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.


215: As an option to heading into Long Island Sound, you consider anchoring in the vicinity of the Gardiners Point Ruins at the north end of Gardiners Island. What is the minimum recommended distance from the ruins for fishing, trawling, or anchoring?


444: At 1110, you increase speed to 12 knots. What is your ETA at the new position?


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


534: You depart LAT 52°01'N, LONG 176°09'E, for LAT 52°01'N, LONG 178°46'W. What are the course and distance by parallel sailing?

    N a. 090°T, 95 miles
    Y b. 090°T, 188 miles
    N c. 270°T, 95 miles
    N d. 270°T, 188 miles

548: 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.
    N b. Above the Thames River Bridge
    Y c. In the Race
    N d. You will not be governed by the Rules.

563: At 0705, the gyro loses power. At 0715, you are on course 092° per standard magnetic compass (psc) when you take the following bearings: Falkner Light bears 356°psc, Horton Point Light bears 123°psc, and Kelsey Point Breakwater Light bears 048°psc. What is the position of your 0715 fix?

    N a. LAT 41°06.7'N, LONG 72°36.0'W
    Y b. LAT 41°07.0'N, LONG 72°36.2'W
    N c. LAT 41°07.2'N, LONG 72°36.4'W
    N d. LAT 41°07.4'N, LONG 72°36.4'W

564: Horton Point Light __________.

    N a. is 14 feet above sea level
    N b. has a fixed green light
    Y c. is shown from a white square tower
    N d. is synchronized with a radio beacon

581: At 1119, Wolf Trap Light bears 268°T at 4.4 miles by radar. What were the set and drift since your 1037 fix?

    Y a. 358°, 0.7 knot
    N b. 358°, 0.5 knot
    N c. 178°, 0.7 knot
    N d. 178°, 0.5 knot

641: At 1032 on 24 June, you pass Carolina Landing Light(508.8 AHP). What has been the average current since 2350, 23 June, if you have been making turns for 9.0 mph?

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

741: On 16 February , your 1845 ZT DR position is LAT 25°50.5'N, LONG 46°24.0'W. At that time you observe Polaris with a sextant altitude (hs) of 26°25.5'. The chronometer time of the sight is 09h 47m 30s and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 55.0 feet. What is your latitude by Polaris?

    Y a. 25°38.0'N
    N b. 25°44.2'N
    N c. 26°00.1'N
    N d. 26°37.5'N

748: On 7 May , you observe Polaris for latitude at 0303 ZT. Your DR position is LAT 56°35.4'N, LONG 05°38.9'W. The sextant altitude is 56°11.1'. The height of eye is 36', and the index error is 3.3' off the arc. What is the latitude at the time of the sight?

    N a. 56°24.6'N
    N b. 56°32.6'N
    N c. 56°35.0'N
    Y d. 56°38.7'N

993: Your 0745 ZT, 15 July , position is LAT 29°04.0'N, LONG 71°17.5'W. You are on course 165°T, and your speed is 8.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix? NP-0003

    Y a. LAT 28°35.0'N, LONG 71°08.5'W
    N b. LAT 28°39.8'N, LONG 71°04.0'W
    N c. LAT 28°40.5'N, LONG 71°13.0'W
    N d. LAT 28°43.3'N, LONG 71°02.5'W

999: On 16 February , your 0640 zone time (ZT) position was LAT 23°46.0'N, LONG 156°24.0'W. Your vessel was steaming on course 222°T at a speed of 18.0 knots. An observation of the Sun's lower limb was made at 0910 ZT. The chronometer read 07h 08m 06s and was slow 01m 56s. The observed altitude (Ho) was 27°15.8'. LAN occurred at 1245 ZT (ZD +10). The observed altitude (Ho) was 55°25.3'. What was the longitude of your 1245 ZT running fix?

    N a. 157°37.2'W
    Y b. 157°42.0'W
    N c. 157°45.7'W
    N d. 157°47.2'W

1002: On 13 November , your 1030 ZT DR position is LAT 19°03'S, LONG 6°34'E. You are on course 164°T, speed 12 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1112 351°55.4' S 18°00.4' 88°08.0'
1121 354°10.4' S 18°00.5' 88°33.9'

    Y a. LAT 19°22.3'S, LONG 6°37.8'E
    N b. LAT 19°20.1'S, LONG 6°41.4'E
    N c. LAT 19°17.6'S, LONG 6°39.2'E
    N d. LAT 19°15.8'S, LONG 6°36.8'E

1010: On 8 February , your 0800 zone time position is LAT 21°55'S, LONG 52°27'W. Your vessel is on course 056°T at a speed of 17.5 knots. An observation of the Sun's lower limb is made at 0938 zone time, and the observed altitude (Ho) is 46°06.5'. The chronometer reads 12h 37m 23s, and the chronometer error is 1m 24s slow. LAN occurs at 1243 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 83°56.1'. Determine the vessel's 1200 zone time position.

    N a. LAT 20°57.0'S, LONG 51°21.5'W
    N b. LAT 20°58.0'S, LONG 51°25.5'W
    N c. LAT 21°04.0'S, LONG 51°12.0'W
    Y d. LAT 21°04.0'S, LONG 51°21.5'W

1127: 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

1138: After you get underway, what is the first river gage you will pass?

    Y a. Donaldsonville
    N b. Head of Passes
    N c. Baton Rouge
    N d. Red River Landing

1190: On 12 February , your 0930 zone time DR position is LAT 25°20.0'N, LONG 30°40.0'W. Your vessel is on course 135°
T at a speed of 11.2 knots. What is the zone time of local apparent noon (LAN)?

    N a. 1210
    Y b. 1215
    N c. 1220
    N d. 1224

1249: What is the white/black within a circle symbol found at mile 592.1 AHP?

    N a. Terrence Landing Light
    N b. Daymark
    Y c. River Gage
    N d. Information Board

1452: On 6 November , your 0752 zone time DR position is LAT 25°11.0'N, LONG 76°07.0'W. At that time, you observe the Sun bearing 119°psc. The chronometer reads 12h 53m 07s, and the chronometer error is 01m 19s fast. The variation is 3°W. What is the deviation of the standard magnetic compass?

    N a. 2.2°W
    N b. 3.8°W
    N c. 2.8°E
    Y d. 3.2°E

1456: On 12 September , your 0736 zone time DR position is LAT 28°34.0'S, LONG 174°49.0'E. At that time, you observe the Sun bearing 084° per standard magnetic compass (psc). The chronometer reads 07h 38m 11s, and the chronometer error is 01m 46s fast. The variation is 11°W. What is the deviation of the standard magnetic compass?

    N a. 2.9°W
    Y b. 3.2°E
    N c. 3.9°E
    N d. 4.7°W

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

1642: From your 2129 position you reduce engine speed to 14 knots. What is the course to make good from your 2129 position to arrive 0.3 mile north of Lighted Whistle Buoy "NCA" (LL#375) assuming no set and drift?

    N a. 216°T
    N b. 219°T
    Y c. 222°T
    N d. 225°T

2051: On which map would you find Redman Point, Arkansas?

    N a. 23
    Y b. 20
    N c. 17
    N d. 5

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

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

2698: While on a course of 138°T, a light bears 14° on the starboard bow at a distance of 8.6 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard?

    Y a. 132°T
    N b. 135°T
    N c. 138°T
    N d. 141°T

2902: You are steaming on a course of 058°T at 11.5 knots. At 0209 you observe a lighthouse bearing 129°T. At 0252 the lighthouse bears 173°T. What is your distance off at the second bearing?

    N a. 9.4 miles
    N b. 10.7 miles
    Y c. 11.2 miles
    N d. 12.8 miles

3285: While steaming at 19.4 knots, your vessel consumes 392 barrels of fuel oil per day. In order to reduce consumption to 182 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?

    N a. 13.2 knots
    Y b. 15.0 knots
    N c. 17.4 knots
    N d. 18.2 knots

3287: While steaming at 16.5 knots, your vessel consumes 349 barrels of fuel oil per day. In order to reduce consumption to 189 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?

    N a. 12.1 knots
    Y b. 13.5 knots
    N c. 14.6 knots
    N d. 15.4 knots

3307: You have steamed 182 miles and consumed 16.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 392 miles?

    N a. 28.3 tons
    Y b. 34.5 tons
    N c. 49.6 tons
    N d. 74.2 tons

3604: You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?
DEVIATION TABLE
MAGNETIC HDG DEVIATION
285° 5°E
270° 3°E
255° 1°E
240° 1°W

    N a. 242°psc
    N b. 271°psc
    Y c. 278°psc
    N d. 288°psc

3613: You are steering a magnetic compass course of 075°. The variation for the area is 10°W, and the compass deviation is 5°E. What is the true course you are steering?

    N a. 060°T
    Y b. 070°T
    N c. 080°T
    N d. 090°T

11504: At 1016 your position is LAT 41°07.6'N, LONG 71°38.5'W. At 1116 your position is LAT 41°01.4'N, LONG 71°29.4'W. What was the course made good between the two positions?

    Y a. 132°T
    N b. 135°T
    N c. 140°T
    N d. 143°T

12304: You are on course 302° per standard magnetic compass when you sight Block Island Southeast Point Light in line with the Block Island Aero Beacon bearing 323° per standard magnetic compass. Based on this you __________.

    Y a. know the deviation table is correct for that heading
    N b. know the deviation is 15°E
    N c. should swing your vessel to check the deviation table
    N d. know the deviation is equal to the variation

12601: You are on course 062° per standard magnetic compass when you take the following bearings: Branford Reef Light 060°psc Stratford Point Light 272°psc New Haven Light 324°psc What is your position?

    N a. LAT 41°07.1'N, LONG 72°53.4'W
    Y b. LAT 41°10.5'N, LONG 72°52.8'W
    N c. LAT 41°11.6'N, LONG 72°50.0'W
    N d. LAT 41°13.3'N, LONG 72°48.7'W

12902: Your 1312 position is LAT 37°10.9'N, LONG 75°29.6'W. You are turning for 8.3 knots. What is your ETA at LAT 37°21.9'N, LONG 75°42.6'W?

    N a. 1449
    N b. 1456
    Y c. 1502
    N d. 1511

14517: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.)

    N a. 2239
    N b. 2255
    N c. 2315
    Y d. 2344

15023: At 1042, on 16 March, you are passing the Vicksburg Gage (mile 437.0 AHP). What has been the average current since 0630, 15 March, if you have been making turns for 8.0 mph?

    N a. 0.2 mph
    N b. 0.5 mph
    Y c. 0.8 mph
    N d. 1.2 mph

15339: If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?

    N a. 1719
    Y b. 1724
    N c. 1729
    N d. 1734

15343: At 1844 Watch Hill Point bears 323° true and Block Island North Light bears 084° true

Which statement is TRUE?

    N a. Your fathometer reads 97 feet
    N b. You are governed by the Inland Rules of the Road.
    N c. You are to the left (north) of your desired course line.
    Y d. Your vessel is approximately 8.7 miles off Sandy Point.

15362: The south shore of Long Island Sound near your position is __________.

    N a. marked by gradual shoaling
    N b. low and marshy
    N c. backed by marshes and wooded uplands
    Y d. bluff and rocky

15366: At 0615 you change course to 078°T. If there is no current, when will Falkner Island Light be abeam?

    N a. 0750
    N b. 0743
    N c. 0735
    Y d. 0730

15514: From your 1850 fix, you come left to a course of 280°T,
while maintaining a speed of 10 knots. Which of the following combinations of available Loran-C lines would give the best cross for position determining?

    Y a. 9960-Y and 9960-W
    N b. 9960-X and 9960-Y
    N c. 9960-W and 9960-X
    N d. All are equally good.

15539: At 2127 you are on course 076°T. What is your ETA at a position where Twenty Eight Foot Shoal Lighted Bell Buoy "TE" is abeam to port?

    N a. 2316
    N b. 2324
    Y c. 2332
    N d. 2345

15606: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water under the keel is about __________.

    Y a. 38 feet (11.5 meters)
    N b. 45 feet (13.6 meters)
    N c. 52 feet (15.8 meters)
    N d. 59 feet (17.3 meters)

15716: At 1210, you are in position LAT 41°14.3'N, LONG 72°16.5'W. What is the depth of water below your keel?

    Y a. 97 feet (29.4 meters)
    N b. 108 feet (32.7 meters)
    N c. 119 feet (36.1 meters)
    N d. 125 feet (37.9 meters)

15807: You are southeast of Saybrook Breakwater Light passing Saybrook Bar Lighted Bell Buoy "8". This buoy marks __________.

    Y a. shoal water
    N b. a tide rips area
    N c. the junction with the Connecticut River
    N d. a sunken wreck

15942: At 1959 Watch Hill Point Light bears 030°T, Montauk Point Light bears 146°T, and Little Gull Light bears 283°T. What is the approximate fathometer reading?

    Y a. 51 feet
    N b. 73 feet
    N c. 95 feet
    N d. 111 feet

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

16138: At 1930 Race Rock Light bears 111°T, and Little Gull Island Light bears 172°T. Which of the following is your position at 1930?

    N a. LAT 41°15.6'N, LONG 72°09.6'W
    N b. LAT 41°16.1'N, LONG 72°08.3'W
    N c. LAT 41°15.3'N, LONG 72°12.9'W
    Y d. LAT 41°15.8'N, LONG 72°07.1'W

16318: What true course and speed did you make good between 0730 and 0900?

    N a. 273°T, 8.7 knots
    Y b. 277°T, 8.4 knots
    N c. 279°T, 8.0 knots
    N d. 284°T, 7.5 knots

16359: If your engines are turning for 6.5 knots and the estimated current is north at 0.5 knot. What is the ETA at point "A"?

    Y a. 0511
    N b. 0501
    N c. 0450
    N d. 0440

16706: At 0520, you take the following observations:

Point Judith Light 032°pgc
Point Judith Harbor of Refuge
Main Breakwater Center Light 308°pgc

What is the position of your 0520 fix?

    N a. LAT 41°20.8'N, Long 71°30.3'W
    Y b. LAT 41°20.8'N, Long 71°29.7'W
    N c. LAT 41°20.6'N, Long 71°30.0'W
    N d. LAT 41°20.5'N, Long 71°29.8'W