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.

62: The Greenville Gage reads 10.6 feet. The high point of your towboat is 54 feet above water. What is the vertical clearance as you pass under the Greenville Highway Bridge?
67: The Gage at Red River Landing reads 22.2 feet. The LWRP for Red River is 10.6 feet. What is the water level in relation to the low water reference plane?
71: The Natchez Gage reads 20.6 feet. The high point on your towboat is 47 feet above the water. What is the vertical clearance as you pass under the Natchez Highway Bridge?
76: What daymark should you see as you approach Parker Landing Light (mile 924.6 AHP)? 

    N a. Green square
    Y b. Green diamond
    N c. Red and green rectangle
    N d. Green triangle
112: 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.
189: At 0645, Watch Hill Point (left tangent) bears 316.5°pgc at 2.75 miles. What was the speed made good between 0600 and 0645? 

    N a. 8.1 knots
    N b. 9.8 knots
    Y c. 10.3 knots
    N d. 11.4 knots
303: A vessel steams 576 miles on course 260°T from LAT 40°36'N, LONG 50°24'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing? 

    N a. LAT 39°12'N, LONG 62°28'W
    N b. LAT 39°06'N, LONG 62°34'W
    N c. LAT 39°02'N, LONG 62°37'W
    Y d. LAT 38°56'N, LONG 62°42'W
312: A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing? 

    N a. 283.1°T, 381.2 miles
    Y b. 284.3°T, 384.6 miles
    N c. 285.6°T, 385.0 miles
    N d. 286.8°T, 387.4 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
510: You observe the star Deneb at a sextant altitude (hs) of 48°34.8' on 16 December . The index error is 4.0' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)? 

    N a. 48°02.9'
    Y b. 48°30.5'
    N c. 48°31.4'
    N d. 48°46.5'
640: Which of the following statements concerning the buoys on the Mississippi River is TRUE? 

    N a. The position of river buoys can be determined by consulting the latest Light List - Vol. V.
    N b. A preferred channel mark is a lateral mark indicating a channel junction which must always be passed to starboard.
    Y c. Setting a buoy is the act of placing a buoy on assigned position in the water.
    N d. None of the above.
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
982: On 15 August , your 0512 zone time position was LAT 29°18.0'N, LONG 57°24.0'W. Your vessel was steaming on course 262°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0824 ZT. The chronometer read 00h 22m 24s and was slow 01m 34s. The observed altitude (Ho) was 38°16.7'. LAN occurred at 1204 zone time.
The observed altitude (Ho) was 74°58.0'. What was the longitude of your 1204 zone time running fix? 

    N a. LONG 59°52.0'W
    N b. LONG 59°54.0'W
    Y c. LONG 59°58.5'W
    N d. LONG 60°02.0'W
1140: At 0921, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 10.0 mph, what was the current since departure? 

    N a. 3.4 mph
    N b. 2.0 mph
    Y c. 1.7 mph
    N d. 1.4 mph
1302: From Baton Rouge to Cairo, what is the maintained minimum channel depth during low water? 

    Y a. 9 feet
    N b. 12 feet
    N c. 15 feet
    N d. 30 feet
1495: On 9 September , your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading? 

    N a. 0°
    N b. 1°W
    N c. 3°W
    Y d. 2°E
1671: On 9 May , your vessel's 1809 ZT DR position is LAT 48°13.7'N, LONG 168°36.3'E, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 283.7° per standard magnetic compass. Variation in the area is 13.0°E. The chronometer reads 07h 13m 19s and is 02m 56s fast. What is the deviation of the standard compass? 

    Y a. 0.1°W
    N b. 1.1°W
    N c. 1.1°E
    N d. 1.9°W
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
1733: What are the dimensions of the channel maintained at Baton Rouge, LA? 

    N a. 30 feet x 300 feet
    N b. 40 feet x 300 feet
    Y c. 45 feet x 500 feet
    N d. 30 feet x 500 feet
1810: You are turning for 9 mph, approaching Fort Adams Lt. (mile 311.4 AHP) and it is reported that the current at Knox Landing is estimated at 4.5 MPH. Which of the following statements is TRUE? 

    Y a. Tows and other vessels should navigate as close to the left descending bank as safety will permit.
    N b. The inflow channel is a navigable channel for any vessel.
    N c. You are making 13.5 mph over the ground.
    N d. Old River Control Structure Light and Fort Adams Light may be used as range lights when entering the outflow channel.
1867: On 12 June , your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 162°T at a sextant altitude (hs) of 28°36.5'. The index error is 0.5'
on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe? 

    N a. Gamma Virginis
    Y b. Iota Centauri
    N c. Spica
    N d. Mimosa
1891: On 22 July , your 1759 DR position is LAT 24°50.2'S, LONG 005°16.0'E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe? 

    N a. Regulus
    N b. Antares
    Y c. Miaplacidus
    N d. Suhail
2126: 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
2592: What chart would you need to enter Port Jefferson Harbor? 

    Y a. 12362
    N b. 12364
    N c. 12369
    N d. 12370
2673: At 2221 your course is 222°pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355° relative, at a range of 5.8 miles. The gyro error is 2°E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port? 

    N a. 206°pgc
    N b. 210°pgc
    Y c. 228°pgc
    N d. 231°pgc
2685: You are steering 031°T, and a light is picked up dead ahead at a distance of 12.7 miles at 0017. You change course to pass the light 3.5 miles off abeam to starboard. If you are making 11 knots, what is your ETA at the position 3.5 miles off the light? 

    N a. 0118
    N b. 0121
    Y c. 0124
    N d. 0127
2689: You are steering 107°T, and a light is picked up dead ahead at a distance of 11 miles at 0847. You change course to leave the light 3 miles off to starboard. If you are making 15.5 knots, what is your ETA at the position 3 miles off the light? 

    Y a. 0928
    N b. 0931
    N c. 0934
    N d. 0937
2712: What is the length of the trip? 

    N a. 720.8 miles
    N b. 777.4 miles
    Y c. 897.2 miles
    N d. 906.3 miles
2862: Your are on course 317°T at 13 knots. A light is bearing 22.5° relative at 0640. At 0659 the same light is bearing 45° relative. At what time should the light be abeam? 

    N a. 0709
    Y b. 0712
    N c. 0718
    N d. 0721
2865: You are steering a course of 240°T, and a lighthouse bears 025° on the starboard bow at 2116. At 2144 the same lighthouse bears 050° on the starboard bow, and you have run 6 miles since the first bearing. What is the ETA when the lighthouse is abeam? 

    N a. 2156
    N b. 2159
    Y c. 2202
    N d. 2205
2870: Your vessel is on a course of 126°T at 17 knots. At 0251 a light bears 099.5°T, and at 0313 the light bears 081°T. At what time and at what distance off will your vessel be when abeam of the light? 

    N a. 0327, 4.4 miles
    Y b. 0335, 6.2 miles
    N c. 0345, 6.8 miles
    N d. 0351, 7.4 miles
3111: You are turning 100 RPM, with propeller pitch of 25 feet, and an estimated negative slip of 5%. What is the speed of advance? 

    N a. 23.4 knots
    N b. 24.7 knots
    Y c. 25.9 knots
    N d. 26.3 knots
3266: Your vessel has consumed 1087 bbls of fuel after steaming 2210 miles at a speed of 10.75 kts. What is the maximum speed you can steam for the last 1000 miles of the voyage on the remaining 725 bbls, if you estimate 3% of the fuel is not usable? 

    N a. 11.43 knots
    N b. 11.76 knots
    Y c. 12.84 knots
    N d. 15.33 knots
3626: Your vessel is steering course 284°psc, variation for the area is 6°W, and deviation is 3°E. The wind is from the north-northeast, producing a 3° leeway. What true course are you making good? 

    N a. 275°T
    Y b. 278°T
    N c. 284°T
    N d. 290°T
3646: The true course between two points is 041°. Your gyrocompass has an error of 1°W. You make an allowance of 2° leeway for a east-southeast wind. What gyro course should be steered to make the true course good? 

    N a. 040°pgc
    N b. 042°pgc
    N c. 043°pgc
    Y d. 044°pgc
10503: At 0817 your GPS indicates a position of LAT 37°01.6'N, LONG 75°31.7'W. You are on course 182° per standard magnetic compass at a speed of 9.2 knots. At 0913 your GPS indicates your position at LAT 36°52.3'N, LONG 75°30.8'W. What were the set and drift? 

    N a. 121°T at 0.8 knot
    N b. 139°T at 1.1 knots
    Y c. 219°T at 1.1 knots
    N d. 298°T at 0.7 knot
10508: At 0919 your position is LAT 37°00.0'N, LONG 75°30.0'W. You are on course 270°T at 8.7 knots. At 1000 your position is LAT 37°00.5'N, LONG 75°37.0'W. What was the set and drift? 

    N a. 010° at 0.5 knot
    N b. 017° at 1.0 knot
    N c. 020° at 0.4 knot
    Y d. 032° at 0.9 knot
11406: At 2021 your position is LAT 41°09.7'N, LONG 72°59.8'W. At 2057 your position is LAT 41°00.5'N, LONG 72°49.5'W. What are your true course and speed made good? 

    Y a. 140° at 20 knots
    N b. 145° at 18 knots
    N c. 316° at 19 knots
    N d. 320° at 17 knots
11907: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 130° at 1.2 knots, and a southerly wind causes 3° of leeway? 

    N a. 112°T
    Y b. 108°T
    N c. 105°T
    N d. 102°T
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
15064: At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102°T. If the height of the tide is +1.0 foot, what is the approximate depth of the water under the keel? 

    N a. 14 ft (4.2 meters)
    Y b. 19 ft (5.8 meters)
    N c. 22 ft (6.7 meters)
    N d. 29 ft (8.8 meters)
15345: You are making good a course of 060°T at a speed of 13.5 knots. At 1855 Block Island North Light bears 086°T; at 1910 Block Island North Light bears 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position? 

    Y a. You are on the edge of a cable area.
    N b. The bottom is mud, sand, and clay.
    N c. The wavy magenta lines to the north through east of your position are designated lobstering areas.
    N d. You are inside the 120 fathom curve
15413: From your 1915 fix you come right and steer a course of 200°T. At 2000, your position is LAT 37°05.5'N, LONG 76°07.0'W. Your intention is to pass through Chesapeake Channel. If there are no set and drift, what course would you steer per standard magnetic compass to make good a course of 145°T? 

    N a. 134°
    N b. 139°
    N c. 151°
    Y d. 156°
15462: Visibility has decreased to 1 mile in haze. At 0948, you take the following radar ranges. What course should you steer per gyrocompass from this fix to enter the channel between buoys "19" and "20"?

Thimble Shoal Light - 5.9 miles
South end of trestle C of the Chesapeake Bay Bridge
and Tunnel - 3.8 miles
South end of trestle B of the Chesapeake Bay Bridge
and Tunnel - 5.4 miles 

    N a. 001°pgc
    N b. 004°pgc
    N c. 007°pgc
    Y d. 010°pgc
15507: What course should you steer by your standard magnetic compass to make good a course of 280°T? 

    N a. 266°psc
    N b. 272°psc
    N c. 290°psc
    Y d. 294°psc
15619: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck? 

    N a. 4.3 miles
    N b. 3.4 miles
    N c. 2.6 miles
    Y d. 1.7 miles
15799: At 0845, you are on a course of 097°T, and Townshend Ledge Buoy "10A" is close abeam to port. With a westerly current of 1.2 knots, what speed will you have to turn for from your 0845 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030? 

    N a. 8.5 knots
    N b. 9.7 knots
    Y c. 10.9 knots
    N d. 12.1 knots
15811: At 0100, you obtain the following bearings:

Rocky Point Lookout Tower 062°T
Horton Point Lighthouse 189°T

What was the speed made good between 0045 and 0100? 

    Y a. 7.4 knots
    N b. 8.0 knots
    N c. 8.7 knots
    N d. 9.2 knots
15865: From your 0200 position, you change course to 272°pgc. How far north of Stratford Shoal Middle Ground Light does this track pass? 

    Y a. 2.1 miles
    N b. 1.6 miles
    N c. 1.3 miles
    N d. 1.0 miles
16119: At 0812, you obtain the following radar information:

Cape Henry Light bearing 287° pgc @ 3.85 nm

What is your 0812 position? 

    N a. LAT 36°53.7'N, LONG 75°56.0'W
    N b. LAT 36°53.8'N, LONG 75°56.1'W
    N c. LAT 36°54.5'N, LONG 75°56.2'W
    Y d. LAT 36°54.6'N, LONG 75°55.8'W
16461: At 0400, you obtain the following information:

Sand Shoal Inlet South Light bearing 303° true @ 7.1nm

What is your 0400 position? 

    N a. LAT 37°14.2'N, LONG 75°40.7'W
    N b. LAT 37°14.1'N, LONG 75°41.3'W
    N c. LAT 37°14.1'N, LONG 75°40.5'W
    Y d. LAT 37°14.0'N, LONG 75°40.7'W
16616: At 0130, your position is LAT 41°09.3'N, LONG 72°46.9'W when you change course to 086°T. If you make good 086°T,
what is the closest point of approach to Twenty-Eight Foot Shoal Lighted Buoy? 

    N a. 0.7 mile
    Y b. 0.9 mile
    N c. 1.1 miles
    N d. 1.2 miles
16640: At 0445 you take the following lines of position:

Montauk Point Light 292°pgc
Block Island Southeast Point Light 024°pgc

What was the current encountered since your 0400 fix? 

    N a. 004°, 0.7 knot
    Y b. 004°, 0.9 knot
    N c. 184°, 0.7 knot
    N d. 184°, 0.9 knot