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.


38: What are the color and shape of Anconia Pt. Light at mile 528.6 AHP?


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?


160: How far is it to the Hernando Desoto Bridge in Memphis, TN?


193: 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. 4.6 miles
    N c. 6.4 miles
    Y d. 8.3 miles

229: If you want a more detailed chart of the area at your 2115 DR position, which chart should you use?

    N a. 12222
    N b. 12225
    Y c. 12224
    N d. 12222

348: At 0430, you take the following radar ranges:

Stratford Point Light @ 5.25 nm
Middle Ground Light @ 4.55 nm

What is your 0430 position?

    N a. LAT 41°08.9'N, LONG 73°00.0'W
    N b. LAT 41°05.0'N, LONG 73°01.1'W
    Y c. LAT 41°05.8'N, LONG 73°00.8'W
    N d. LAT 41°06.5'N, LONG 73°01.4'W

354: The south shore of Long Island Sound from Horton Point to Orient Point is __________.

    Y a. bluff and rocky
    N b. low and marshy
    N c. marked by sandy beaches and wooded uplands
    N d. bound by gradual shoaling

392: A vessel at LAT 32°14.7'N, LONG 66°28.9'W, heads for a destination at LAT 36°58.7'N, LONG 75°42.2'W. Determine the true course by Mercator sailing.

    N a. 058.2°T
    N b. 235.2°T
    Y c. 301.8°T
    N d. 348.3°T

447: You are encountering heavy weather. What action should you take based on your 1430 fix?

    N a. Continue on the same course but increase speed.
    N b. Continue on the same course at the same speed.
    N c. Slow to 8.3 knots to compensate for the current.
    Y d. Alter course to the right, to pass well clear of Southwest Ledge

628: You are on a voyage from Valdez, AK, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15.0 knots. You estimate a layover in San Francisco, CA, of 36.0 hours. If you take departure at 0800 (ZD +10), 29 October, what is your ETA (ZD +5) at the Panama Canal?

    Y a. 1900, 13 November
    N b. 1400, 13 November
    N c. 1400, 14 November
    N d. 0900, 13 November

684: 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?

    N a. 9.7 mph
    Y b. 8.7 mph
    N c. 6.3 mph
    N d. 5.6 mph

1009: On 22 February , your 0800 zone time position is LAT 24°16'S, LONG 95°37'E. Your vessel is on course 126°T at a speed of 14 knots. An observation of the Sun's lower limb is made at 0945 zone time. The chronometer reads 03h 47m 22s, and the chronometer error is 02m 37s fast. The observed altitude (Ho) is 57°02.1'. LAN occurs at 1148 zone time, and a meridian altitude of the Sun's lower limb is made. The observed meridian altitude (Ho) is 75°22.3'.
Determine the vessel's 1200 zone time position.

    N a. LAT 24°49.3'S, LONG 96°24.0'E
    N b. LAT 24°49.3'S, LONG 96°27.2'E
    Y c. LAT 24°52.2'S, LONG 96°24.0'E
    N d. LAT 24°52.2'S, LONG 96°27.2'E

1291: As you pass Solitude Lt. (mile 249.0 AHP) which dayboard would you see?

    Y a. Green diamond
    N b. Green square
    N c. Red triangle
    N d. Red diamond

1453: On 15 October , your 0325 zone time DR position is LAT 26°51.0'N, LONG 138°17.0'W. At that time, you observe Canopus bearing 167°pgc. The chronometer reads 00h 25m 36s, and the chronometer error is 00m 20s slow. The variation is 2°E. What is the gyro error?

    Y a. 1.3°W
    N b. 3.2°W
    N c. 3.2°E
    N d. 4.1°W

1480: On 28 November , your vessel's 0712 zone time DR position is LAT 26°54'S, LONG 45°18'W, when you take an azimuth of the Sun. Determine the gyro error using the azimuth information.
Chronometer time: 10h 09m 18s Chronometer error: slow 02m 54s Gyro bearing: 102°

    N a. 1.7°W
    Y b. 0.6°W
    N c. 1.1°E
    N d. 0.8°E

1542: 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

1687: What are the light characteristics of Greenwood Light (mile 288.6 AHP).

    N a. Fixed red light
    N b. 1 red flash every 4 seconds
    Y c. 2 red flashes every 5 seconds
    N d. 2 white flashes every 4 seconds

1744: At 1727, on 24 August, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 9 mph?

    N a. 1.8 mph
    Y b. 2.3 mph
    N c. 2.8 mph
    N d. 3.6 mph

2052: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?

    Y a. 53.2 feet
    N b. 58.1 feet
    N c. 68.2 feet
    N d. 96.3 feet

2207: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 8.9 ft. If the highest point on your vessel is 54 ft. above the water, what is your vertical clearance?

    Y a. 63.1 feet
    N b. 65.3 feet
    N c. 67.2 feet
    N d. 122.0 feet

2297: The Platte River empties into which river?

    N a. Mississippi
    N b. Ohio
    Y c. Missouri
    N d. Tennessee

2896: You are steaming on a course of 133°T at 16 knots. At 2216 you observe a lighthouse bearing 086°T. At 2223 the lighthouse bears 054°T. What is your distance off at the second bearing?

    N a. 1.7 miles
    N b. 2.0 miles
    N c. 2.3 miles
    Y d. 2.6 miles

3281: While steaming at 15.7 knots, your vessel consumes 329 barrels of fuel oil per day. In order to reduce consumption to 267 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?

    N a. 12.7 knots
    N b. 13.5 knots
    Y c. 14.6 knots
    N d. 15.5 knots

3764: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 064°T, and the variation is 17°W. If the heading of your vessel at the time of the sighting is 094° per standard magnetic compass, what is the correct deviation?

    N a. 4°E
    N b. 4°W
    N c. 13°E
    Y d. 13°W

11403: At 2115 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 0015 your position is LAT 41°03.3'N, LONG 72°37.9'W. What was your true course made good?

    N a. 062°T
    N b. 076°T
    Y c. 245°T
    N d. 259°T

12901: Your 1152 position is LAT 37°23.9'N, LONG 76°05.5'W. You are turning for 10.3 knots. What is your ETA at Trestle C of the Chesapeake Bay Bridge and Tunnel if you follow York Spit Channel?

    Y a. 1404
    N b. 1349
    N c. 1342
    N d. 1339

13905: The Ruins (LAT 41°08.5'N, L0NG 72°08.8'W) is __________.

    N a. a classic example of 18th century military fortifications
    N b. in an area of unpredictable, treacherous currents
    N c. restricted to surface navigation due to fishery conservation projects nearby
    Y d. prohibited to the public

15059: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. Which of the following is true?

    N a. you should consult the sailing directions for pilotage requirements
    N b. you will pass 1.5 nm off Branford Reef Light
    Y c. your course will keep you clear of the 18' shoal
    N d. None of the above

15068: Long Sand Shoal __________.

    N a. shoals gradually on the north and south sides
    Y b. is hard and lumpy
    N c. shows breakers when northerly winds exceed 10 knots
    N d. has gray sand with scattered shells

15116: According to your track line, how far off New Point Comfort Spit Light "4" will you be when abeam of this light?

    Y a. 0.9 mile
    N b. 1.2 miles
    N c. 1.5 miles
    N d. 1.8 miles

15261: You make good 097°T from your 0830 fix. With a westerly current of 1.2 knots, what engine speed will you have to turn for from your 0830 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030?

    N a. 9.7 knots
    Y b. 10.5 knots
    N c. 10.9 knots
    N d. 12.1 knots

15319: The coastline by Cape Henry is best described as __________.

    N a. rocky with pine scrubs
    Y b. sandy hills about eighty feet high
    N c. low wetlands
    N d. low and thinly wooded with many beach houses

15346: At 1942 Point Judith bears 030°T and has a range of 3.6 miles and Sandy Point has a range of 5.3 miles. What was your speed made good from your 1850 position?

    N a. 12.5 knots
    Y b. 13.0 knots
    N c. 13.5 knots
    N d. 14.0 knots

15458: You are delayed in sailing due to engineering problems. You get underway at 0630. A Coast Guard radio broadcast advises that an aircraft carrier will transit the Elizabeth River enroute Norfolk Naval Shipyard and a safety zone is in effect. Further information on how far you must remain from the carrier found is in __________.

    N a. PUB 117
    N b. Light List
    Y c. Coast Pilot
    N d. Chart Number 1

15466: At 1015, you estimate you have 139 miles to complete the voyage. If you average 9.5 knots, you will complete the voyage in __________.

    N a. 14 hours 22 minutes
    N b. 14 hours 30 minutes
    Y c. 14 hours 38 minutes
    N d. 14 hours 44 minutes

15510: From your 1800 position you steer a course of 350°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?

    N a. 029°T, 0.7 knot
    Y b. 029°T, 1.4 knots
    N c. 209°T, 0.7 knot
    N d. 209°T, 1.4 knots

15567: Point Judith Harbor of Refuge __________.

    N a. is used mostly by towing vessels
    N b. has a maximum depth of 14 feet (4.3 meters) at MHW
    N c. West Gap has a controlling depth of 24 feet
    Y d. is entered through the East Gap or the West Gap

15613: Which statement concerning your 1920 position is TRUE?

    Y a. You are entering a restricted area.
    N b. You are governed by the Inland Rules of the Road.
    N c. You are within the Chesapeake Bay Entrance traffic separation scheme.
    N d. You can expect differences of as much as 6° from the normal magnetic variation of the area.

15706: At 0700, Stratford Shoal Middle Ground Light bears 137°
pgc. From your radar, you get a bearing of 007°pgc to the south tip of Stratford Point with a range of 4.5 miles. What is your 0700 position?

    N a. LAT 41°04.6'N, LONG 73°07.0'W
    N b. LAT 41°04.6'N, LONG 73°07.4'W
    Y c. LAT 41°04.7'N, LONG 73°07.2'W
    N d. LAT 41°04.8'N, LONG 73°07.0'W

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

15941: From your 1934 position, you change course to pass 2.0 miles due north of Block Island Sound South Entrance Obstruction Lighted "BIS" Buoy. If you adjust your course only (while maintaining an engine speed of 14 knots) for a set and drift of 230°T at 3.5 knots, what is your ETA and distance off when abeam of Shagwong Reef Lighted Bell Buoy "7SR"?

    N a. 2003, 4.2 miles
    N b. 2009, 4.2 miles
    N c. 2003, 3.7 miles
    Y d. 2009, 3.7 miles

15943: At 2038 Block Island North Light bears 065°T and Montauk Point Light bears 216°T

Which statement is TRUE?

    N a. Your speed made good between your 1959 fix and 2038 fix is 11.0 knots.
    N b. Your course made good between your 1959 fix and 2038 fix is 102°T.
    N c. At your 2038 fix, your vessel is governed by the Inland Rules of the Road.
    Y d. Block Island Sound South Entrance Obstruction Lighted "BIS"
    Buoy is located 3.6 miles off your starboard bow.


16114: As you pass through the Chesapeake Bay Bridge and Tunnel,
you sight Trestle "A" in line bearing 198°pgc. What is the gyro error?

    N a. 2°E
    N b. 0°E
    Y c. 2°W
    N d. 4°W

16140: Available information indicates that there is a set and drift in this area of 290°T at 2 knots. Allowing for this set and drift, what course must you steer to make good a true course of 150°, while maintaining an engine speed of 13 knots, from your 1930 position?

    N a. 141°T
    Y b. 145°T
    N c. 149°T
    N d. 153°T

16209: You calculate that the current will be ebbing at the Race at 0700. You should expect to be set in which general direction at the Race?

    N a. West
    N b. North
    N c. Northeast
    Y d. East

16211: 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?

    N a. 20.4 miles
    N b. 23.7 miles
    N c. 23.9 miles
    Y d. 24.4 miles

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.

16418: At 2100, you set course of 000°T, speed 10 knots from LAT 41°07.0'N, LONG 71°30.0'W. Visibility is 5.5 n.m. What is the earliest time you can expect to sight Point Judith Light? (Use charted range of 20 miles as nominal range.)

    N a. The light is visible at 2100.
    Y b. 2114
    N c. 2123
    N d. 2131

16561: From your 1830 fix, you come left to a course of 290°T.
Which statement concerning Watch Hill Light is TRUE?

    N a. The nominal range of its white light is 16 miles.
    Y b. It displays both red and white lights.
    N c. Its horn blasts every 15 seconds in fog.
    N d. Its geographic range is 18.5 miles at a 35-foot (10.7 meters) height of eye.

16614: Branford Reef is __________.

    Y a. completely submerged at all stages of the tide
    N b. a hard sand shoal
    N c. surrounded by rocks awash at low water spring tides
    N d. a small, low, sandy islet surrounded by shoal water

16743: At 0040 you are south of Lewis Point when you receive word that the distress is terminated. You alter course to head for The Race. At 0052 you take the following relative bearings because the starboard gyro repeater is inoperative. Your heading at each bearing was 285°pgc. What is your 0052 position?

Race Rock Light 002°
Watch Hill Light 034°
Block Island North Light 122°

    N a. LAT 41°08.8'N, LONG 71°41.4'W
    N b. LAT 41°09.0'N, LONG 71°42.3'W
    N c. LAT 41°09.0'N, LONG 71°41.1'W
    Y d. LAT 41°09.1'N, LONG 71°41.7'W