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.


43: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks?


51: As you approach Anconia Pt. Light (mile 528.6 AHP), which type of dayboard would you see on the light structure?


86: As you approach Shreves cut-off you see Red River Landing Gage (mile 302.4 AHP) which reads 6.2 feet. Which of the following statements is TRUE?


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?

    N a. 8.5 mph
    N b. 5.7 mph
    N c. 1.5 mph
    Y d. 0.5 mph

185: At 1950, your position is LAT 37°12.3'N, LONG 75°38.6'W. The set and drift from 1930 to 1950 were __________.

    Y a. 150°T at 1.6 knot
    N b. 150°T at 0.6 knots
    N c. 330°T at 0.6 knot
    N d. 330°T at 1.6 knots

216: NOAA VHF-FM weather broadcasts from New London, CT are on __________.

    Y a. 162.55 MHz
    N b. 162.40 MHz
    N c. 162.30 MHz
    N d. 162.25 MHz

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?

    N a. 17.0 miles
    N b. 16.0 miles
    N c. 12.0 miles
    Y d. 7.5 miles

266: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. What loran reading will ensure that you will remain clear of the 18' shoal located 1 mile NW of Falkner Island Light?

    Y a. 9960 Y: not less than 44014
    N b. 9960 X: not more than 26452
    N c. 9960 W: not less than 14942
    N d. None of the above

278: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?

    Y a. 162.55 MHz
    N b. 162.85 MHz
    N c. 181.15 MHz
    N d. 202.35 MHz

366: At 0731, approximately how much water is under your keel?

    N a. 26 feet (7.9 meters)
    Y b. 31 feet (9.4 meters)
    N c. 48 feet (14.5 meters)
    N d. 54 feet (16.4 meters)

571: At 0845, you are approaching the entrances to Thimble Shoal Channel. What channel must you use?

    N a. The South Auxiliary Channel or Thimble Shoal Channel, but you must remain on the right hand side of the channel.
    Y b. The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters) and you are not a passenger vessel.
    N c. The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12".
    N d. You are not permitted to use any of the channels, but must remain outside the buoyed channel line.

593: What is the length of the trip?

    N a. 1195.4 miles
    N b. 1223.1 miles
    Y c. 1520.1 miles
    N d. 1657.8 miles

621: You are on a voyage from New York, NY, to San Francisco, CA. The distance from pilot to pilot is 5132 miles. The speed of advance is 13.5 knots. You estimate 32 hours for bunkering at Colon, and 14 hours for the Panama Canal transit. If you take departure at 0600 hours (ZD +4), 16 May, what is your ETA (ZD +7) at San Francisco?

    N a. 0609, 1 June
    Y b. 2109, 2 June
    N c. 0009, 3 June
    N d. 0409, 3 June

622: You are on a voyage from Limoy, Costa Rica, to Los Angeles, CA. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate 24.0 hours for bunkering at Colon, and 12.0 hours for the Panama Canal transit. If you take departure at 1836 hours (ZD +6), 28 January, what is your ETA (ZD +8) at Los Angeles?

    N a. 1736, 9 February
    N b. 1736, 8 February
    Y c. 1336, 8 February
    N d. 0536, 8 February

630: You are on a voyage from Corpus Christi, TX, to Fort de France, Martinique. The distance from pilot to pilot is 2190 miles (2521 statute miles). The speed of advance is 15.0 knots. You estimate a layover in Charlotte Amalie, Virgin Islands, of 16.0 hours. If you take departure at 0654 (ZD +6), 27 November, what is your ETA (ZD +4) at Fort de France?

    N a. 2054, 3 December
    N b. 2254, 3 December
    Y c. 0254, 4 December
    N d. 2054, 4 December

633: The Linwood Bend revetment on the LMR extends from mile __________.

    N a. 828.1-823.1 RDB
    N b. 831.7-829.4 RDB
    Y c. 841.3-838.7 LDB
    N d. 845.4-842.5 LDB

1107: On 16 April , your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.

    N a. LAT 17°54.9'S, LONG 167°48.7'E
    N b. LAT 17°55.6'S, LONG 167°45.1'E
    N c. LAT 17°56.8'S, LONG 167°52.4'E
    Y d. LAT 18°00.4'S, LONG 167°49.2'E

1133: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?

    N a. 53.0 feet
    N b. 62.6 feet
    N c. 64.2 feet
    Y d. 68.0 feet

1164: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?

    N a. Privately maintained buoys at a yacht club
    N b. Government buoys marking the Hurricane Point dikes
    Y c. Barges moored at the Dennis Landing Terminal
    N d. A pipeline discharging dredge spoil

1183: On 25 June , your 0900 zone time DR position is LAT 24°10.0'S, LONG 148°30.0'W. Your vessel is on a course of 230°T at a speed of 18.0 knots. What is the zone time of local apparent noon (LAN)?

    N a. 1154
    N b. 1156
    Y c. 1200
    N d. 1204

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

1208: On 12 July , your 0800 ZT DR position is LAT 24°15.0'N, LONG 132°30.0'W. Your vessel is on course 045°T at a speed of 15.0 knots. What is the ZT of local apparent noon (LAN)?

    N a. 1146
    N b. 1148
    Y c. 1152
    N d. 1159

1242: The solid lines extending into the channel at mile 948 AHP are __________.

    Y a. dikes
    N b. revetments
    N c. spoil areas
    N d. Westvaco Service Facilities

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

1297: At 0645, on the 17th of April, you pass Hole in the Wall Lt. (mile 373.4 AHP). What has been your average speed since departing the Exxon Refinery?

    N a. 8.8 mph
    N b. 7.3 mph
    N c. 6.8 mph
    Y d. 6.3 mph

1344: At 2142, on January 3, you pass Sebastapol Light (mile 283.3 AHP). At 0137, January 4, you pass Fort Adams Light(mile 311.4 AHP). You have been turning for 9.0 mph. What was the current?

    N a. 4.2 mph
    N b. 3.3 mph
    N c. 2.7 mph
    Y d. 1.8 mph

1344: At 2142, on January 3, you pass Sebastapol Light (mile 283.3 AHP). At 0137, January 4, you pass Fort Adams Light(mile 311.4 AHP). You have been turning for 9.0 mph. What was the current?

    N a. 4.2 mph
    N b. 3.3 mph
    N c. 2.7 mph
    Y d. 1.8 mph

1803: As you approach Shreves cut-off you see Red River Landing Gage (mile 302.4 AHP) which reads 4.2 feet. The Low Water Reference Plane (LWRP) is 10.6 feet. Which of the following statements is TRUE?

    N a. This reading is 6.4 feet above the Low Water Reference Plane.
    N b. A vessel drawing 8 ft would be able to pass over the sill at Old River Lock
    Y c. This reading is 6.4 feet below the Low Water Reference Plane.
    N d. A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River.

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

1897: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 249°T at an observed altitude (Ho) of 52°50.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?

    N a. Peacock
    N b. Schedar
    N c. Ankaa
    Y d. Altair

1909: On 22 March , your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 294°T at an observed altitude (Ho) of 33°02.7'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?

    N a. Regulus
    Y b. Menkar
    N c. Rigel
    N d. Alphard

1955: At 1814, on 11 September, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day?

    Y a. 8.7 mph
    N b. 7.7 mph
    N c. 6.3 mph
    N d. 5.6 mph

2009: On 16 July , your 1920 ZT DR position is LAT 25°36.0'N, LONG 172°18.9'W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?

    N a. Rasalhague, Spica, Arcturus
    Y b. Venus, Antares, Vega
    N c. Vega, Mars, Antares
    N d. Saturn, Acrux, Spica

2321: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?

    N a. Privately maintained buoys at a yacht club
    N b. Government buoys marking the Hurricane Point dikes
    Y c. Barges moored at the Dennis Landing Terminal
    N d. A pipeline discharging dredge spoil

2655: You are steering 078°T, and a light is picked up dead ahead at a distance of 15.6 miles at 2316. You change course to pass the light 4.5 miles off abeam to port. If you are making 17 knots, what is your ETA at the position 4.5 miles off the light?

    N a. 0006
    Y b. 0009
    N c. 0012
    N d. 0015

2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?

    N a. 035°pgc
    Y b. 043°pgc
    N c. 051°pgc
    N d. 059°pgc

2690: While on a course of 066°pgc, a light bears 13° on the port bow at a distance of 12.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to port?

    N a. 067°pgc
    Y b. 072°pgc
    N c. 079°pgc
    N d. 085°pgc

3620: Your vessel is steering course 197°psc, variation for the area is 7°E, and deviation is 4°W. The wind is from the west, producing a 2° leeway. Which true course are you making good?

    N a. 192°T
    N b. 196°T
    Y c. 198°T
    N d. 202°T

3648: The true course between two points is 312°. Your gyrocompass has an error of 3°W. You make an allowance of 4° leeway for a west by south wind. What gyro course should be steered to make the true course good?

    N a. 305°pgc
    Y b. 311°pgc
    N c. 315°pgc
    N d. 318°pgc

10105: What is the course psc from Chesapeake Light to North Chesapeake Entrance Buoy NCA?

    N a. 313°psc
    N b. 317°psc
    Y c. 321°psc
    N d. 325°psc

11905: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive one mile due south of Block Island Southeast Point Light, if you are turning for 8.6 knots, the current is 130° at 1.2 knots, and a northerly wind causes 3° of leeway?

    Y a. 061°T
    N b. 064°T
    N c. 067°T
    N d. 070°T

13309: What type of bottom can be expected at the northern end of York Spit Channel?

    N a. Hard clay
    N b. Fine gray sand
    N c. Soft black mud
    Y d. Mud and sand

13908: Montauk Point Light is 168 feet above what reference level?

    N a. Mean low water
    N b. Mean tide level
    N c. Ground level
    Y d. Mean high water

14401: You are underway and steaming in an easterly direction on the Columbia River. Your vessel is positioned in the middle half of Cape Horn Channel and is abeam of Cape Horn Light. What should your fathometer read at this position, if the staff gauge at Portland reads 0 feet?

    N a. 16 feet
    N b. 18 feet
    Y c. 22 feet
    N d. 24 feet

15265: Orient Point Light is __________.

    N a. lighted only during daytime when the sound signal is in operation
    N b. maintained only from May 1 to Oct 1
    N c. 64 feet (19.4 meters) above mean low water
    Y d. lighted throughout 24 hours

15320: Inbound, the color of Cape Henry Light will __________.

    Y a. change before you reach Chesapeake Channel Lighted Bell Buoy "2C"
    N b. change after you reach Chesapeake Channel Lighted Bell Buoy "2C"
    N c. remain the same
    N d. alternate regardless of your position

15963: At 1845, you obtain the following Radar Ranges:

Old Plantation Flats Light @ 7.45nm
New Point Comfort Light @ 7.35nm

Your latitude is __________.

    N a. 37°11.4'N
    Y b. 37°11.2'N
    N c. 37°10.9'N
    N d. 37°10.7'N

16010: The characteristic of Branford Reef Light is __________.

    N a. flashing red every 4 seconds
    N b. flashing red every 3 seconds
    Y c. flashing white every 6 seconds
    N d. flashing yellow every 4 seconds

16258: What is the course to steer per standard magnetic compass from the anchorage to point A, if easterly winds are causing 3° of leeway?

    N a. 187°
    Y b. 191°
    N c. 194°
    N d. 197°

16316: At 0900, the current is flooding in a direction of 350°T at 1.2 knots. If your engines are turning RPMs for 9 knots, which course should you steer per standard magnetic compass to make good a course of 297° true?

    Y a. 302°psc
    N b. 311°psc
    N c. 317°psc
    N d. 319°psc

16411: 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?

    N a. 074°pgc
    N b. 076°pgc
    N c. 078°pgc
    Y d. 080°pgc

16460: At 0250, Great Machipongo Inlet Light "5" (37°21.8'N,
75°43.7'W) bears 279°pgc. At 0320, the light bears 320°
pgc. If you are making good 6.5 knots, what is the position of your 0320 running fix?

    N a. LAT 37°17.95'N, LONG 75°39.95'W
    N b. LAT 37°18.00'N, LONG 75°39.75'W
    N c. LAT 37°18.10'N, LONG 75°39.30'W
    Y d. LAT 37°18.10'N, LONG 75°39.55'W

16540: You sight Bartlett Reef Light in range with New London Harbor Light bearing 038°pgc. At the time of the bearing,
the helmsman reports he was heading 253°pgc and 269° per standard magnetic compass. What is the deviation for that heading?

    Y a. 1°E
    N b. 1°W
    N c. 4°E
    N d. 4°W

16707: Point Judith Harbor of Refuge __________.

    N a. is used mostly by towing vessels
    N b. has a maximum depth of 14 feet at MHW
    N c. is easily accessible in heavy southerly seas
    Y d. is entered through the East Gap or the West Gap

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

16719: You are bound for New London. Where will you cross the demarcation line and be governed by the Inland Rules of the Road?

    N a. You are already governed by the Inland Rules.
    Y b. In the Race
    N c. Above the Thames River Bridge
    N d. You will not be governed by the Inland Rules.