    N b. 24 feet
    N c. 28 feet
    N d. 31 feet
15017: At 2100, you alter course to 250°T and reduce speed to 7 knots. You enter the traffic separation scheme on the inbound side. At 2200, your fix shows you crossing a broken purple line on the chart, and you observe North Chesapeake Entrance Lighted Gong Buoy "NCD" to port. This area is __________. 

    Y a. a precautionary area centered on buoy "CBJ"
    N b. a pilotage area
    N c. an area with local magnetic disturbances
    N d. in inland waters
15029: What type of daymark will you see as you approach Gold Dust Bar Light (mile 793.3 AHP) ? 

    Y a. Red diamond
    N b. Red triangle
    N c. Green square
    N d. Green diamond
15411: From your 1830 fix, you continue south on a course of 150°T turning RPMs for 6 knots. You encounter a flood current in the direction of 330°T at 2 knots. Adjusting your course for set and drift, which course would you steer to make good a course of 150°T while turning RPMs for 6 knots? 

    N a. 144°T
    Y b. 150°T
    N c. 158°T
    N d. 162°T
15663: At 0748, you change course to 160°T. Which loran reading will insure you clear Great Eastern Rock? 

    Y a. Nothing more than 9960-W-14645
    N b. Nothing more than 9960-X-25970
    N c. Nothing more than 9960-Y-43850
    N d. Nothing more than 9960-Y-43960
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
15844: Your course made good from 2045 to 2111 is __________. 

    N a. 187°T
    N b. 190°T
    Y c. 193°T
    N d. 196°T
16017: What is the approximate distance to New Bedford, MA, from your 0530 DR position, if your 0352 position was 7 miles from Bridgeport, CT? 

    N a. 77 miles
    N b. 91 miles
    Y c. 104 miles
    N d. 115 miles
16560: From your 1800 position, you steer a course of 355°psc at a speed of 10.0 knots. At 1830, your position is LAT 41°11.7'N, LONG 71°45.8'W. What are the set and drift of the current? 

    Y a. 005°T, 1.0 knot
    N b. 005°T, 0.5 knots
    N c. 180°T, 0.5 knot
    N d. 208°T, 1.0 knots
16710: In clear weather, how far away will you sight Point Judith Light? (use charted range of 20 miles as nominal range) 

    N a. 9.2 nm
    N b. 10.6 nm
    N c. 12.3 nm
    Y d. 14.0 nm
16718: At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 100°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer? 

    N a. 250°pgc
    N b. 255°pgc
    Y c. 263°pgc
    N d. 267°pgc