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.

52: You are downbound when you observe on your Mississippi River map a white square with a number inside located on either bank. This indicates __________.
245: On chart 12354, the datum from which heights of objects are taken is __________.
262: You are northwest of Port Jefferson Harbor steering 242° per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________.
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
304: A vessel steams 580 miles on course 083°T from LAT 13°12'N, LONG 71°12'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing? 

    N a. LAT 14°17'N, LONG 61°23'W
    N b. LAT 14°20'N, LONG 61°21'W
    Y c. LAT 14°23'N, LONG 61°19'W
    N d. LAT 14°25'N, LONG 61°17'W
351: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T? 

    N a. 0624
    N b. 0620
    Y c. 0609
    N d. 0601
372: If you change course at 0610, what is the course to steer to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")? 

    N a. 084°pgc
    Y b. 080°pgc
    N c. 076°pgc
    N d. 072°pgc
441: 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? 

    Y a. 080°pgc
    N b. 078°pgc
    N c. 076°pgc
    N d. 074°pgc
541: You depart LAT 16°24'S, LONG 169°38'W, for LAT 16°24'S, LONG 174°52'E. What are the course and distance by parallel sailing? 

    N a. 090°T, 301 miles
    N b. 090°T, 892 miles
    N c. 270°T, 301 miles
    Y d. 270°T, 892 miles
1192: On 3 October , your 0830 ZT position is LAT 26°15.0'S, LONG 73°16.0'E. Your vessel is on course 280°T at a speed of 19.0 knots. What is the ZT of local apparent noon (LAN)? 

    N a. 1151
    N b. 1154
    N c. 1158
    Y d. 1201
1218: It is 22 February , and you are keeping zone time +12. You are on course 267°T, speed 22 knots. Your 0800 DR position is LAT 28°15.0'N, LONG 179°18.0'W. What is the time of the second estimate of LAN by ship's clocks? 

    N a. 11h 17m 02s
    N b. 11h 50m 42s
    N c. 12h 16m 01s
    Y d. 12h 18m 00s
1416: Which company does NOT have a marine facility along the river bank in Madison Parish (mile 457.0 AHP)? 

    N a. Complex Chemical Co.
    N b. Delta Southern Railroads
    N c. Mid-Delta Helena, LLC
    Y d. Baxter Wilson
1457: On 25 August , your 1926 zone time DR position is LAT 24°17.0'S, LONG 05°47.0'W. At that time, you observe Fomalhaut bearing 117°psc. The chronometer reads 07h 26m 52s, and the chronometer error is 00m 15s fast. The variation is 1.5°E. What is the deviation of the standard magnetic compass? 

    N a. 0.2°W
    N b. 0.4°E
    N c. 1.3°W
    Y d. 2.8°W
1541: At 0119, on 10 September, you pass Springfield Bend Lt. (mile 244.8 AHP) and estimate the current will average 2.5 mph for the remainder of your trip. What is your ETA at the mouth of the Ohio River if you are making turns for 8.5 mph? 

    N a. 1746, 12 September
    N b. 1244, 13 September
    Y c. 2329, 14 September
    N d. 0210, 15 September
1650: On 22 October , in DR position LAT 21°51.0'S, LONG 76°24.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256°psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2°E. What is the deviation of the standard magnetic compass? 

    N a. 0.3°E
    Y b. 0.3°W
    N c. 2.0°E
    N d. 2.0°W
1663: On 7 April , in DR position LAT 27°42.0'N, LONG 114°03.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 076°psc. The chronometer reads 02h 10m 17s and is 01m 52s slow. Variation in the area is 8°E. What is the deviation of the standard magnetic compass? 

    Y a. 1.8°W
    N b. 2.3°E
    N c. 6.2°E
    N d. 7.8°W
1708: At 0300 on 19 April, you pass under the Greenville Bridge (mile 531.3 AHP). What was your average speed since departing Amoco Pipeline Co. Docks (mile 253.6 AHP)? 

    N a. 6.2 mph
    N b. 5.2 mph
    N c. 4.8 mph
    Y d. 4.3 mph
1747: As you pass under the Greenville Highway Bridge, you estimate the current as 3.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph? 

    N a. 14.5 mph
    N b. 13.5 mph
    Y c. 12.5 mph
    N d. 11.5 mph
1757: What town is located at mile 395 AHP? 

    Y a. St. Joseph
    N b. Belmont
    N c. St. James
    N d. Rodney
1914: On 14 January , your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 192°T at an observed altitude (Ho) of 06°15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe? 

    N a. Gienah
    N b. Kochab
    Y c. Gacrux
    N d. Eltanin
1964: The Platte River empties into which river? 

    N a. Mississippi
    Y b. Missouri
    N c. Ohio
    N d. Tennessee
2100: From your 2118 position, you are steering 288°T at an engine speed of 7.0 knots. If visibility is suddenly reduced to 2 miles, at what time can you expect Old Point Comfort Light to become visible again? 

    N a. The light is visible at 2118.
    N b. 2155
    N c. 2220
    Y d. 2232
2654: You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light? 

    Y a. 0420
    N b. 0423
    N c. 0426
    N d. 0429
2718: What organization has an installation at the uppermost end of Carthage Revetment? 

    N a. City of Natchez (waterfront)
    Y b. River Cement Co.
    N c. J.M. Jones Lumber
    N d. International Paper Co.
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
3055: The propeller on a vessel has a diameter of 24.6 feet and a pitch of 26.1 feet. What would be the apparent slip if the vessel cruised 462 miles in a 24 hour day (observed distance) at an average RPM of 72? 

    N a. -2.7%
    N b. +2.7%
    Y c. -3.8%
    N d. +3.8%
3067: From 1020, 3 March, to 1845, 5 March, your vessel steamed an observed distance of 845.6 miles. The average RPM was 78, and the pitch of the propeller was 20'03". What was the slip? 

    N a. -4%
    Y b. +4%
    N c. -8%
    N d. +8%
3107: You are turning 68 RPM, with a propeller pitch of 18 feet, and an estimated slip of +2%. What is the speed of advance? 

    N a. 10.7 knots
    N b. 11.5 knots
    Y c. 11.8 knots
    N d. 12.3 knots
3253: You have steamed 925 miles at 13.5 knots, and consumed 181 tons of fuel. If you have 259 tons of usable fuel remaining, how far can you steam at 16 knots? 

    N a. 795 miles
    Y b. 942 miles
    N c. 1117 miles
    N d. 1409 miles
3305: You have steamed 201 miles and consumed 18.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 482 miles? 

    N a. 25.2 tons
    Y b. 43.2 tons
    N c. 52.6 tons
    N d. 103.5 tons
4001: 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 magnetic compass heading of 143°.
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. 2.0°W
    N b. 1.5°W
    N c. 0.5°W
    N d. 0.0°
10306: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to LAT 41°00.0'N, LONG 71°40.0'W? 

    N a. 145.5°psc
    Y b. 142.5°psc
    N c. 138.5°psc
    N d. 127.0°psc
11108: The passage between Great Gull Island and Plum Island __________. 

    N a. is subject to weak and variable tidal currents
    N b. uncovers at extreme low water
    Y c. should be avoided
    N d. shows a whirlpool at maximum ebb current when accompanied by NW gales
12100: You sight Wolf Trap Light in line with New Point Comfort Spit Light "2" bearing 040° per standard magnetic compass. You are on course 319° per standard magnetic compass. Based on this, you __________. 

    Y a. know the compass error is 8°W
    N b. should apply 3°Easterly deviation to the bearing
    N c. know the deviation table is incorrect
    N d. should suspect the compass may be affected by a local magnetic disturbance
12100: You sight Wolf Trap Light in line with New Point Comfort Spit Light "2" bearing 040° per standard magnetic compass. You are on course 319° per standard magnetic compass. Based on this, you __________. 

    Y a. know the compass error is 8°W
    N b. should apply 3°Easterly deviation to the bearing
    N c. know the deviation table is incorrect
    N d. should suspect the compass may be affected by a local magnetic disturbance
12308: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 094° per standard magnetic compass. If your vessel was heading 207° per standard magnetic compass at the time, which of the following is TRUE? 

    Y a. The deviation table is correct for that heading.
    N b. The deviation by observation is 3°E.
    N c. The compass error is 12°W.
    N d. You should subtract 18° from all bearings of 094°.
13005: At 1715 your position is LAT 41°00.0'N, LONG 72°40.0'W. You are making turns for 15.5 knots. What is your ETA at a position 1.5 miles due south of Stratford Shoal Middle Ground Light? 

    N a. 1820
    N b. 1824
    N c. 1828
    Y d. 1832
13406: You are planning to anchor your vessel at LAT 41°01.1'N, LONG 73°02.8'W. What type of bottom should you expect at this position? 

    N a. Gray sand
    N b. Soft mud
    Y c. Gray mud
    N d. Hard sand
14101: What signal is given by air horn to indicate that Bonneville Lock is ready for entrance? 

    N a. two long blasts
    N b. two short blasts
    N c. one short blast
    Y d. one long blast
15007: What course should you steer using the standard magnetic compass (psc) to make good the course of 192°pgc? 

    N a. 188°psc
    N b. 195°psc
    Y c. 203°psc
    N d. 205°psc
15160: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA"? 

    N a. 249.0°psc
    N b. 251.5°psc
    N c. 255.0°psc
    Y d. 257.0°psc
15644: At 2045 You take the following set of bearings:

Watch Hill Point Light bears 005° true
Montauk Point Light bears 350° true

Determine your 2103 fix. 

    Y a. LAT 41°09.2'N, LONG 71°52.5'W
    N b. LAT 41°09.1'N, LONG 71°52.2'W
    N c. LAT 41°09.0'N, LONG 71°52.9'W
    N d. LAT 41°08.8'N, LONG 71°52.5'W
16009: The maximum ebb current at a location 4.3 miles south of Stratford Point will occur at 0413. The predicted current will be 1.0 knot at 075°. What will be your course made good if you steer 082°T at 8 knots? 

    Y a. 081°T
    N b. 083°T
    N c. 085°T
    N d. 087°T
16344: After changing course to allow for a current of 090°T at 1.0 knot, what time will Endeavor Shoals Lighted Gong Buoy "3" be abeam to port? 

    N a. 2340
    N b. 2345
    Y c. 2350
    N d. 2355
16407: At 0227, you are on course 087°T at 10 knots. What course per standard magnetic compass should you steer to make good your true course? 

    N a. 099°psc
    N b. 102°psc
    Y c. 105°psc
    N d. 109°psc
16413: At 1104, Watch Hill Point Light is in line with Stonington Outer Breakwater Light, the range to the south tip of Watch Hill Point is 2.6 miles and the range to the beach is 1.9 miles. You are steering to make good 075°T, speed 10.0 knots. At 1110, you change course to head for a position of LAT 41°05.0'N, LONG 71°50.0'W. What is the true course? 

    N a. 185°
    N b. 187°
    Y c. 190°
    N d. 193°
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
20106: You are steaming at 22 knots and burning 319 barrels of fuel per day. You must decrease your consumption to 137 barrels per day. What must you reduce your speed to in order to burn this amount of fuel? 

    N a. 12.4
    N b. 14.8
    Y c. 16.6
    N d. 18.2