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.
85: You are turning for 10 mph, approaching Angola, LA. Angola reports that the current at Red River Landing is estimated at 4.5 mph. Which of the following statements is TRUE?
Y a. You should expect to encounter vessels crossing the river at mile 300.5 AHP N b. You are making 14.5 mph over the ground. N c. You would expect to find a more favorable current near the broken red line in the river. N d. Hog Pt. Light and Hog Pt. Lower Light may be used as range lights when entering Shreves cut-off. 120: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 5.5 mph Y b. 6.0 mph N c. 8.0 mph N d. 11.0 mph 147: After passing Oak Bend Lt. (mile 425.6 AHP) you see a light gray shaded area extending into the river shown on the map. This indicates a __________.
N a. fleeting area N b. weir N c. dike Y d. revetment 188: At 2020, what is the course to steer to enter the inbound lane of North Chesapeake Entrance traffic separation scheme if a northwesterly wind causes 3° of leeway?
N a. 227°pgc Y b. 221°pgc N c. 218°pgc N d. 215°pgc 263: As you enter the New Haven Outer Channel, you sight the range markers in line directly over the stern. Your heading at the time is 155.5° per gyrocompass. What is the gyro error?
N a. 1.0°E N b. 1.0°W N c. 2.0°E Y d. 2.0°W 291: What is the height above water of Davis Creek Channel Light "1"?
Y a. 15 feet (4.6 meters) N b. 17 feet (5.2 meters) N c. 19 feet (5.8 meters) N d. 24 feet (7.3 meters) 347: If you change course at 0420, what is the course to make good to leave Twenty Eight Foot Shoal Lighted Buoy abeam to port at 1 mile?
N a. 086°T Y b. 084°T N c. 082°T N d. 079°T 377: You depart LAT 22°35.0'N, LONG 157°30.0'W, and steam 4505.0 miles on course 135°T. What are the latitude and longitude of your arrival by Mercator sailing?
Y a. 30°30.5'S, 102°35.3'W N b. 30°30.5'S, 104°30.0'W N c. 32°20.0'S, 102°35.3'W N d. 32°20.0'S, 104°30.0'W 437: 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. 109°psc Y b. 105°psc N c. 102°psc N d. 099°psc 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 560: Which loran line can you follow to remain clear of all danger until south of New London?
Y a. 9960-Y-43960 N b. 9960-X-26450 N c. 9960-W-14900 N d. 9960-W-15000 597: Which daymark will you see as you approach Natchez Beam Lt. (mile 364.8 AHP)?
N a. Red diamond N b. White square N c. Green square Y d. Red triangle 630: You are on a voyage from Corpus Christi, TX, to Fort de France, Martinique. The distance from pilot to pilot is 2190 miles (2521 statute miles). The speed of advance is 15.0 knots. You estimate a layover in Charlotte Amalie, Virgin Islands, of 16.0 hours. If you take departure at 0654 (ZD +6), 27 November, what is your ETA (ZD +4) at Fort de France?
N a. 2054, 3 December N b. 2254, 3 December Y c. 0254, 4 December N d. 2054, 4 December 702: If the highest point of your towboat is 54 feet above the water and the Natchez Gage reads 24.8 feet, what will be your vertical clearance when passing under the Natchez-Vidalia westbound Highway Bridge?
N a. 35.9 feet N b. 43.2 feet Y c. 47.2 feet N d. 57.5 feet 753: On 10 June , your 2010 zone time DR position is LAT 41°10.0'N, LONG 61°15.0'W. At that time, you observe Polaris with a sextant altitude (hs) of 40°35.8'. The chronometer time of the sight is 00h 08m 18s, and the chronometer error is 01m 54s slow. The index error is 2.0' on the arc, and the height of eye is 40 feet. What is your latitude by Polaris?
N a. 41°10.6'N Y b. 41°15.0'N N c. 41°18.3'N N d. 41°21.2'N 1093: On 22 Nov. , your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0'S, LONG 42°40.0'W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix. NP-0023
Y a. LAT 28°27.0'S, LONG 42°38.0'W N b. LAT 28°25.2'S, LONG 42°40.0'W N c. LAT 28°25.0'S, LONG 42°36.0'W N d. LAT 28°23.4'S, LONG 42°42.0'W 1136: The Arkansas City Yellow Bend revetment on the LMR extends from mile __________.
Y a. 555.0-549.7 RDB N b. 549.0-548.5 RDB N c. 556.9-554.9 LDB N d. 548.5-546.5 LDB 1237: At 1118, on 24 May, you pass Natchez Gage and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at Cairo, IL if you continue to turn for 10 mph?
N a. 0840, 26 May N b. 2218, 26 May Y c. 2339, 27 May N d. 0339, 28 May 1283: On 5 May , your 1800 ZT DR position is LAT 26°11.5'N, LONG 65°35.0'W. You are on course 270°T at a speed of 12 knots. What will be the ZT of sunset at your vessel?
N a. 1825 N b. 1840 Y c. 1857 N d. 1901 1462: On 17 June , your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?
N a. 0.7°W Y b. 3.5°W N c. 3.7°E N d. 2.3°E 1536: As you approach Casting Yard Dock Lt. (mile 265.4 AHP) you notice on the map a circle with 2 black sectors. This symbol indicates a __________.
N a. lock N b. warning sign Y c. river gage N d. mooring buoy 1690: The locations of locks and dams can be found in the __________.
N a. Army Corps. of Engineers maps Y b. Light List N c. Local Notice to Mariners N d. Channel Report 1726: The highest point on your towboat is 57 feet above water. The Natchez Gage (mile 363.3 AHP) reads 16.7 feet. What is the vertical clearance when you pass under the Natchez - Vidalia (westbound) Hwy. Bridge?
Y a. 52.3 feet N b. 59.9 feet N c. 61.0 feet N d. 68.6 feet 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 1739: The Delta-Friar Point revetment on the LMR extends from mile __________.
N a. 645.6 - 641.4 RDB N b. 652.8 - 649.6 RDB N c. 648.5 - 645.5 LDB Y d. 657.3 - 652.2 LDB 1746: The Crooked River empties into which river?
Y a. Missouri N b. Mississippi N c. Tennessee N d. Ohio 1836: Which daymark should you see as you approach French Point Light (mile 915.4 AHP)?
N a. Green diamond N b. Green square Y c. Red triangle N d. Red diamond 1875: On 2 October , your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 68°03.6' bearing 154°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?
Y a. Alpha Indi N b. Epsilon Cygni N c. Gamma Aquilae N d. Albireo 2007: On 4 September , your 1813 zone time DR position is LAT 24°18.0'S, LONG 95°16.0'E. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
N a. Enif, Miaplacidus, Alkaid N b. Betelgeuse, Acrux, Hamal Y c. Rasalhague, Fomalhaut, Spica N d. Deneb, Altair, Vega 2016: On 23 March , your 1600 ZT DR position is LAT 27°16.3'N, LONG 156°48.2'W. You are on course 063°T at a speed of 18.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
N a. Arcturus, Regulus, Sirius N b. Procyon, Sirius, Capella Y c. Hamal, Rigel, Alphard N d. Betelgeuse, Dubhe, Regulus 2027: At 0645, on the 17th of April, you pass Hole in the Wall Lt. (mile 373.4 AHP). What has been your average speed since departing the Exxon Refinery?
N a. 5.8 mph Y b. 6.3 mph N c. 6.7 mph N d. 7.1 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 2092: At your current speed of 23 knots you only have enough fuel remaining to travel 386 miles. You must travel 785 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 19.3 N b. 17.7 Y c. 16.1 N d. 14.5 2205: What are the dimensions of Old River Lock, on the Lower Mississippi River?
N a. 1202 feet x 84 feet Y b. 1190 feet x 75 feet N c. 760 feet x 75 feet N d. 425 feet x 75 feet 2340: You have steamed 775 miles at 17 knots, and consumed 145 tons of fuel. If you have to steam 977 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 18 knots?
Y a. 204 tons N b. 181 tons N c. 163 tons N d. 129 tons 2371: Which of the following statements are TRUE?
N a. Oil well structures are listed in the Light List. N b. All aids to navigation with lights have lateral significance. Y c. On the Western Rivers, crossing marks may exhibit white lights. N d. None of the above. 2587: What VHF frequency would you use to listen to a weather forecast for the eastern part of Long Island Sound?
N a. 156.65 MHz N b. 156.85 MHz Y c. 162.475 MHz N d. 162.775 MHz 2695: You are underway on course 017°T at a speed of 14.2 knots.
You sight a buoy bearing 025°T at a radar range of 3.7 miles at 1947. If you change course at 1953, what is the course to steer to leave the buoy abeam to starboard at 0.1 mile?
N a. 021°T N b. 024°T Y c. 027°T N d. 030°T 2778: What company does NOT have a marine facility along the river bank in Helena (mile 658 to 665 AHP)?
N a. Texas Eastern Pipeline Co. N b. Helena Port Terminal, Inc. N c. Arkansas Power & Light Co. Y d. Helena Grain Co. 2784: You pass Ratcliff Light (mile 289.8) at 1650. What was your average speed since leaving Baton Rouge?
N a. 7.3 mph Y b. 7.6 mph N c. 8.0 mph N d. 8.3 mph 2887: Your vessel is steering 283°T at 10 knots. At 0538 a light bears 350°T, and at 0552 the same light bears 002°T. What will be your distance off abeam?
N a. 9.6 miles Y b. 10.3 miles N c. 10.7 miles N d. 11.3 miles 3060: The propeller on a vessel has a diameter of 24.0 feet and a pitch of 21.3 feet. What would be the slip if the vessel cruised 510 miles in a 24 hour day (observed distance) at an average RPM of 86?
N a. -12.2% N b. +12.2% Y c. -17.5% N d. +17.5% 3627: Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?
N a. 242°T N b. 244°T N c. 246°T Y d. 248°T 4010: 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 104°.
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°
N a. 1.8°E N b. 2.6°E Y c. 2.2°W N d. 2.7°W 10702: At 1922 your position is LAT 41°09.2'N, LONG 71°40.6'W. You are on course 028° per standard magnetic compass at 6.4 knots. At 2046 your position is LAT 41°17.2'N, LONG 71°38.6'W. What were the set and drift?
Y a. 235°T at 0.8 knot N b. 247°T at 1.1 knots N c. 049°T at 0.7 knot N d. 062°T at 1.0 knots 13502: The four soundings in the vicinity of LAT 41°12.2'N, LONG 71°33.0'W, that are underlined with a bracket indicate __________.
N a. that no bottom was found at the sounding depth indicated N b. a submerged rock not dangerous to surface navigation N c. the height a rock uncovers at low water springs Y d. a submerged danger that is cleared to the indicated depth by a wire drag 14503: You have just cleared Bonneville Lock and are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville reservoir stands at 78 feet above MSL. If the highest point on your vessel is 46 feet above the water, what will be the vertical clearance when you pass under the overhead power cables at mile 146.5?
N a. 134 feet Y b. 138 feet N c. 144 feet N d. 150 feet 15620: From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 13 knots, at what time should you arrive at Crisfield, MD?
N a. 2359 Y b. 0037 N c. 0112 N d. 0148 15621: What is the length of the trip?
N a. 899.6 miles N b. 878.9 miles Y c. 851.9 miles N d. 726.0 miles 15841: At 2030 you take the following bearings:
Sand Shoal Inlet South Light - 275°T
Cape Charles Light - 235°T
The set and drift from 2000 to 2030 are __________.
N a. 088° at 0.7 knot N b. 088° at 1.4 knots N c. 268° at 0.7 knot Y d. 268° at 1.4 knots 15846: At 2200, you alter course to 204°T, at 14 knots. You expect a current on this leg of the trip, setting 325° at 1.5 knots. Which course should you steer per gyro compass to make good the true course?
N a. 184°pgc N b. 190°pgc N c. 194°pgc Y d. 201°pgc 16038: At 0820 Old Field Point Light bears 206° per gyrocompass,
and Stratford Shoals Middle Ground Light bears 322° per gyrocompass. The radar range to Middle Ground Light is 1.5 miles. Your 0820 fix gives you a position of __________.
N a. LAT 41°02.6'N, LONG 73°05.2'W Y b. LAT 41°02.5'N, LONG 73°04.9'W N c. LAT 41°02.3'N, LONG 73°05.2'W N d. LAT 41°02.0'N, LONG 73°05.1'W 16146: From your 2054 position, you change course to 066°T. Maintaining course and speed of 18 knots, at what time can you expect to first cross the 90-foot curve if you experience no set and drift?
Y a. 2105 N b. 2111 N c. 2117 N d. 2125 16207: 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. 072°pgc N b. 076°pgc Y c. 080°pgc N d. 084°pgc 16612: At 0112, what is the approximate depth under the keel?
Y a. 38 feet (11.5 meters) N b. 47 feet (14.2 meters) N c. 51 feet (15.5 meters) N d. 57 feet (17.3 meters) 16746: In order to check your compasses, you sight Race Rock Light in line with New London Harbor Light bearing 336° per gyrocompass. The helmsman reports the vessel was heading 275.0°pgc and 290.5° per standard magnetic compass at the time of the observation. Which statement is TRUE?
N a. The gyro error is now 2°E. Y b. The deviation table is correct for that heading. N c. The vessel should be swung to check the deviation table. N d. The compass error is 0.5°W.