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.
141: Your vessel is making turns for 9.5 mph and you estimate the average current for the trip will be 2.5 mph. What will be your ETA Donaldsonville, LA?
Y a. 1222 on 7 October N b. 1823 on 7 October N c. 0443 on 8 October N d. 1033 on 8 October 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 184: At 1930, your position is LAT 37°16.7'N, LONG 75°37.7'W. The depth of water is approximately __________.
N a. 40 feet (12.2 meters) Y b. 50 feet (15.2 meters) N c. 60 feet (18.3 meters) N d. 70 feet (23.2 meters) 217: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water under the keel is about __________.
N a. 59 feet (17.3 meters) N b. 52 feet (15.8 meters) N c. 45 feet (13.6 meters) Y d. 38 feet (11.5 meters) 279: At 1752, your position is LAT 37°04.3'N, LONG 76°06.4'W. On a flood current you should expect to be set to the __________.
N a. south southeast N b. south southwest N c. east southeast Y d. north northwest 302: A vessel steams 720 miles on course 058°T from LAT 30°06.0'S, LONG 31°42.0'E. What are the latitude and longitude of the point of arrival by mid-latitude sailing?
N a. LAT 23°48'S, LONG 43°11'E Y b. LAT 23°44'S, LONG 43°07'E N c. LAT 23°38'S, LONG 43°03'E N d. LAT 23°34'S, LONG 43°00'E 366: At 0731, approximately how much water is under your keel?
N a. 26 feet (7.9 meters) Y b. 31 feet (9.4 meters) N c. 48 feet (14.5 meters) N d. 54 feet (16.4 meters) 384: What is the course per standard magnetic compass between points "A" and "B"?
N a. 099.5° Y b. 098.5° N c. 095.5° N d. 094.5° 474: You are on a great circle track departing from LAT 25°50.0'N, LONG 77°00.0'W and your initial course is 061.7°T. The position of the vertex is LAT 37°35.6'N, LONG 25°57.8'W.
What is the distance along the great circle track between the point of departure and the vertex?
N a. 2735.1 miles Y b. 2664.9 miles N c. 2583.2 miles N d. 2420.0 miles 475: 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 latitude of the vertex.
N a. 44°29.1'S Y b. 45°30.9'S N c. 46°18.2'S N d. 43°41.8'S 493: At 0815, Montauk Pt. Light House is bearing 167°T, Shagwong Pt. has a radar range of 4.5 miles, and Cerberus Shoal "9" Buoy is bearing 284°T. If the engine is making turns for 10 knots, what was the set and drift of the current since 0748?
N a. Set 065°T, drift 1.1 knots N b. Set 065°T, drift 2.4 knots Y c. Set 245°T, drift 2.4 knots N d. Set 245°T, drift 1.1 knots 504: At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?
N a. _ . N b. _ _ N c. . . Y d. . _ 519: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?
N a. 227°psc N b. 233°psc N c. 258°psc Y d. 262°psc 730: On 18 November , your 1750 zone time DR position is LONG 110°16.0'W. At that time you observe Polaris with a sextant altitude (hs) of 21°29.8'. The chronometer time of the sight is 00h 52m 43s, and the chronometer error is 02m 18s fast. The index error is 3.2' on the arc, and the height of eye is 49.5 feet. What is your latitude by Polaris?
Y a. 21°03.4'N N b. 21°13.4'N N c. 21°28.1'N N d. 21°35.1'N 814: On 1 July , your 0515 zone time fix gives you a position of LAT 23°24.0'S, LONG 151°42.0'W. Your vessel is on course 240°T, and your speed is 10.0 knots. Local apparent noon (LAN) occurs at 1215 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 42°55.0'. What is the latitude at 1200 ZT?
N a. 24°02.5'S N b. 24°01.0'S Y c. 23°59.7'S N d. 23°58.6'S 1001: On 26 July , your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1228 50°23.5' N 19°21.9' 88°14.3'
1236 52°23.5' N 19°21.8' 88°29.0'
N a. LAT 18°00.9'N, LONG 51°31.9'W N b. LAT 18°03.5'N, LONG 51°36.2'W Y c. LAT 18°07.2'N, LONG 51°30.4'W N d. LAT 18°10.6'N, LONG 51°25.1'W 1107: On 16 April , your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 17°54.9'S, LONG 167°48.7'E N b. LAT 17°55.6'S, LONG 167°45.1'E N c. LAT 17°56.8'S, LONG 167°52.4'E Y d. LAT 18°00.4'S, LONG 167°49.2'E 1214: It is 25 February and you are keeping zone time +4. You are on course 283°T, speed 22 knots. Your 0900 DR position is LAT 29°10.3'N, LONG 72°04.9'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 08m 56s Y b. 13h 08m 02s N c. 12h 41m 36s N d. 12h 07m 56s 1238: 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 Y b. 47.2 feet N c. 49.6 feet N d. 57.5 feet 1454: On 4 October , your 0734 zone time DR position is LAT 24°11.0'N, LONG 162°34.0'E. At that time, you observe the Sun bearing 105.5°psc. The chronometer reads 08h 36m 11s, and the chronometer error is 01m 46s fast. The variation is 7°W. What is the deviation of the standard compass?
N a. 1.2°W N b. 1.9°E N c. 5.3°W Y d. 5.8°E 1684: You are passing Putney Lt. (mile 943.6 AHP). The gray shaded areas alongside the river represent __________.
N a. levees N b. weirs N c. dikes Y d. revetments 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 1720: As you approach mile 427.6 AHP, you see on the right side a white buoy with orange bands and open face diamond. This buoy shows __________.
N a. safe water N b. preferred channel Y c. danger N d. special marks 1806: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. U.S.C.G. Light List Y b. U.S.C.G. Local Notice to Mariners N c. Army Corps. of Engineers Navigation Chart N d. List of Buoys and Daymarks 2030: Which of the following statements regarding buoys on the Mississippi River is TRUE?
Y a. Buoys should be given as wide a berth as possible in passing. N b. Buoy positions on the chart are exact. N c. The buoys are maintained on station year round. N d. The buoys do not shift positions due to permanent moorings. 2076: What is the mile point of the Fulton Gage?
Y a. 778 AHP N b. 687 AHP N c. 632 AHP N d. 598 AHP 2459: You have steamed 432 miles at 18 knots and burning 406 barrels of fuel per day. You must decrease your consumption to 221 barrels per day with 190 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 10.6 N b. 12.8 Y c. 16.5 N d. 17.7 2669: You are steering 143°T, and a light is picked up dead ahead at a distance of 18.2 miles at 2006. You change course to pass the light 5.5 miles off abeam to port. If you are making 14.5 knots, what is your ETA at a position 5.5 miles off the light?
N a. 2115 Y b. 2118 N c. 2121 N d. 2124 2677: You sight a light 9° on your starboard bow at a distance of 21 miles. Assuming you make good your course, what will be your distance off the light when abeam?
Y a. 3.3 miles N b. 3.7 miles N c. 4.0 miles N d. 4.3 miles 2699: You are underway on course 137°T at a speed of 16.2 knots. You sight a rock bearing 134°T at a radar range of 4.6 miles at 1508. If you change course at 1514, what is the course to steer to leave the rock abeam to port at 1.5 miles?
Y a. 162°T N b. 158°T N c. 154°T N d. 151°T 2862: Your are on course 317°T at 13 knots. A light is bearing 22.5° relative at 0640. At 0659 the same light is bearing 45° relative. At what time should the light be abeam?
N a. 0709 Y b. 0712 N c. 0718 N d. 0721 2913: You are turning for 7.5 mph and estimate the current at 3.0 mph. What is your ETA at the River Cement Co. in Natchez considering that you passed Cherokee Landing Lt. at 2100?
Y a. 1605 on 15 January N b. 0355 on 16 January N c. 1244 on 16 January N d. 1922 on 16 January 3087: If the pitch of the propeller is 20.6 feet, and the revolutions per day are 107,341, calculate the day's run allowing 3% positive slip.
Y a. 352.7 miles N b. 363.6 miles N c. 374.5 miles N d. 389.1 miles 3631: You desire to make good a true course of 329°. The variation is 13° W, magnetic compass deviation is 4°E, and gyrocompass error is 2°W. A southerly wind produces a 1° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 319°psc N b. 321°psc Y c. 337°psc N d. 339°psc 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° 10508: 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 37°00.5'N, LONG 75°37.0'W. What was the set and drift?
N a. 010° at 0.5 knot N b. 017° at 1.0 knot N c. 020° at 0.4 knot Y d. 032° at 0.9 knot 10607: At 0912 your GPS position is LAT 41°04.9'N, LONG 72°42.1'W. You are on course 085° per standard magnetic compass at a speed of 6 knots. At 1052 your GPS position is 0.5 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift?
N a. 145°T at 1.2 knots N b. 148°T at 0.9 knot N c. 320°T at 1.3 knots Y d. 325°T at 0.7 knot 12306: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 093° per standard magnetic compass. If your vessel was heading 185° per standard magnetic compass at the time, which of the following is TRUE?
N a. The compass error is 2°W. N b. The deviation is 17°W. N c. The deviation is 2°W for all bearings of 093°. Y d. The deviation table is correct for that heading. 12501: You are on course 056° per standard magnetic compass when you take the following bearings: Cape Henry Light 262°psc Cape Charles Light 344°psc Chesapeake Light 125°psc What is your position?
N a. LAT 36°58.4'N, LONG 75°49.1'W N b. LAT 36°58.1'N, LONG 75°50.0'W N c. LAT 36°57.8'N, LONG 75°49.2'W Y d. LAT 36°57.6'N, LONG 75°49.8'W 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 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 13307: The soundings on the chart are based on the depth of water available at __________.
N a. mean low water Y b. mean lower low water N c. mean high water N d. mean high water springs 14304: What is a characteristic of light No. "41" on the Columbia River above Bonneville Lock?
N a. The light shows an isophase characteristic. N b. The light is 3 meters above the water. Y c. The light is equipped with a radar reflector. N d. The light is red in color. 15039: At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206° true and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?
N a. 0750 N b. 0754 Y c. 0758 N d. 0802 15269: New London Harbor is __________.
Y a. limited to vessels drawing less than 36 feet (10.8 meters) N b. closed during the winter season N c. subject to dangerous freshets in the fall N d. difficult to enter at night 15429: What is the vertical clearance of the Vicksburg Highway 80 Bridge when the river level is the same as the Low Water Reference Plane? The low water reference plane (LWRP) for Vicksburg, MS. is 0.1.
N a. 128.3 ft N b. 125.6 ft N c. 119.5 ft Y d. 116.1 ft 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 15712: At 0910, your DR position is LAT 41°11.9'N, LONG 72°47.8'
W. Your vessel is on course 097°T at 9.5 knots, and the weather is foggy. At 0915, Branford Reef Light is sighted through a break in the fog bearing 318°T. At 0945,
Falkner Island Light is sighted bearing 042°T. What is your 0945 running fix position?
N a. LAT 41°11.1'N, LONG 72°41.2'W N b. LAT 41°11.3'N, LONG 72°41.3'W N c. LAT 41°11.4'N, LONG 72°41.0'W Y d. LAT 41°11.5'N, LONG 72°40.7'W 16238: At 2045, buoy "GM" is at a range of 6.45 miles. Hogsland buoy "12" is at a range of 5.25 miles.
Your vessel's position is __________.
N a. LAT 37°22.8'N, LONG 75°30.8'W Y b. LAT 37°22.3'N, LONG 75°31.7'W N c. LAT 37°22.0'N, LONG 75°29.3'W N d. LAT 37°21.8'N, LONG 75°30.7'W 16265: At 0600, you are on course 241°psc at 6.5 knots. Chesapeake Light bears 153° per standard magnetic compass,
and Cape Henry Light bears 261° per standard magnetic compass. What is the position of your 0600 fix?
N a. LAT 36°59.0'N, LONG 75°47.4'W Y b. LAT 36°59.3'N, LONG 75°47.7'W N c. LAT 36°59.5'N, LONG 75°47.8' N d. LAT 36°59.3'N, LONG 75°48.0' 16307: Which statement regarding the wreck 0.2 mile south of buoys "1" and "2" at the entrance to New London Harbor is TRUE?
N a. The wreck presents a danger to all vessels with drafts in excess of 30 feet (9.1 meters). N b. The wreck is visible above the sounding datum between the months of March and June. Y c. The wreck is shown on the chart, but its actual existence is doubtful. N d. The wreck was cleared by wire drag in 1982 and will not appear on future charts. 16519: As you head toward Great Salt Pond, visibility is unlimited. At what time will you lose sight of Montauk Pt.
Light?
N a. 0905 N b. 0928 N c. 0950 Y d. It will remain visible to Great Salt Pond. 16613: At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at 1.2 knots?
N a. 132° Y b. 129° N c. 120° N d. 118°