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.
63: In addition to the Army Corps. of Engineers maps, data on bridge clearances may be found in the __________.
Y a. Light List N b. Waterways Journal N c. Army Corps. of Engineers Regulations N d. Channel Report 204: From your 1800 position you steer a course of 350°psc at a speed of 10.0 knots. At 1830, your position is LAT 41°11.7'N, LONG 71°45.8'W. What are the set and drift of the current?
Y a. 029°T, 1.4 knot N b. 029°T, 0.7 knots N c. 209°T, 0.7 knot N d. 209°T, 1.4 knots 212: If you were to head into Fishers Island Sound, which of the following charts would you switch to for better detail of Mystic and Mystic Harbor?
N a. 13209 N b. 13212 Y c. 13214 N d. 13215 258: During twilight on 28 December , about 1800 GMT, in DR position LAT 4°00'N, LONG 0°06'W, the sextant altitude (hs) of Venus was 30°46.8'. The height of eye was 36 feet, and the index error was 2.0' on the arc. The temperature was 68°F. The barometer read 1030 mb. Calculate the observed altitude (Ho).
N a. Ho 30°35.2' N b. Ho 30°37.1' Y c. Ho 30°38.1' N d. Ho 30°40.3' 269: 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. 099° Y b. 095° N c. 068° N d. 064° 363: 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 N c. Thimble Shoal Main Channel Y d. The South Auxiliary Channel 369: At 0812, you obtain the following radar information:
Cape Henry Light bearing 284°true @ 3.8 nm
What is your 0812 position?
N a. LAT 36°53.7'N, LONG 75°56.0'W N b. LAT 36°53.8'N, LONG 75°56.1'W Y c. LAT 36°54.6'N, LONG 75°55.8'W N d. LAT 36°55.2'N, LONG 75°55.4'W 396: A vessel at LAT 10°22.0'S, LONG 7°18.0'E, heads for a destination at LAT 6°52.0'N, LONG 57°23.0'W. Determine the true course and distance by Mercator sailing.
N a. 285°T, 3825.3 miles Y b. 285°T, 4025.7 miles N c. 296°T, 3825.3 miles N d. 296°T, 4025.7 miles 410: A vessel steams 666 miles on course 135°T from LAT 40°24.0'N, LONG 74°30.0'W. What is the latitude and longitude of the point of arrival by Mercator sailing?
N a. LAT 32°30.0'N, LONG 64°41.0'W Y b. LAT 32°33.0'N, LONG 64°46.0'W N c. LAT 32°36.0'N, LONG 64°49.0'W N d. LAT 32°39.0'N, LONG 64°53.0'W 478: The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial course is 300.9°T. Determine the latitude of the vertex.
N a. 46°54.8'N N b. 47°24.7'N N c. 47°35.2'N Y d. 47°40.5'N 517: At 0520, you take the following observations:
Point Judith Light 032°pgc
Point Judith Harbor of Refuge
Main Breakwater Center Light 308°pgc
What is the position of your 0520 fix?
Y a. LAT 41°20.8'N, Long 71°29.7'W N b. LAT 41°20.6'N, Long 71°30.4'W N c. LAT 41°20.6'N, Long 71°30.0'W N d. LAT 41°20.5'N, Long 71°29.4'W 545: At 0645, Watch Hill Point (left tangent) bears 314.5°T at 2.75 miles. What was the speed made good between 0600 and 0645?
N a. 11.4 knots Y b. 10.7 knots N c. 9.8 knots N d. 8.1 knots 606: At 0915 zone time, on 11 May , you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 19.5 knots. The distance is 4,276 miles. What is your estimated zone time of arrival at Seattle?
Y a. 1932, 19 May N b. 0332, 20 May N c. 1032, 20 May N d. 1232, 20 May 743: On 7 March , at 1838 ZT, in DR position LAT 34°26.9'N, LONG 58°16.2'W, you observe Polaris for latitude. The sextant altitude (hs) is 35°08.4'. The index error is 2.5' off the arc. The height of eye is 54 feet. What is the latitude at the time of the sight?
N a. 34°29.8'N Y b. 34°33.4'N N c. 34°34.8'N N d. 34°36.8'N 1118: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
Y a. 1190 X 75 feet N b. 1185 X 84 feet N c. 1190 X 84 feet N d. 1185 X 75 feet 1131: At 1923, you increase speed to make good 9.2 mph. What is the first Gage you will pass after your speed change?
N a. Cottonwood Point Y b. Caruthersville N c. Fulton N d. New Madrid 1149: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light?
N a. Green triangle Y b. Green diamond N c. Green square N d. Red-and-green banded square 1204: On 25 April , your 0930 zone time position is LAT 28°35'S, LONG 82°30'W. Your vessel is on course 300°T at a speed of 20.0 knots. Determine the time of LAN.
Y a. 1131 N b. 1158 N c. 1211 N d. 1225 1212: It is 21 November and you are keeping zone time +8. You are on course 082°T, speed 19 knots. Your 0830 DR position is LAT 24°14.8'N, LONG 133°35.5'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 35m 02s N b. 13h 03m 20s N c. 12h 35m 59s Y d. 12h 34m 51s 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 1275: At 1730 zone time, on 3 March , your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 knots. What is the zone time of sunset?
N a. 1829 N b. 1834 Y c. 1843 N d. 1852 1665: On 11 January , your vessel's 0655 zone time DR position is LAT 24°30'N, LONG 122°02'W, when an amplitude of the Sun is observed. The Sun's center is on the celestial horizon and bears 101.0° per standard compass. Variation in the area is 11.6°E. The chronometer reads 02h 52m 48s and is 02m 12s slow. What is the deviation of the standard compass?
Y a. 1.4°E N b. 1.4°W N c. 4.6°E N d. 4.6°W 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 1709: A stretch where the channel changes from one side of the river to the other is called a __________.
N a. bifurcation N b. transit Y c. crossing N d. changeover 1737: At 1227, on 19 October, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 1045 the following day?
N a. 5.2 mph N b. 5.6 mph Y c. 5.9 mph N d. 6.3 mph 2392: Which company does NOT have a marine facility in Rosedale harbor (mile 585 AHP)?
N a. Sanders Elevator Corp N b. Rosedale-Boliver County Port Commission Y c. T.L. James N d. Cives Steel Company 2532: At 0715, on March 9, you pass Knox Landing GagE C313.8 AHP) and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you increase speed to turn for 10 mph?
N a. 0640, 11 March N b. 0554, 12 March Y c. 0943, 13 March N d. 1242, 13 March 2893: You are steaming on a course of 253°T at 14 knots. At 2329 you observe a lighthouse bearing 282°T. At 2345 the lighthouse bears 300°T. What is your distance off at the second bearing?
N a. 3.7 miles N b. 4.3 miles N c. 5.2 miles Y d. 5.9 miles 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 3251: You have steamed 916 miles at 13 knots, and consumed 166 tons of fuel. If you have 203 tons of usable fuel remaining, how far can you steam at 14 knots?
N a. 757 miles N b. 841 miles Y c. 966 miles N d. 1108 miles 3640: You desire to make good a true course of 223°. The variation is 2°E, magnetic compass deviation is 2°E, and gyrocompass error is 1°W. An east-southeast wind produces 3° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 213°psc Y b. 216°psc N c. 220°psc N d. 223°psc 4015: 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 true heading of 319°.
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°
N a. 0.5°E N b. 1.0°W Y c. 2.5°E N d. 2.5°W 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 10610: At 1645 your GPS position is LAT 41°04.9' N, LONG 72°42.1'W. You are on course 072° per standard magnetic compass at a speed of 14 knots. At 1727 another GPS fix places your vessel 1 mile due north of Twenty-Eight Foot Shoal Lighted Buoy TE. What were your set and drift?
N a. 032°T at 1.2 knot Y b. 026°T at 1.1 knot N c. 207°T at 0.9 knot N d. 212°T at 1.2 knots 10706: At 0726 you depart Lake Montauk with light 1 close aboard and set course 310.5° per standard magnetic compass at 7.6 knots. At 0812 your GPS position is LAT 41°08.1'N, LONG 72°03.7'W. What is the current?
N a. 151°T at 1.0 knot N b. 164°T at 0.7 knot Y c. 334°T at 1.4 knot N d. 321°T at 0.8 knot 12506: You are on course 203° per standard magnetic compass when you take the following bearings: New Point Comfort Spit Light 2 267°psc Horn Harbor Entrance Light HH 304°psc Wolf Trap Light 006°psc What is the position of the fix?
N a. LAT 37°18.9'N, LONG 76°10.4'W Y b. LAT 37°18.8'N, LONG 76°10.8'W N c. LAT 37°18.7'N, LONG 76°11.1'W N d. LAT 37°18.5'N, LONG 76°10.7'W 12902: Your 1312 position is LAT 37°10.9'N, LONG 75°29.6'W. You are turning for 8.3 knots. What is your ETA at LAT 37°21.9'N, LONG 75°42.6'W?
N a. 1449 N b. 1456 Y c. 1502 N d. 1511 13505: What soundings are indicated by a blue tint on this chart?
N a. 30 fathoms or more Y b. 30 feet or less N c. 30 feet or more N d. 30 fathoms or less 15023: At 1042, 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 Y c. 0.8 mph N d. 1.2 mph 15046: As you pass through the Chesapeake Bay Bridge and Tunnel,
you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316°
pgc and 329°psc. What is the deviation on that heading?
N a. 3°E N b. 1°E Y c. 1°W N d. 9°W 15119: What is the height above water of Davis Creek Channel Light "1"?
N a. 6 feet (1.8 meters) Y b. 15 feet (4.6 meters) N c. 17 feet (5.2 meters) N d. 24 feet (7.3 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 15339: If there is no set or drift, at what time would you be abeam of Bartlett Reef Light?
N a. 1719 Y b. 1724 N c. 1729 N d. 1734 15445: As you proceed up York Spit Channel, what are the three base courses that you must steer to conform to the channel,
if steering by standard magnetic compass?
N a. 337.5°, 359.5°, 028.0° N b. 337.5°, 357.5°, 026.0° N c. 324.0°, 352.5°, 009.5° Y d. 340.0°, 000.5°, 025.0° 15665: Which action should you take to compensate for the above current?
N a. Continue on the same course and speed. Y b. Alter your course to the left. N c. Slow to 8.5 knots. N d. Alter your course to the right. 15860: At 0100, your position is LAT 41°05.3 N, LONG 72°29.2 W. You head for the position one mile north of Mattituck Inlet Light and turn to make good 9.0 knots. If the visibility is about 2 miles, at what approximate time will you sight the light?
N a. The light is visible at 0100 N b. 0109 Y c. 0120 N d. 0128 15910: At 0802, Branford Reef Light bears 348°T at 0.75 mile,
and the north point of Falkner Island bears 088°T at 6.7 miles. What were the set and drift since 0740?
N a. Set 040°T, drift .3 knot Y b. Set 220°T, drift .9 knot N c. Set 220°T, drift .3 knot N d. You are making good your intended course and speed. 16566: If you were to head into New London Harbor, which chart should you switch to for the best detail?
N a. 13209 N b. 13212 Y c. 13213 N d. 13214