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.

228: Your height of eye is 25 feet (7.6 meters). If the visibility is 5.5 nautical miles, what is the luminous range of Wolf Trap Light?
272: At 0925, you plot the following bearings:

Falkner Island Light bearing 251°true
Kelsey Point BW Light bearing 075°true

If you correct for a current setting 215°T at 0.5 knot, what course will you steer from the 0925 position to arrive at a position 0.5 mile south of Long Sand Shoal West End Horn Buoy "W"?
298: You have just passed York River Entrance Channel Lighted Buoys "13" and "14". The chart shows a light approximately 1.0 mile off your port beam with a light characteristic "Fl 6 sec". What is the name of this light?
394: A vessel at LAT 38°03.0'S, LONG 49°38.0'W, heads for a destination at LAT 41°26.0'S, LONG 38°32.0'W. Determine the true course by Mercator sailing. 

    Y a. 111.5°T
    N b. 113.5°T
    N c. 158.5°T
    N d. 160.5°T
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
450: If you want to put into Point Judith Harbor of Refuge, what chart should you use? 

    Y a. 13219
    N b. 13217
    N c. 13209
    N d. 13205
530: You observe the planet Jupiter at a sextant altitude (hs) of 66°27.6' on 26 May . The index error is 5.2' on the arc. The height of eye is 52 feet. What is the observed altitude (Ho)? 

    N a. 65°39.5'
    N b. 65°32.8'
    N c. 66°27.2'
    Y d. 66°15.0'
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
825: On 15 August , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1130 ZT. Your DR position is LAT 26°24.0'S, LONG 155°02.0'E, and your sextant altitude (hs) is 48°45.9'. The index error is 2.6' on the arc, and your height of eye is 51.5 feet. The chronometer time of the observation is 01h 27m 38s, and the chronometer error is 02m 14s slow. Find the latitude at meridian transit from the ex-meridian observation. 

    N a. LAT 26°32.6'S
    Y b. LAT 26°51.6'S
    N c. LAT 26°57.0'S
    N d. LAT 27°09.9'S
831: On 30 March , in DR position LAT 20°26.2'N, LONG 131°17.9'E, you take an ex-meridian observation of the Moon's lower limb at upper transit. The chronometer time of the sight is 10h 36m 02s, and the chronometer error is 02m 06s slow. The sextant altitude (hs) is 48°21.4'. The index error is 2.0' on the arc, and your height of eye is 40 feet. What is the latitude at meridian transit? 

    N a. LAT 20°44.8'N
    Y b. LAT 20°31.9'N
    N c. LAT 20Z°23.7'N
    N d. LAT 20°15.6'N
989: On 2 April , your 0830 zone time fix gives you a position of LAT 20°16.0'S, LONG 004°12.0'E. Your vessel is steaming a course of 143°T at a speed of 18.0 knots. An observation of the Sun's upper limb is made at 0903 zone time, and the observed altitude (Ho) is 42°39.6'. The chronometer reads 09h 05m 40s, and the chronometer error is 02m 15s fast. Local apparent noon occurs at 1145 zone time,
and a meridian altitude of the Sun's lower limb is made.
The observed altitude (Ho) for this sight is 63°46.2'.
Determine the vessel's 1200 zone time position. 

    N a. LAT 21°10.1'S, LONG 004°53.9'E
    N b. LAT 21°14.0'S, LONG 004°55.0'E
    Y c. LAT 21°18.0'S, LONG 005°00.5'E
    N d. LAT 22°42.0'S, LONG 004°57.0'E
1089: At 1830 zone time, on 6 April , your DR position is LAT 26°33.0'N, LONG 64°31.0'W. You are steering course 082°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1900 running fix. NP-0019

    N a. LAT 26°20.1'N, LONG 64°19.4'W
    N b. LAT 26°23.7'N, LONG 64°29.3'W
    N c. LAT 26°28.4'N, LONG 64°32.1'W
    Y d. LAT 26°32.5'N, LONG 64°27.1'W
1284: On 10 November , your 1630 zone time DR position is LAT 25°10.0'N, LONG 71°12.0'W. You are on course 335°T at a speed of 24 knots. What will be the zone time of sunset at your vessel? 

    N a. 1650
    Y b. 1700
    N c. 1715
    N d. 1730
1475: On 26 February , your vessel's 1615 ZT DR position is LAT 25°14'S, LONG 57°22'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 8h 13m 19s, and the Sun is bearing 266.0° per standard magnetic compass. The chronometer error is 01m 46s slow, and the variation in the area is 6°E. What is the deviation of the standard compass? 

    Y a. 1.7°E
    N b. 3.4°W
    N c. 7.7°E
    N d. 13.7°E
1683: You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PPE" repeated several times followed by a short dash (0.4 sec), 60 dots (0.1 sec each) and another short dash. At the beginning of the last dash, the comparing watch reads 07h 30m 08s. When compared to the chronometer, the comparing watch reads 07h 31m 48s, and the chronometer reads 07h 32m 16s. What is the chronometer error? 

    N a. 0m 28s slow
    N b. 1m 40s slow
    N c. 0m 08s fast
    Y d. 0m 36s fast
1756: You pass Hole in Wall Light at 1200, 24 May. What is your ETA off the Mhoon Landing Gage if you average 6.5 mph? 

    N a. 0152, 26 May
    N b. 0426, 26 May
    N c. 1128, 26 May
    Y d. 1221, 26 May
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
1801: What is the distance from the Amoco Docks at Baton Rouge, LA, to the new mouth of the White River? 

    N a. 981.5 miles
    N b. 953.5 miles
    Y c. 345.3 miles
    N d. 700.2 miles
1802: You are turning for 10 mph and passing Hog Point ,LA. Angola reports that the current at Red River Landing is 4.5 mph. Which statement is TRUE? 

    N a. The main channel lies on the north side of the island you see ahead.
    N b. You are making 14.5 mph over the ground.
    N c. You would expect to find the more favorable current near the broken red line in the river.
    Y d. You should expect to encounter vessels crossing the river at mile 300.5 AHP.
1838: What is the distance from Baton Rouge, LA, to St. Louis, MO, on the Mississippi River System? 

    N a. 1038 miles
    Y b. 916 miles
    N c. 690 miles
    N d. 352 miles
1949: The circle with black and white quadrants located at mile 435.6 AHP is a __________. 

    N a. Daymark
    N b. Electrical Tower
    Y c. River Gage
    N d. Information Board
2030: Which of the following statements regarding buoys on the Mississippi River is TRUE? 

    Y a. Buoys should be given as wide a berth as possible in passing.
    N b. Buoy positions on the chart are exact.
    N c. The buoys are maintained on station year round.
    N d. The buoys do not shift positions due to permanent moorings.
2180: On 12 April , at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What are the intercept (a) and azimuth (Zn) from the assumed position of this sight? 

    N a. Zn 057.7°,  a 15.4' T
    Y b. Zn 057.0°,  a 17.7' A
    N c. Zn 122.3°,  a 17.7' A
    N d. Zn 123.0°,  a 22.7' A
2247: At 1845 zone time, on 17 March , while taking stars for an evening fix, you observe an unidentified star bearing 200°T at an observed altitude of 53°45.0'. Your DR position at the time of the sight is LAT 25°10.0'N, LONG 66°48.0'W. The chronometer time of the sight is 10h 47m 49s, and the chronometer error is 1m 54s fast. Your vessel is steaming on a course of 290°T at a speed of 18.0 knots. What star did you observe? 

    N a. Altair
    N b. Mirfak
    N c. Pollux
    Y d. Rigel
2294: You are passing Eastwood Lt. (mile 849.3 AHP) and the map indicates that Bunge Grain facility would be located at the square with number __________. 

    N a. 4
    N b. 6
    N c. 8
    Y d. 10
2324: At 1547 ZT, on 22 May , in DR position LAT 45° 12.8' N, LONG 028° 15.4' W, the Moon’s upper limb is observed on the visible horizon, bearing 120.0° psc. Variation is 2° W. What is the deviation? 

    N a. 1.4°W
    Y b. 2.6°E
    N c. 1.4°E
    N d. 2.6°W
2340: You have steamed 775 miles at 17 knots, and consumed 145 tons of fuel. If you have to steam 977 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 18 knots? 

    Y a. 204 tons
    N b. 181 tons
    N c. 163 tons
    N d. 129 tons
2457: You have steamed 369 miles at 16 knots and burning 326 barrels of fuel per day. You must decrease your consumption to 212 barrels per day with 271 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel? 

    N a. 11.1
    N b. 12.9
    N c. 13.6
    Y d. 15.1
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
3303: You have steamed 174 miles and consumed 18.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 416 miles? 

    N a. 34.9 tons
    N b. 38.4 tons
    Y c. 43.0 tons
    N d. 46.2 tons
3461: You wish to make good a course of 053°T while turning for an engine speed of 16 knots. The set is 345°T, and the drift is 2.4 knots. What speed will you make good along the track line? 

    N a. 14.1 knots
    N b. 15.2 knots
    N c. 16.1 knots
    Y d. 16.8 knots
4003: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 058°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324° 

    Y a. 1.5°W
    N b. 1.0°W
    N c. 1.0°E
    N d. 0.5°W
4004: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 166°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324° 

    N a. 2.0°W
    Y b. 1.5°W
    N c. 1.0°W
    N d. 0.5°W
6844: At 1010 your vessel passes close abeam to Buoy "NCB" in the inbound traffic lane. At this time the Chesapeake Bay Pilot informs you that he will not board your vessel until 1100. The pilot boat is located 1.5 miles northeast of Cape Henry Light. What should you reduce your speed to in order to arrive at the pilot boat at this time? 

    N a. 5.9 knots
    N b. 7.5 knots
    Y c. 8.2 knots
    N d. 9.8 knots
11705: Your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course to steer per standard magnetic compass to arrive at LAT 36°59.0'N, LONG 75°48.5'W, if the current is 043°T at 1.3 knots, a south-southeasterly wind is causing 3° of leeway, and you are turning for 8.7 knots? 

    N a. 260.5°psc
    N b. 264.0°psc
    Y c. 268.0°psc
    N d. 271.5°psc
11806: What course should you steer by standard magnetic compass between Mattituck Inlet and Branford Reef Light, if the set and drift of the current are 027° at 2.5 knots, and a northeasterly wind will cause 1° of leeway? Your engines are turning for 12 knots. 

    N a. 295°psc
    N b. 305°psc
    N c. 317°psc
    Y d. 320°psc
12301: You are on course 055° per standard magnetic compass when you sight Block Island Southeast Point Light in line with the Block Island Aero Beacon bearing 319° per standard magnetic compass. Based on this you __________. 

    N a. should use 4°W deviation on true courses of 040°
    N b. know the compass error is 19°W
    Y c. know the deviation table is correct for that heading
    N d. should apply 4°W deviation to all bearings
12708: You are on course 302° per standard magnetic compass when you take the following bearings: Little Gull Island Light 283°psc Race Rock Light 311°psc Latimer Reef Light 027°psc What is your position? 

    N a. LAT 41°12.2'N, LONG 71°57.6'W
    N b. LAT 41°12.4'N, LONG 71°57.4'W
    N c. LAT 41°12.4'N, LONG 71°57.9'W
    Y d. LAT 41°12.6'N, LONG 71°57.6'W
13902: A vessel enroute to Long Island Sound from sea will enter waters governed by the Inland Rules of the Road __________. 

    N a. when crossing the Territorial Sea boundary
    N b. between Montauk Point and Block Island
    N c. when north of latitude 41°10.0'N
    Y d. when passing through The Race
14501: You are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville Reservoir stands at 65 feet above MSL. If the highest point on your vessel is 54 feet above the water, what will be the vertical clearance as you pass under the overhead power cables at mile 186.2? 

    N a. 94 feet
    N b. 101 feet
    Y c. 108 feet
    N d. 117 feet
15118: What was the speed made good from 1845 to 1930? 

    N a. 6.2 knots
    N b. 7.5 knots
    Y c. 8.3 knots
    N d. 9.4 knots
15468: Which loran line of position will serve as a danger reading on the loran to keep you west of the submerged obstruction at LAT 37°24.2'N, LONG 76°03.7'W, after you leave York Spit Channel? 

    N a. Not less than 9960-Z-58622
    N b. Not more than 9960-Y-41595
    N c. Not less than 9960-Y-41595
    Y d. Not less than 9960-X-27246
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
15813: According to the DR track line from your 0100 position, how far off Roanoke Point Shoal Buoy "5" should you be when the buoy is abeam? 

    N a. 0.2 mile
    Y b. 0.6 mile
    N c. 1.3 mile
    N d. 1.8 miles
15830: The black broken-line marking, across the river, that appears at mile 952.1 AHP represents a __________. 

    Y a. utility crossing
    N b. railroad
    N c. submarine crossing
    N d. revetment
15840: You should expect to pass how far off buoy "12"? 

    Y a. 0.8 mile
    N b. 1.2 miles
    N c. 1.7 miles
    N d. 2.1 miles
16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T? 

    N a. 0601
    Y b. 0609
    N c. 0620
    N d. 0624
16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T? 

    N a. 0601
    Y b. 0609
    N c. 0620
    N d. 0624
16038: At 0820 Old Field Point Light bears 206° per gyrocompass,
and Stratford Shoals Middle Ground Light bears 322° per gyrocompass. The radar range to Middle Ground Light is 1.5 miles. Your 0820 fix gives you a position of __________. 

    N a. LAT 41°02.6'N, LONG 73°05.2'W
    Y b. LAT 41°02.5'N, LONG 73°04.9'W
    N c. LAT 41°02.3'N, LONG 73°05.2'W
    N d. LAT 41°02.0'N, LONG 73°05.1'W
16146: From your 2054 position, you change course to 066°T. Maintaining course and speed of 18 knots, at what time can you expect to first cross the 90-foot curve if you experience no set and drift? 

    Y a. 2105
    N b. 2111
    N c. 2117
    N d. 2125
16717: At 0705, you take the following bearings:
Watch Hill Light 030.5°pgc
Latimer Reef Light 329.0°pgc
Race Rock Light 262.0°pgc

What was the true course made good between 0645 and 0705? 

    N a. 252°T
    Y b. 256°T
    N c. 263°T
    N d. 266°T
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