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.
15: 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 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 288: According to your track line, how far off New Point Comfort Spit Light "4" will you be when abeam of this light?
N a. 0.5 mile Y b. 0.9 miles N c. 1.5 miles N d. 1.8 miles 374: You calculate that the current will be ebbing at the Race at 0700. You should expect to be set in which general direction at the Race?
N a. West Y b. East N c. Northeast N d. North 425: At 0730, your position is LAT 41°10.5'N, LONG 72°32.2'W. From this position you steer course 286°psc with an engine speed of 9.0 knots. What is the approximate depth of water under your keel?
N a. 67 feet (20.3 meters) N b. 62 feet (18.8 meters) N c. 57 feet (17.3 meters) Y d. 52 feet (15.8 meters) 459: Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W.
N a. 3341.0 miles, 063°T N b. 3347.0 miles, 063°T N c. 3427.8 miles, 061°T Y d. 3588.6 miles, 059°T 659: You are planning a voyage from LAT 48°30'N, LONG 125°00'W to Korea via LAT 48°30'N, LONG 153°00'E. Which of the following track lines would you select for the safest and most direct route? (Use gnomonic tracking chart WOXZC 5270)
N a. Parallel sailing along 48°30'N N b. Great circle track line between the two points Y c. Great circle to LAT 51°00'N, LONG 178°00'W, parallel sailing for 80 miles, then great circle to the via point N d. Rhumb line track between the two points 820: On 15 March , in DR position LAT 21°42.0'N, LONG 55°26.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 04h 02m 40s, and the chronometer error is 02m 24s fast. The sextant altitude (hs) is 66°15.6'. The index error is 2.8' on the arc, and your height of eye is 56 feet. What is the latitude at meridian transit?
N a. 21°12.0'N N b. 21°18.0'N N c. 21°24.4'N Y d. 21°32.0'N 831: On 30 March , in DR position LAT 20°26.2'N, LONG 131°17.9'E, you take an ex-meridian observation of the Moon's lower limb at upper transit. The chronometer time of the sight is 10h 36m 02s, and the chronometer error is 02m 06s slow. The sextant altitude (hs) is 48°21.4'. The index error is 2.0' on the arc, and your height of eye is 40 feet. What is the latitude at meridian transit?
N a. LAT 20°44.8'N Y b. LAT 20°31.9'N N c. LAT 20Z°23.7'N N d. LAT 20°15.6'N 839: On 22 August , in DR position LAT 29°41.8'N, LONG 33°15.5'W, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 08h 00m 02s, and the chronometer error is 02m 20s slow. The sextant altitude (hs) is 74°32.4'. The index error is 1.5' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?
N a. LAT 29°39.3'N N b. LAT 29°41.3'N Y c. LAT 29°47.8'N N d. LAT 29°49.7'N 1000: On 18 May , your 1030 ZT DR position is LAT 18°30'N, LONG 62°31'W. You are on course 286°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1204 61°54.6' N 19°37.6' 88°39.7'
1210 63°24.6' N 19°37.7' 88°59.2'
N a. LAT 18°33.6'N, LONG 62°54.3'W N b. LAT 18°35.2'N, LONG 62°49.7'W N c. LAT 18°38.7'N, LONG 62°59.2'W Y d. LAT 18°41.1'N, LONG 62°53.9'W 1098: On 19 September , your 0300 zone time DR position is LAT 24°35'N, LONG 88°40'W. You are on course 288°T at a speed of 14 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0028
N a. LAT 24°47.4'N, LONG 89°15.0'W Y b. LAT 24°52.5'N, LONG 89°22.4'W N c. LAT 24°59.5'N, LONG 89°28.6'W N d. LAT 25°06.0'N, LONG 90°37.0'W 1126: What are the dotted lines crossing at mile 529.7 AHP?
Y a. submarine cables N b. power cables N c. gated dams N d. workboat crossings 1146: The Linwood Bend revetment on the LMR extends from mile __________.
N a. 828.1-823.1 RDB N b. 831.7-829.4 RDB N c. 845.4-842.5 LDB Y d. 841.3-838.7 LDB 1165: Which of the following statements concerning the buoys on the Mississippi River is TRUE?
N a. The position of river buoys can be determined by consulting the latest Light List - Vol. V. N b. A preferred channel mark is a lateral mark indicating a channel junction which must always be passed to starboard. N c. Buoys should be passed as close as possible. Y d. Setting a buoy is the act of placing a buoy on assigned position in the water. 1211: It is 15 July and you are keeping +7 zone time. You are on course 095°, speed 16 knots. Your 0800 DR position is LAT 25°39.4'N, LONG 129°46.2'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 40m 17s Y b. 13h 38m 26s N c. 12h 42m 20s N d. 12h 38m 20s 1280: On 27 March , your 0330 zone time DR position is LAT 23°32'N, LONG 154°47'E. Your vessel is on a course of 105°T at a speed of 20 knots. What will be the zone time of sunrise at your vessel?
Y a. 0534 N b. 0557 N c. 0612 N d. 0624 1659: On 15 July , in DR position LAT 22°19.0'N, LONG 154°37.0'W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 298°psc. The chronometer reads 04h 45m 19s and is 01m 56s slow.
Variation in the area is 7.5°W. What is the deviation of the standard magnetic compass?
N a. 2.7°W Y b. 3.0°E N c. 3.6°W N d. 3.9°E 1703: At 1218, on 16 March, you are passing the Vicksburg Gage (mile 437.0 AHP). What has been the average current since 0630, 15 March, if you have been making turns for 8.0 mph?
N a. 0.2 mph N b. 0.5 mph N c. 0.8 mph Y d. 1.2 mph 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 2455: You are underway and intend to make good a course of 170°T. You experience a current with a set and drift of 050°T at 2.8 knots, and a easterly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 18.5 knots. What will be your speed made good over your intended course of 170°T?
N a. 18.5 knots N b. 18.1 knots N c. 17.6 knots Y d. 17.2 knots 2500: You are underway and intend to make good a course of 227°T. You experience a current with a set and drift of 350°T at 2.1 knots, and a northwest wind produces a leeway of 5°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 11 knots. What will be your speed made good over your intended course of 227°T?
N a. 18.5 knots N b. 18.1 knots N c. 17.6 knots Y d. 17.2 knots 2690: While on a course of 066°pgc, a light bears 13° on the port bow at a distance of 12.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to port?
N a. 067°pgc Y b. 072°pgc N c. 079°pgc N d. 085°pgc 2777: The Helena Gage reads 2.3 feet. The high point on your towboat is 26 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 76.0 feet N b. 84.2 feet N c. 89.5 feet Y d. 90.7 feet 2851: Your vessel is on a course of 297°T at 11 knots. At 0019 a light bears 274.5°T, and at 0048 the light bears 252°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0102, 2.6 miles Y b. 0108, 3.7 miles N c. 0057, 4.6 miles N d. 0117, 5.0 miles 3074: If the speed necessary for reaching port at a designated time is 19.2 knots and the pitch of the propeller is 22.7 feet, how many revolutions per minute will the shaft have to turn, assuming a 4% positive slip?
N a. 82 Y b. 89 N c. 96 N d. 103 3258: You have steamed 525 miles at 16.0 knots, and consumed 105 tons of fuel. If you have 308 tons of usable fuel remaining, how far can you steam at 19 knots?
N a. 920 miles Y b. 1092 miles N c. 1297 miles N d. 2172 miles 3295: Your vessel consumes 178 barrels of fuel per day at a speed of 13.5 knots. What will be the fuel consumption of your vessel at 15.0 knots?
N a. 172 bbls N b. 198 bbls N c. 219 bbls Y d. 244 bbls 3469: You are underway on course 315°T at 14 knots. The current is 135°T at 1.9 knots. What is the speed being made good?
Y a. 12.1 knots N b. 13.5 knots N c. 14.0 knots N d. 15.9 knots 3621: Your vessel is steering course 216° per standard magnetic compass, variation for the area is 9°W, and deviation is 2°E. The wind is from the east, producing a 5° leeway. What true course are you making good?
N a. 204°T Y b. 214°T N c. 223°T N d. 227°T 10305: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position one mile due south of Block Island Southeast Point Light?
N a. 070.0° N b. 076.5° Y c. 082.5° N d. 087.5° 10307: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position 0.5 mile due south of Race Rock Light?
Y a. 324°psc N b. 328°psc N c. 331°psc N d. 339°psc 10601: At 1645 your GPS position is LAT 41°09.2'N, LONG 72°36.9'W. You are steering course 262° per standard magnetic compass at a speed of 12 knots. At 1721 you fix your position by plotting several compass bearings on nearby known fixed objects. These result in a position of LAT 41°07.2'N, LONG 72°44.9'W. What were your set and drift?
N a. 040°T at 0.8 knot Y b. 030°T at 1.7 knots N c. 225°T at 0.9 knot N d. 242°T at 1.1 knots 10602: At 1815 your GPS position is LAT 41°09.2'N, LONG 72°36.9'W. You are steering course 285° per standard magnetic compass at a speed of 16 knots. At 1909 you fix your position by plotting several compass bearings on nearby known fixed objects. These result in a position of LAT 41°08.5'N, LONG 72°53.7'W. What were your set and drift?
N a. 292°T at 1.8 knots N b. 243°T at 1.0 knot N c. 118°T at 1.9 knots Y d. 111°T at 2.1 knots 10909: What will be the average direction of the current in Lynnhaven Roads at 1000 DST (ZD +4) on 23 July 1983?
N a. 305°T N b. 125°T N c. 070°T Y d. Almost slack water 15063: At 0830, you want the latest weather forecasts for the Falkner Island area. On what frequency do you set your FM radio for this information?
N a. 2182 kHz N b. 162.80 Mhz N c. 156.65 Mhz Y d. 162.55 Mhz 15158: At 1630, you reach point "A" and come right to 204°T. Your engine speed is 12 knots. Your 1715 position is LAT 37°09.8'N, LONG 75°37.4'W. The current was __________.
N a. 067°T at 1.1 knots Y b. 067°T at 1.5 knots N c. 247°T at 1.1 knots N d. 247°T at 1.6 knots 15165: At 2000, your position is LAT 37°04.1'N, LONG 76°05.6'W. You change course for the Eastern Shore. At 2037, Old Plantation Flats Light bears 033°pgc, and York Spit Light bears 282°pgc. The course made good from your 2000 position was __________.
Y a. 006°T N b. 014°T N c. 020°T N d. 028°T 15468: Which loran line of position will serve as a danger reading on the loran to keep you west of the submerged obstruction at LAT 37°24.2'N, LONG 76°03.7'W, after you leave York Spit Channel?
N a. Not less than 9960-Z-58622 N b. Not more than 9960-Y-41595 N c. Not less than 9960-Y-41595 Y d. Not less than 9960-X-27246 15661: At 0727, the cupola on Fishers Island is in line with Latimer Reef Light bearing 024°pgc. Based on this, the gyro error is __________.
N a. 2°E N b. 1°E N c. 0° Y d. 3°W 15670: Which chart should you use to enter Great Salt Pond?
N a. 13204 N b. 13205 N c. 13207 Y d. 13217 15708: Which structure should you look for while trying to locate Southwest Ledge Light?
N a. White conical tower with a brown band midway of height Y b. White octagonal house on a cylindrical pier N c. Conical tower, upper half white, lower half brown N d. Black skeleton tower on a granite dwelling 15763: At 0715, you take the following bearings:
Race Rock Light 324°pgc
Little Gull Island Light 245°pgc
Mt. Prospect Antenna 034°pgc
Based on your 0715 fix, which statement is TRUE?
N a. You are to the right of your track line. Y b. The charted depth is about 265 feet (80.3 meters). N c. You are in a cable area. N d. You are governed by the Inland Rules. 15807: You are southeast of Saybrook Breakwater Light passing Saybrook Bar Lighted Bell Buoy "8". This buoy marks __________.
Y a. shoal water N b. a tide rips area N c. the junction with the Connecticut River N d. a sunken wreck 15842: From your 2030 fix you change course to 195°T, and leave the engine speed at 14 knots.
At 2045, Your position is L 37° 13.50'N Long 075° 38.05' W
Which statement is TRUE?
Y a. Cape Charles Light bears 050° relative. N b. Chesapeake Light bears 190° relative. N c. Your fathometer reading is approximately 40 fathoms. N d. Your vessel is located in a restricted area. 15861: At 0125, Mattituck Inlet Light bears 203°pgc at 2.1 miles.
What is the approximate depth of the water under the keel?
N a. 46 fathoms (83.6 meters) N b. 44 fathoms (80.0 meters) N c. 43 feet (13.0 meters) Y d. 38 feet (11.5 meters) 15912: If there is no current, what is the course per standard magnetic compass from your 0802 fix to the position 1.1 miles north of Falkner Island Light?
N a. 064° N b. 068° Y c. 095° N d. 099° 15939: From your 1910 position, you set a course of 162°T at a speed of 14 knots. What will serve as a definite warning that you are being set towards Race Rock Light?
N a. Decreasing bearings to Race Rock Light Y b. Decreasing loran readings on loran rate 9960-W N c. Increasing soundings N d. Decreasing radar ranges to Race Point