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.

76: What daymark should you see as you approach Parker Landing Light (mile 924.6 AHP)?
87: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?
93: Which light characteristics does Quaker Oats Light (mile 952.6) have?
172: If you steer 143°pgc from your 2015 position at an engine speed of 8.0 knots, at what time would you reach a point midway between buoys "11" and "12" (ignore set and drift)? 

    Y a. 2029
    N b. 2032
    N c. 2035
    N d. 2037
253: 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. 1.8 mile
    N b. 1.3 mile
    Y c. 0.8 mile
    N d. 0.2 miles
280: Your 1752 position places you __________. 

    N a. less than 0.5 mile eastward of York Spit Channel
    Y b. less than 0.5 mile westward of York Spit Channel
    N c. greater than 0.5 mile westward of York Spit Channel
    N d. greater than 0.5 mile eastward of York Spit Channel
484: You are on a great circle track departing from position LAT 25°50'N, LONG 77°00'W. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W. The distance along the great circle track from the vertex to a point (X) is 600 miles westward. Determine the position of point (X) on the great circle track. 

    N a. LAT 36°47.5'N, LONG 38°21.8'W
    N b. LAT 36°50.4'N, LONG 38°25.6'W
    Y c. LAT 36°55.6'N, LONG 38°30.0'W
    N d. LAT 37°02.3'N, LONG 38°34.4'W
495: At 0815, visibility is excellent and you can see Montauk Point. Montauk Point is __________. 

    N a. low and rocky with scattered small pine trees
    N b. a low lying wetland
    Y c. a high sandy bluff
    N d. a flat wooded plain
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.
666: You are on a voyage via position LAT 44°00'N, LONG 150°00'E to LAT 46°15'N, LONG 124°00'W. Using gnomonic chart WOXZC 5270, determine which statement is TRUE? 

    Y a. A composite sailing with a limiting latitude of 51°N will  clear the Aleutian Islands.
    N b. The northern hemisphere vertex is east of the arrival position.
    N c. The Aleutian Islands are not a navigational hazard on the direct great circle track.
    N d. The final course angle lies in the northeast quadrant.
680: On which voyage would a great circle track provide a significant savings in distance to steam, when compared to a rhumb line track? (Use gnomonic tracking chart WOXZC 5270.) 

    N a. Valdez, AK, to the Marquesas Islands (LAT 8°00'S, LONG 140°00'W)
    N b. San Francisco to Kodiak, AK
    N c. Christmas Island (LAT 2°00'N, LONG 157°30'W) to Singapore via LAT 3°00'N, LONG 126°00'E
    Y d. Guam (LAT 14°00'N, LONG 145°00'E) to Seattle via LAT 47°30'N, LONG 125°30'W
707: What is the width of the widest span of the Cairo Highway Bridge (Upper Mississippi River mile 1.3)? 

    N a. 503 feet
    N b. 625 feet
    Y c. 675 feet
    N d. 800 feet
815: On 13 October , your 0515 zone time fix gives you a position of LAT 26°53.0'N, LONG 90°05.0'W. Your vessel is on course 068°T, and your speed is 7.8 knots. Local apparent noon (LAN) occurs at 1145 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 54°51.5'. What is the latitude at 1200 ZT? 

    Y a. 27°13.3'N
    N b. 27°14.6'N
    N c. 27°15.7'N
    N d. 27°16.8'N
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
1185: On 31 January , your 0920 zone time DR position is LAT 24°16.0'S, LONG 151°33.0'E. Your vessel is on course 258°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)? 

    N a. 1202
    N b. 1207
    Y c. 1211
    N d. 1215
1216: It is 8 March and you are keeping zone time -3. You are on course 104°T, speed 21 knots. Your 0830 DR position is LAT 25°35.0'S, LONG 66°34.0'E. What is the time of the second estimate of LAN by ship's clocks? 

    Y a. 10h 41m 26s
    N b. 11h 15m 34s
    N c. 11h 17m 32s
    N d. 11h 36m 54s
1265: On 22 November , your 1400 ZT DR position is LAT 22°16.0'N, LONG 136°37.0'E. You are on course 038°T at a speed of 22 knots. What will be the zone time of sunset at your vessel? 

    Y a. 1705
    N b. 1710
    N c. 1714
    N d. 1718
1535: The Red River Landing Gage reads 5.2 feet. The low water reference plane (LWRP) for Red River is 10.6 feet. Which of the following statements is TRUE? 

    Y a. River level is below the Low Water Reference Plane.
    N b. The depth over revetment at Old River is 25.2 ft.
    N c. The depth over Old River Lock sill is greater than 11 ft.
    N d. This gage reading is at a higher elevation than the same reading on the Gage at Head of Passes.
1724: What is the mile point of the Natchez, MS Gage? 

    N a. 228.4 AHP
    N b. 265.4 AHP
    N c. 302.4 AHP
    Y d. 363.3 AHP
1735: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 3.6 feet. If the highest point on your vessel is 62 ft. above the water, what is your vertical clearance? 

    Y a. 60.4 feet
    N b. 63.6 feet
    N c. 67.2 feet
    N d. 122.0 feet
1750: In addition to the Army Corps. of Engineers maps, data on bridge clearances may be found in the __________. 

    N a. Army Corps. of Engineers Regulations
    Y b. Light List
    N c. Waterways Journal
    N d. Channel Report
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
2031: After passing Wilkinson Lt. (mile 310.0 AHP) you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________. 

    N a. stay in the deepest water
    N b. slow down due to dredging operations
    N c. keep as close to the right descending bank as safety permits
    Y d. keep as close to the left descending bank as safety permits
2101: On 2 January , your 1759 zone time DR position is LONG 45°17.6'W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 08h 57m 10s, and the chronometer error is 02m 16s slow. The index error is 3.5' on the arc, and the height of eye is 42.5 feet. What is your latitude by Polaris? 

    N a. 22°50.2'N
    Y b. 23°18.8N
    N c. 23°30.2N
    N d. 24°07.3'N
2101: On 2 January , your 1759 zone time DR position is LONG 45°17.6'W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 08h 57m 10s, and the chronometer error is 02m 16s slow. The index error is 3.5' on the arc, and the height of eye is 42.5 feet. What is your latitude by Polaris? 

    N a. 22°50.2'N
    Y b. 23°18.8N
    N c. 23°30.2N
    N d. 24°07.3'N
2115: The south coast of Long Island Sound between Mattituck Inlet and Port Jefferson is __________. 

    N a. composed of high rocky bluffs
    N b. a high, flat plateau with sheer cliffs
    Y c. fringed by rocky shoals
    N d. low and marshy with isolated beaches
2209: 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
2577: On 23 July, you take a time tick using the 0900 GMT Cape Town broadcast. You hear a repeating series of 59 dots followed by a dash. At the beginning of the fifth dash you start your stopwatch. The chronometer reads 08h 39m 16s at the time the stopwatch reads 01m 42s. The chronometer error at 0900 GMT, 22 July, was 22m 24s slow. What is the chronometer rate? 

    Y a. 00m 02s losing
    N b. 01m 02s gaining
    N c. 22m 24s losing
    N d. 22m 26s slow
2700: You are underway on course 163°T at a speed of 15.8 knots.
You sight a buoy bearing 161°T at a radar range of 5.5 miles at 1319. If you change course at 1325, what is the course to steer to leave the buoy abeam to starboard at 1.0 mile? 

    Y a. 145°T
    N b. 148°T
    N c. 151°T
    N d. 175°T
3654: You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 07h 59m 54s. When compared to the chronometer, the comparing watch reads 08h 00m 00s, and the chronometer reads 08h 00m 06s. What is the chronometer error? 

    N a. 0m 06s slow
    N b. 0m 06s fast
    N c. 0m 12s fast
    Y d. No error
3755: 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 186°T, and the variation is 11°W. If the heading of your vessel at the time of the sighting is 193° per standard magnetic compass, what is the correct deviation? 

    Y a. 4°E
    N b. 4°W
    N c. 7°E
    N d. 7°W
4007: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a gyro heading of 166°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320° 

    Y a. 1.0°W
    N b. 1.0°E
    N c. 0.5°W
    N d. 0.5°E
13100: Your position is LAT 41°15.2'N, LONG 71°50.1'W at 1347. You are turning for 6.9 knots. What is your ETA at Shagwong Reef Buoy "7SR"? 

    Y a. 1506
    N b. 1515
    N c. 1521
    N d. 1527
13104: At 0242 your position is LAT 41°16.8'N, LONG 71°39.9'W. You are turning for 9.3 knots. What is your ETA at the West Gap of Pt. Judith Harbor of Refuge? 

    N a. 0319
    N b. 0325
    N c. 0329
    Y d. 0336
13109: At 1113 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at light "1" at the mouth of the approaches to Lake Montauk if you make good 9.6 knots? 

    N a. 1310
    Y b. 1301
    N c. 1254
    N d. 1249
13403: Your vessel has become disabled and is dead in the water. Your GPS set fixes your position at LAT 41°12.1'N, LONG 72°43.5'W. You decide to anchor at this position. Which type of bottom should you expect? 

    N a. Soft clay and sand
    Y b. Soft mud and shell
    N c. Hard sand and rocks
    N d. Blue mud and gray sand
13909: The irregular black line around a charted light such as Race Rock Light indicates that it is __________. 

    N a. unwatched
    Y b. surrounded by riprap
    N c. a minor light
    N d. constructed on an artificial island
15063: At 0830, you want the latest weather forecasts for the Falkner Island area. On what frequency do you set your FM radio for this information? 

    N a. 2182 kHz
    N b. 162.80 Mhz
    N c. 156.65 Mhz
    Y d. 162.55 Mhz
15166: At 2037, you change course and wish to make good a course of 016°T. There is no current, but an easterly wind is causing 3° leeway. What course per standard magnetic compass should you steer to make good the course 016°T? 

    N a. 022°psc
    N b. 025°psc
    Y c. 028°psc
    N d. 031°psc
15464: What is the course per standard magnetic compass on the southern leg of York Spit Channel between buoys "15" and "23"? 

    N a. 319°
    N b. 322°
    Y c. 339°
    N d. 341°
15645: You round Montauk Point and steer to make good 206°T. Speed is increased to 13.0 knots. The current, if any, is unknown. The visibility has improved and is estimated to be 5 miles. At 2144 Montauk Point Light bears 273°T. At 2202 the same light bears 320°T. Which statement concerning your 2202 running fix is TRUE? 

    N a. You are inside the lobster pot area.
    Y b. The fathometer reads about 12 fathoms.
    N c. You are inside of the 90 foot curve.
    N d. You are outside the boundary of the Territorial Sea and Contiguous Zone.
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)
15764: From your 0715 position, you set a course of 085°T. At 0745, you take the following bearings:

Race Rock Light 274°pgc
Watch Hill Point Light 045°pgc
Fisher's Island East Harbor Cupola 006°pgc

What was the current encountered between 0715 and 0745? 

    N a. Set 030°T,  drift 0.4 knot
    Y b. Set 070°T,  drift 0.7 knot
    N c. Set 210°T,  drift 0.8 knot
    N d. Set 238°T,  drift 1.0 knot
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
15908: At 0740, you obtain the following radar information:

Branford Reef Light bearing 250° true @ 2.55 nm

What is your position? 

    N a. LAT 41°12.6'N, LONG 72°51.3'W
    N b. LAT 41°12.6'N, LONG 72°51.8'W
    Y c. LAT 41°12.4'N, LONG 72°51.5'W
    N d. LAT 41°12.3'N, LONG 72°52.0'W
15910: At 0802, Branford Reef Light bears 348°T at 0.75 mile,
and the north point of Falkner Island bears 088°T at 6.7 miles. What were the set and drift since 0740? 

    N a. Set 040°T, drift .3 knot
    Y b. Set 220°T, drift .9 knot
    N c. Set 220°T, drift .3 knot
    N d. You are making good your intended course and speed.
16341: At 2230 you take the following visual bearings:

Montauk Point Light, Long Island 317°pgc
Southeast Point Light, Block Island 009°pgc

What is your position? 

    N a. LAT 40°51.2'N, LONG 71°35.9'W
    N b. LAT 40°51.5'N, LONG 71°36.4'W
    N c. LAT 40°52.2'N, LONG 71°36.6'W
    Y d. LAT 40°52.0'N, LONG 71°37.4'W
16345: Where will you cross the demarcation line between the International and Inland Rules of the Road? 

    N a. Between Montauk Point and Block Island
    Y b. In the Race
    N c. At the mouth of Bridgeport Harbor
    N d. Between Plum Gut and Niantic Bay
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
16843: At what time will you enter the inbound traffic lane with Buoy "NCA" (LL #375) bearing 180°T at 0.3 mile? 

    N a. 1003
    Y b. 0957
    N c. 0951
    N d. 0948