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.
103: You are approaching the Old River Control Structure (mile 314.5 AHP). The structure is in operation. Which of the following statements is TRUE?
N a. The maximum speeds permitted when passing the channel are 10 mph downbound and 7.5 mph upbound. N b. Tows must be no more than 110 feet wide when passing the inflow channel. Y c. You should navigate as close to the left descending bank of the Mississippi River as safety permits. N d. Tow length should not exceed 850 feet when passing the inflow channel. 139: What is the distance to Caruthersville Gage from Cape Girardeau?
N a. 54.4 miles Y b. 160.4 miles N c. 793.4 miles N d. 899.4 miles 151: What is the distance from the Memphis Gage to the Redneb Services Dock in New Orleans, LA.
N a. 460 miles N b. 503 miles N c. 588 miles Y d. 633 miles 154: You see a buoy with red and green bands. This buoy marks __________.
N a. the center of the channel Y b. the preferred channel N c. a channel crossing N d. an isolated danger 277: What chart should you use after you enter New London Harbor?
N a. 13211 N b. 13214 Y c. 13213 N d. 13272 427: Assuming no current, at what time can you expect to be abeam of Townshend Ledge Lighted Buoy?
Y a. 0910 N b. 0905 N c. 0902 N d. 0859 433: What true course and speed did you make good between 0730 and 0900?
N a. 271°T, 8.9 knots N b. 273°T, 8.7 knots Y c. 277°T, 8.4 knots N d. 284°T, 7.5 knots 457: Determine the great circle distance and initial course from LAT 31°57.0'S, LONG 115°52.0'E to LAT 24°47.0'N, LONG 66°59.0'E.
N a. 4516 miles, 134.5°T Y b. 4407 miles, 314.5°T N c. 4402 miles, 319.5°T N d. 4378 miles, 336.8°T 471: The great circle distance from LAT 35°57.2'N, LONG 05°45.7'W to LAT 24°25.3'N, LONG 83°02.6'W is 3966.5 miles and the initial course is 283.7°T. The latitude of the vertex is 38°09.4'N. What is the longitude of the vertex?
N a. 28°02.6'W Y b. 28°18.2'W N c. 28°46.3'W N d. 28°54.7'W 476: The great circle distance from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E is 4559 miles and the initial course is 121°T. Determine the longitude of the vertex.
N a. 26°50.9'E Y b. 65°45.9'E N c. 69°19.1'E N d. 72°18.3'E 547: At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 100°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 267°pgc Y b. 263°pgc N c. 255°pgc N d. 250°pgc 552: If the visibility is 10 miles, what is the earliest time you can expect to see New Haven Light?
N a. 0500 N b. 0508 N c. 0514 Y d. You will not sight the light. 658: You are planning a voyage by great circle from LAT 59°00'N, LONG 07°00'W via LAT 38°00'N, LONG 61°30'W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. You are to the east of the Northern Hemisphere vertex. N b. When plotted on a Mercator chart the track line will be concave to Cape Farwell (Kap Farvel). Y c. All courses are in the southwest quadrant of the compass. N d. Distance is measured by using the length of a degree of latitude at the midpoint of the track line. 674: What are the dimensions of the Port Allen Lock at Baton Rouge, LA?
N a. 75 feet x 1188 feet Y b. 84 feet x 1188 feet N c. 84 feet x 1180 feet N d. 75 feet x 1180 feet 1132: Which light will you be passing at 0059, on 22 September, if you make good 9.2 knots?
Y a. Obion Bar Lt. N b. Kate Aubrey Lt. N c. Trotter Lt. N d. Quaker Oats Lt. 1210: It is 19 October and you are keeping +4 zone time. You are on course 275°, speed 16 knots. Your 0800 DR position is LAT 25°34.0'N, LONG 74°36.0'W. What is the second estimate of the time of LAN by ship's clocks?
N a. 11h 48m 38s N b. 12h 04m 49s Y c. 12h 49m 10s N d. 13h 48m 36s 1340: At 1300, 5 January, the river will be temporarily closed to navigation for six hours at mile 531.3 AHP due to repairs to a bridge. What minimum speed over the ground must you make from Natchez Gage in order not to be delayed?
N a. 5.7 mph Y b. 6.0 mph N c. 6.8 mph N d. 7.3 mph 1479: On 6 November , your vessel's 0706 zone time DR position is LAT 25°30.0'N, LONG 85°35.0'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 01h 03m 30s, and the Sun is bearing 114.0°pgc. The chronometer error is 02m 30s slow, and the variation in the area is 2°.
What is the gyro error?
N a. 0.8°E N b. 0.8°W N c. 2.0°W Y d. 2.0°E 1544: What is the distance in river miles, from the new mouth of the White River to the Petroleum Fuel & Terminal Co.(144.6 AHP)?
N a. 370 miles N b. 384 miles N c. 437 miles Y d. 454 miles 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 1680: On 31 October , your 1700 zone time DR position is LAT 27°17.0'N, LONG 116°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 246.5° per standard magnetic compass. Variation in the area is 8.5°E. The chronometer reads 01h 01m 23s and the chronometer error is 01m 54s slow. What is the deviation of the standard compass?
N a. 0.8°E Y b. 0.8°W N c. 2.5°E N d. 2.5°W 1839: What are the dimensions of the channel maintained from Baton Rouge to New Orleans, LA?
N a. 30 feet x 300 feet N b. 40 feet x 300 feet N c. 30 feet x 500 feet Y d. 45 feet x 500 feet 1841: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 1.8 mph N b. 2.1 mph Y c. 4.4 mph N d. 5.6 mph 1916: On 14 January , your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 250°T at an observed altitude (Ho) of 31°01.2'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. Which star did you observe?
N a. Elnath Y b. Fomalhaut N c. Pollux N d. Markab 1954: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks?
Y a. 1444, 27 Aug N b. 2214, 27 Aug N c. 0844, 28 Aug N d. 1454, 28 Aug 1958: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)?
Y a. Green square N b. Green triangle N c. Green diamond N d. Red square 2583: You lose GPS and are navigating solely on LORAN. What LORAN line would you follow to leave Six Mile Reef buoy "8C" abeam to port at 1.0 mile?
N a. 9960-W-14885.0 N b. 9960-Y-43980.5 Y c. 9960-Y-43982.0 N d. 9960-Y-43983.5 2684: You are steering 173°T, and a light is picked up dead ahead at a distance of 13.9 miles at 0054. You change course to pass the light 4.5 miles off abeam to port. If you are making 21 knots, what is your ETA at the position 4.5 miles off the light?
N a. 0122 N b. 0125 Y c. 0131 N d. 0134 2706: While on a course of 216°pgc, a light bears 12° on the port bow at a distance of 11.2 miles. Which course should you steer to pass 2 miles abeam of the light leaving it to port?
N a. 208°pgc N b. 210°pgc N c. 212°pgc Y d. 214°pgc 2883: Your vessel is steering 157°T at 18 knots. At 2018 a light bears 208°T. At 2044 the same light bears 232°T. What will be your distance off when abeam?
N a. 12.8 miles Y b. 14.4 miles N c. 15.2 miles N d. 16.7 miles 2898: You are steaming on a course of 267°T at 22 knots. At 0433 you observe a lighthouse bearing 290°T. At 0452 the lighthouse bears 328°T. What is your distance off at the second bearing?
Y a. 4.5 nm N b. 5.9 nm N c. 6.6 nm N d. 7.2 nm 2898: You are steaming on a course of 267°T at 22 knots. At 0433 you observe a lighthouse bearing 290°T. At 0452 the lighthouse bears 328°T. What is your distance off at the second bearing?
Y a. 4.5 nm N b. 5.9 nm N c. 6.6 nm N d. 7.2 nm 3256: You have steamed 918 miles at 15.0 knots, and consumed 183 tons of fuel. If you have 200 tons of usable fuel remaining, how far can you steam at 12 knots?
N a. 1021 miles N b. 1261 miles Y c. 1568 miles N d. 1960 miles 10611: You are off the coast of Mexico and are taking a time tick for 1800. At approximately 1754, you hear the preparatory signal "VVVV de XDD" from the time signal station. Then you hear a series of 1 second dashes followed by a 9 second silent period and then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 06h 00m 07s. When compared to the chronometer, the comparing watch reads 06h 01m 24s, and the chronometer reads 05h 59m 23s. What is the chronometer error?
N a. 0m 07s fast N b. 1m 17s fast N c. 0m 37s slow Y d. 1m 54s slow 10700: At 1020 your position is LAT 41°11.0'N, LONG 71°50.0'W. You are on course 056° per standard magnetic compass at 9.2 knots. At 1112 your position is LAT 41°15.9'N, LONG 71°41.7'W. What were the set and drift?
N a. 130°T at 0.9 knot Y b. 141°T at 1.2 knots N c. 331°T at 0.8 knot N d. 346°T at 1.1 knots 10700: At 1020 your position is LAT 41°11.0'N, LONG 71°50.0'W. You are on course 056° per standard magnetic compass at 9.2 knots. At 1112 your position is LAT 41°15.9'N, LONG 71°41.7'W. What were the set and drift?
N a. 130°T at 0.9 knot Y b. 141°T at 1.2 knots N c. 331°T at 0.8 knot N d. 346°T at 1.1 knots 11012: Which statement is FALSE with regard to Plum Island Harbor West Dolphin Light?
N a. The light is maintained from sundown to 0130 daily. Y b. The light is white. N c. The light is maintained by the U.S. Dept. of Agriculture. N d. The light is located on a dolphin. 11101: Great Salt Pond on Block Island is __________.
Y a. entered through a dredged cut N b. not accessible in easterly gales N c. available for vessels up to a maximum draft of 8 feet (2.4m) N d. not affected by the tide 12505: You are on course 056°psc, when you take the following bearings:
New Point Comfort Spit Light "2" 260°psc Horn Harbor Entrance Light "HH" 285°psc Wolf Trap Light 336°psc What is the position of the fix?
Y a. LAT 37°19.3'N, LONG 76°08.5'W N b. LAT 37°19.3'N, LONG 76°08.8'W N c. LAT 37°19.2'N, LONG 76°08.2'W N d. LAT 37°19.2'N, LONG 76°08.7'W 14005: At 0800 your vessel is at mile 110 on the Columbia River. You are steaming in an easterly direction. At 0854 Lady Island Range is in line dead astern and Government Island Upper Range is in line on your port quarter. What speed have you averaged?
N a. 8.1 mph N b. 8.5 mph Y c. 9.4 mph N d. 10.2 mph 15070: As you enter New London Harbor, you are steering on the entrance range. The lights are in line over the bow as you are heading 352°pgc. What is the gyro error?
Y a. 2°E N b. 0° N c. 1°W N d. 3°W 15213: At 2015, your vessel is at the Chesapeake Bay Bridge and Tunnel midway between buoys "13" and "14". If the height of tide is -1 foot (-0.3 meters), what is the approximate depth of water?
Y a. 53 feet (15.5 meters) N b. 46 feet (13.9 meters) N c. 40 feet (12.1 meters) N d. 35 feet (10.6 meters) 15340: At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°
T. At 1750 Race Rock Light bears 336°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?
N a. 245°T at 0.9 knots N b. 245°T at 1.7 knots Y c. 065°T at 1.7 knots N d. 065°T at 0.9 knots 15416: At 2200, you are in position LAT 36°57.5'N, LONG 76°02.5'W. You intend to travel up the Thimble Shoals auxiliary Channel to Hampton Roads. According to the Coast Pilot,
what is the depth of the auxiliary channel on either side of the main channel?
N a. 28 feet (8.5 meters) Y b. 32 feet (9.8 meters) N c. 36 feet (11.0 meters) N d. 45 feet (13.7 meters) 15513: If your height of eye is 35 feet (10.7 meters), what is the approximate geographic range of Block Island North Light?
N a. 7.4 nm N b. 13.0 nm N c. 14.3 nm Y d. 15.8 nm 15545: At 2342 the gyro alarm sounds and you commence steering by standard magnetic compass. If you allow 3° leeway for southerly winds and do not correct for any existing current, what is the course to steer by standard magnetic compass to make good 068°T?
N a. 054.0° N b. 079.5° N c. 081.0° Y d. 084.5° 15628: 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?
Y a. 58.0 feet N b. 64.1 feet N c. 72.5 feet N d. 78.6 feet 15662: At 0748, you take the following bearings:
Watch Hill Point Light bearing 026.5°pgc
Race Point Light bearing 275.5°pgc
What is the approximate depth of water under the keel at this position?
N a. 325 feet (98.5 meters) N b. 175 feet (53.0 meters) N c. 130 feet (39.4 meters) Y d. 112 feet (33.9 meters) 15667: At 0815, you change course to 079°T. To compensate for a southerly wind, you estimate a 3° leeway is necessary. Which course should you steer per standard magnetic compass to make good 079°T?
N a. 090°psc N b. 093°psc N c. 095°psc Y d. 099°psc 15742: At 2100 your position is LAT 40°58.5'N, LONG 71°46.0'W. You are proceeding north. At 2131 Montauk Point Light has a radar range of 5.1 miles and bears 284°T. Block Island Southeast Light has a radar range of 10.8 miles. What was the course made good from your 2100 position?
N a. 005°T Y b. 011°T N c. 017°T N d. 025°T 16113: After you enter Thimble Shoal Channel, you will alter course to pass between Trestle "A" and "B". Which channel should you use?
N a. Thimble Shoal Main Channel or the South Auxiliary Channel N b. Any of the channels but keep to the right hand side Y c. The South Auxiliary Channel N d. Thimble Shoal Main Channel 16306: At 0345, you set a course to depart New London Harbor. Assuming no set and drift, which standard magnetic compass course must you steer to stay in the middle of the channel?
N a. 175°psc Y b. 187°psc N c. 190°psc N d. 192°psc 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 16366: From your 0600 fix, you change course to 250°T. At 0605,
Cape Henry Light bears 250°T. At 0615, it bears 251°T. At 0625, it bears 252°T. Based on this you know you are __________.
Y a. being set to the south N b. being set to the north N c. meeting a current from dead ahead N d. running with a current from dead astern 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