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.
90: As you approach Giles Bend Cutoff Light (mile 367.7 AHP), what type of daymark would you see on the light structure?
N a. None N b. Red diamond N c. Red square Y d. Red triangle 149: Your engines are turning for 8.2 mph. You estimate the current at 1.5 mph. What is your speed over the ground?
Y a. 9.7 mph N b. 8.8 mph N c. 8.2 mph N d. 6.7 mph 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 255: From your 0130 position, you change course to adjust for set and drift, and you later obtain the following lbearings:
Mattituck Inlet Light bearing 104.5°true
Falkner Island Light bearing 001°true
What is the latitude and longitude of the fix?
N a. LAT 41°00.8'N, LONG 72°40.8'W N b. LAT 41°01.2'N, LONG 72°40.4'W Y c. LAT 41°02.0'N, LONG 72°39.5'W N d. LAT 41°02.6'N, LONG 72°39.0'W 317: Determine your 1915 position using the following information obtained at 1915.
Visual bearings
Cape Charles Light 107°pgc
Cape Henry Light 172°pgc
Radar Bearing and Range
Chesapeake Channel Tunnel South Light 189°pgc at 7.2 miles
N a. LAT 37°03.5'N, LONG 76°05.9'W N b. LAT 37°03.5'N, LONG 76°09.3'W Y c. LAT 37°09.3'N, LONG 76°03.1'W N d. LAT 37°09.8'N, LONG 76°04.1'W 481: The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. Determine the latitude of the vertex.
N a. 37°32.2'N Y b. 37°34.9'N N c. 37°41.6'N N d. 37°45.2'N 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 571: At 0845, you are approaching the entrances to Thimble Shoal Channel. What channel must you use?
N a. The South Auxiliary Channel or Thimble Shoal Channel, but you must remain on the right hand side of the channel. Y b. The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters) and you are not a passenger vessel. N c. The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12". N d. You are not permitted to use any of the channels, but must remain outside the buoyed channel line. 683: Which type of daymark would you see on the Belle Island Corner Lt. at mile 458.6 AHP?
N a. Green - Diamond N b. Green - Square N c. Red - Triangle Y d. Red - Diamond 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 1124: The Vicksburg Gage reads 31.9 feet. The high point on your towboat is 43 feet above the water. What is the vertical clearance as you pass under the Vicksburg Highway 80 Bridge?
N a. 36.2 feet Y b. 41.4 feet N c. 58.0 feet N d. 84.3 feet 1224: What is the total length of the trip?
N a. 906.3 miles Y b. 922.3 miles N c. 1155.8 miles N d. 1187.3 miles 1273: At 1544 zone time, on 5 October , your DR position is LAT 25°00'N, LONG 60°15'W. You are steering 270°T at a speed of 6.8 knots. What is the zone time of sunset?
N a. 1728 N b. 1737 N c. 1741 Y d. 1745 1287: As you approach Buckridge Light (mile 412.5 AHP),
which type of daymark would you see on the light structure?
N a. Red diamond N b. Red triangle Y c. Green square N d. Green diamond 1489: On 23 July , your 2100 ZT position is LAT 36°43.0'N, LONG 16°09.8'W, when you observed an azimuth of Polaris to determine the compass error. Polaris bears 359.0° per gyrocompass. At the time of the observation, the helmsman noted that he was heading 319.0° per gyrocompass and 331.0° per standard compass. Variation is 12.0°W. Which of the following statements is TRUE?
N a. The gyro error is 0.7°E. N b. The gyro error is 1.7°W. Y c. The deviation is 1.7°E. N d. The compass error is 13.7°W 1667: On Sunday, 8 November, your ship is enroute from Texas City, TX, to Portland, ME. At 0632 ZT, you fix your position at LAT 27°06'N, LONG 90°36'W. When the lower limb of the Sun was two-thirds of a diameter above the visible horizon, the Sun bore 105° per standard magnetic compass. At this time the chronometer read 12h 39m 20s and is 3m 20s slow. If the variation is 3°E, determine the deviation of the standard compass.
Y a. 0.8°E N b. 0.8°W N c. 3.8°E N d. 3.8°W 1707: You are passing the Memphis Gage at 0405, 18 March. If you are turning for 8 mph and estimate the current at 2.3 mph,
what is your ETA at Cairo Point, IL (mile 954.5 AHP)?
N a. 0447, 19 Mar N b. 1052, 19 Mar N c. 1518, 19 Mar Y d. 1839, 19 Mar 1776: At 2231 ZT, on 14 July , in DR position LAT 34°06'S, LONG 149°47'W you observe an amplitude of Jupiter. The planet is about one Sun's diameter above the visible horizon and bears 257.1°psc. The variation is 15°E. What is the deviation?
N a. 0.5°E N b. 0.5°W N c. 1.5°W Y d. 2.5°W 1811: Where would you find out which buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP)?
Y a. Notice to Mariners N b. Bulletin board at the Rosedale Gage N c. Waterways Journal N d. None of the above 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 2280: You observe the lower limb of the Sun at a sextant altitude (hs) of 28°24.7' on 17 May . The index error is 1.5' off the arc. The height of eye is 86 feet (26 meters). What is the observed altitude (Ho)?
N a. 28°29.7' N b. 28°30.6' Y c. 28°31.5' N d. 28°32.9' 2590: You have maneuvered for traffic and at 2215 you obtain the following radar information:
Middle Ground Light bearing 287° pgc @ 6.65 nm
What course must you steer to arrive at buoy "PJ", passing 0.5 nm off "Mt Misery Shoal"?
N a. 237° psc N b. 257° psc Y c. 261° psc N d. 265° psc 2658: You are steering 202°T, and a light is picked up dead ahead at a distance of 14.6 miles at 2234. You change course to pass the light 5 miles off abeam to starboard. If you are making 21 knots, what is your ETA at the position 5 miles off the light?
N a. 2310 Y b. 2313 N c. 2316 N d. 2319 2667: Your vessel is on a course of 255°T, at 14 knots. At 2126 a lighthouse is sighted dead ahead at a distance of 11 miles. You change course at this time to pass the lighthouse 3 miles abeam to port. What will be your ETA at this position off the lighthouse?
N a. 2149 N b. 2201 Y c. 2211 N d. 2228 2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?
N a. 035°pgc Y b. 043°pgc N c. 051°pgc N d. 059°pgc 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 2857: Your vessel is on a course of 253°T at 18 knots. At 2027 a light bears 275.5°T, and at 2055 the light bears 298°T.
At what time and at what distance off will your vessel be when abeam of the light?
Y a. 2115, 5.9 miles N b. 2109, 6.4 miles N c. 2123, 7.3 miles N d. 2104, 7.7 miles 2861: Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and at what distance off will your vessel be when abeam of the light?
Y a. 0500, 5.0 miles N b. 0504, 6.2 miles N c. 0500, 6.2 miles N d. 0504, 5.0 miles 3075: If the speed necessary for reaching port at a designated time is 15.7 knots and the pitch of the propeller is 23.4 feet, how many revolutions per minute will the shaft have to turn, assuming a 6% negative slip?
Y a. 64 N b. 68 N c. 72 N d. 76 3078: If the speed necessary for reaching port at a designated time is 17.8 knots and the pitch of the propeller is 24.7 feet, how many revolutions per minute will the shaft have to turn, assuming a 7% positive slip?
N a. 67 N b. 71 N c. 75 Y d. 79 3088: If the pitch of the propeller is 21.5 feet, and the revolutions per day are 96,666, calculate the day's run allowing 9% negative slip.
N a. 311.1 miles N b. 341.8 miles N c. 357.9 miles Y d. 372.6 miles 3608: You are steering 125°pgc. The wind is southwest by south causing a 3° leeway. The variation is 6°E, the deviation is 2°W, and the gyro error is 1°W. What is the true course made good?
Y a. 121°T N b. 123°T N c. 127°T N d. 129°T 4003: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a gyro heading of 058°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324°
Y a. 1.5°W N b. 1.0°W N c. 1.0°E N d. 0.5°W 10505: 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 36°59.5'N, LONG 75°37.0'W. What was the current?
N a. 137° at 0.6 knot Y b. 150° at 1.0 knot N c. 331° at 0.7 knot N d. 347° at 0.7 knot 10701: At 0947 your position is LAT 41°15.9'N, LONG 71°41.7'W. You are on course 182° per magnetic compass at 11.3 knots. At 1020 your position is LAT 41°09.2'N, LONG 71°40.6'W. What were the set and drift?
N a. 211°T at 1.0 knot Y b. 229°T at 2.0 knots N c. 058°T at 1.8 knots N d. 043°T at 1.1 knots 13004: At 1815 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT 41°13.3'N, LONG 72°10.8'W)?
N a. 2019 N b. 2028 Y c. 2032 N d. 2038 13105: At 1048 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at the west gap of Point Judith Harbor of Refuge if you make good 8.3 knots?
N a. 1149 N b. 1154 N c. 1158 Y d. 1203 14004: At 1745 Lady Island Upper Range is in line dead astern and Washougal Lower Range is in line on the starboard bow. You are steaming in an easterly direction. What speed must you average to arrive abeam of Cape Horn Light No. 67 at 1839?
N a. 9.3 mph N b. 9.8 mph Y c. 10.2 mph N d. 10.8 mph 14301: What are the characteristics of Washougal Light on the Columbia River?
N a. Equal interval green, 6 seconds N b. Quick flashing red, 2 seconds N c. Flashing green, 4 seconds Y d. Flashing red, 2.5 seconds 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 15118: What was the speed made good from 1845 to 1930?
N a. 6.2 knots N b. 7.5 knots Y c. 8.3 knots N d. 9.4 knots 15156: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water is about __________.
N a. 38 feet (11.5 meters) N b. 45 feet (13.6 meters) Y c. 52 feet (15.8 meters) N d. 59 feet (17.3 meters) 15169: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck?
Y a. 1.7 miles N b. 2.5 miles N c. 3.6 miles N d. 10.9 miles 15629: In order to determine what buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP), what should you check?
N a. Bulletin board at the Rosedale Gage N b. Waterways Journal Y c. Notice to Mariners N d. Light List 15643: The light on Block Island Sound South Entrance Obstruction Buoy "BIS" is reported extinguished. Which of the following will serve as a positive warning that you are being set onto the obstruction?
N a. Radar ranges to Southwest Point of less than 7.9 miles N b. Soundings of less than 50 feet N c. Shagwong Reef Lighted Bell Buoy "7SR" 3.1 miles off abeam Y d. Race Rock Light bearing 299°T and decreasing 15768: At 0830, Watch Hill Point bears 343°T at 3.5 miles by radar. What was the speed made good since 0745?
Y a. 7.1 knots N b. 6.7 knots N c. 5.8 knots N d. 5.4 knots 16015: By 0430, the wind has increased, and the visibility cleared due to passage of a front. You estimate 3° leeway due to NW'ly winds. What is the course per gyrocompass to pass 1.2 miles due south of Twenty-eight Foot Shoal Lighted Buoy "TE"?
Y a. 080° N b. 083° N c. 086° N d. 090° 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 16415: You can follow what loran reading between your two positions?
N a. There is no loran reading to follow. N b. 9960-Y-43958 N c. 9960-W-14655 Y d. 9960-X-25982 16466: The abandoned lighthouse at Cape Henry is a(n) __________.
Y a. gray, pyramidal tower N b. mound of broken rubble N c. octagonal, black and white tower N d. black, skeleton structure 16466: The abandoned lighthouse at Cape Henry is a(n) __________.
Y a. gray, pyramidal tower N b. mound of broken rubble N c. octagonal, black and white tower N d. black, skeleton structure 16709: The coastline between Point Judith and Watch Hill is __________.
N a. steep with rocky bluffs N b. low and marshy Y c. sandy and broken by rocky points N d. heavily forested 16711: At what time will you cross the 60 foot curve if you make good 12 knots?
Y a. 0528 N b. 0534 N c. 0541 N d. 0544 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