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.
94: You have orders to drop off the empties at the fleeting area in Cairo and add five loaded barges to your tow. If you are turning for 8 mph and estimate the current at 0.5 mph, what is your ETA at Cairo?
N a. 1928, 11 Aug Y b. 1614, 11 Aug N c. 1327, 11 Aug N d. 2352, 10 Aug 120: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 5.5 mph Y b. 6.0 mph N c. 8.0 mph N d. 11.0 mph 126: What is your clearance as you pass under the Vicksburg Highway 80 Bridge (mile 437.8 AHP). if the Vicksburg Gage reads 14.8 feet and the highest point on your tow boat is 44.5 feet?
N a. 36 feet N b. 42 feet Y c. 57 feet N d. 66 feet 256: At 0209, your position is LAT 41°01.8'N, LONG 72°40.8'W. What course should you steer per standard magnetic compass to make good 278° magnetic? (assume no set and drift)
N a. 262.0°psc N b. 265.0°psc N c. 270.5°psc Y d. 275.5°psc 259: The south coast of Long Island Sound between Mattituck Inlet and Port Jefferson is __________.
N a. composed of high rocky bluffs N b. a high, flat plateau with sheer cliffs N c. low and marshy with isolated beaches Y d. fringed by rocky shoals 443: At 1104, Watch Hill Point Light is in line with Stonington Outer Breakwater Light, the range to the south tip of Watch Hill Point is 2.6 miles and the range to the beach is 1.9 miles. You are steering to make good 075°T, speed 10.0 knots. At 1110, you change course to head for a position of LAT 41°05.0'N, LONG 71°50.0'W. What is the true course?
N a. 193° Y b. 190° N c. 187° N d. 185° 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. . _ 510: You observe the star Deneb at a sextant altitude (hs) of 48°34.8' on 16 December . The index error is 4.0' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)?
N a. 48°02.9' Y b. 48°30.5' N c. 48°31.4' N d. 48°46.5' 745: On 13 October , at 1847 ZT, your vessel's DR position is LAT 42°17.4'N, LONG 138°46.2'W. At approximately this time, you obtain a sextant altitude (hs) of Polaris reading 42°16.8', with an index error of 3.2' on the arc. Your chronometer reads 03h 45m 20s and is 1m 32s slow. What is your latitude by Polaris, given a height of eye of 44 feet?
Y a. 42°09.1'N N b. 42°12.5'N N c. 42°16.0'N N d. 42°19.5'N 750: On 28 October , at 1754 ZT, your vessel's DR position is LAT 28°30'N, LONG 63°24'W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28°42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?
N a. 28°25.2'N N b. 28°30.6'N Y c. 28°34.9'N N d. 28°41.3'N 1084: On 4 Dec. , your 1500 ZT DR position is LAT 18°06.0'N, LONG 75°42.0'W. You are on course 020°T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1548 running fix.
N a. LAT 18°10.3'N, LONG 75°34.5'W N b. LAT 18°12.6'N, LONG 75°42.0'W N c. LAT 18°14.0'N, LONG 75°40.0'W Y d. LAT 18°17.3'N, LONG 75°37.7'W 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 1244: If your vessel is making turns for 7.5 mph with an estimated average current of 1.5 mph, what is your ETA at the dock in Angelina, LA?
Y a. 1621, 28 Dec N b. 2203, 28 Dec N c. 0516, 29 Dec N d. 1621, 29 Dec 1253: On 8 August , your 0400 ZT DR position is LAT 23°16.0'S, LONG 105°33.0'W. You are on course 295°T at a speed of 25 knots. What will be the zone time of sunrise at your vessel?
N a. 0623 N b. 0629 Y c. 0636 N d. 0654 1461: On 27 June , your 0734 zone time DR position is LAT 22°14.0'N, LONG 53°52.0'W. At that time, you observe the Sun bearing 069.5°psc. The chronometer reads 11h 32m 51s and the chronometer error is 01m 26s slow. The variation is 5°E. What is the deviation of the standard magnetic compass?
Y a. 1.6°E N b. 2.9 W N c. 2.9°E N d. 3.2°E 1642: From your 2129 position you reduce engine speed to 14 knots. What is the course to make good from your 2129 position to arrive 0.3 mile north of Lighted Whistle Buoy "NCA" (LL#375) assuming no set and drift?
N a. 216°T N b. 219°T Y c. 222°T N d. 225°T 1721: What is the total length of the trip?
Y a. 850.6 miles N b. 894.8miles N c. 922.5 miles N d. 946.5 miles 1733: What are the dimensions of the channel maintained at Baton Rouge, LA?
N a. 30 feet x 300 feet N b. 40 feet x 300 feet Y c. 45 feet x 500 feet N d. 30 feet x 500 feet 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 1871: On 12 June , your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 270°T at a sextant altitude (hs) of 65°41.7'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
N a. Epsilon Leonis N b. Scheat N c. Merak Y d. Algeiba 1928: On 17 March , your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. At this time you observe an unidentified star bearing 270°T with an observed altitude of 46°30.2'. The chronometer reads 08h 22m 15s, and is 01m 45s fast. What star did you observe?
N a. Altair N b. Alkaid Y c. Arcturus N d. Deneb 2910: Your vessel is steaming on a course of 140°T at 15 knots. At 1530 a lighthouse bears 200°T. At 1550 it bears 249°T. What is your distance from the lighthouse at 1550?
N a. 1.15 miles N b. 4.60 miles N c. 5.45 miles Y d. 5.75 miles 3058: The propeller on a vessel has a diameter of 20.9 feet and a pitch of 19.6 feet. What would be the apparent slip if the vessel cruised 447 miles in a 23 hour day (observed distance) at an average RPM of 108?
N a. -5.6% N b. +5.6% N c. -7.0% Y d. +7.0% 3077: If the speed necessary for reaching port at a designated time is 23.7 knots and the pitch of the propeller is 20.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 7% negative slip?
Y a. 108 N b. 112 N c. 116 N d. 124 3103: You are turning 93 RPM, with a propeller pitch of 25 feet, and an estimated slip of 0%. What is the speed of advance?
N a. 20.2 knots N b. 21.9 knots N c. 22.4 knots Y d. 22.9 knots 3111: You are turning 100 RPM, with propeller pitch of 25 feet, and an estimated negative slip of 5%. What is the speed of advance?
N a. 23.4 knots N b. 24.7 knots Y c. 25.9 knots N d. 26.3 knots 3297: Your vessel consumes 236 barrels of fuel per day at a speed of 16.5 knots. What will be the fuel consumption of your vessel at 13.0 knots?
N a. 102 bbls Y b. 115 bbls N c. 147 bbls N d. 186 bbls 3623: Your vessel is steering course 166°psc, variation for the area is 8°W, and deviation is 3°W. The wind is from the west-southwest, producing a 2° leeway. What true course are you making good?
Y a. 153°T N b. 157°T N c. 175°T N d. 179°T 3634: You desire to make good a true course of 038°. The variation is 5°E, magnetic compass deviation is 4°W, and gyrocompass error is 4°W. A southeasterly wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 033°psc Y b. 041°psc N c. 043°psc N d. 047°psc 3644: While enroute from Cape Town to Rio a vessel's course is 281°pgc. The variation for the locality is 24°W. The deviation is 4°E. The gyro error is 2°W. What is the true course made good?
Y a. 279°T N b. 261°T N c. 301°T N d. 283°T 3758: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 212°T, and the variation is 7°W. If the heading of your vessel at the time of the sighting is 208° per standard magnetic compass, what is the correct deviation?
N a. 4°E N b. 4°W Y c. 11°E N d. 11°W 4012: 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 magnetic compass heading of 210°.
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. 0.0° N b. 0.5°W N c. 0.5°E N d. 1.0°E 10210: Your present position is LAT 41°07.4'N, LONG 72°44.0'W. Assuming that there is no set and drift, what course must you steer per standard magnetic compass (psc) to a position of LAT 41°08.5'N, LONG 72°28.8'W?
N a. 073°psc N b. 084°psc N c. 091°psc Y d. 097°psc 10600: At 1620 your GPS indicates a position of LAT 41°09.0'N, LONG 72°40.0'W. You are on course 134° per standard magnetic compass at a speed of 10 knots. At 1700 your GPS indicates your position as LAT 41°05.3'N, LONG 72°33.7'W. What were the set and drift?
N a. 067°T at 1.7 knots N b. 078°T at 1.1 knots N c. 243°T at 1.0 knot Y d. 249°T at 1.6 knots 10704: At 2038 your position is LAT 41°09.2'N, LONG 71°40.6'W. You are on course 301° per standard magnetic compass at 7.2 knots. At 2152 your position is LAT 41°11.3'N, LONG 71°48.6'W. What were the set and drift?
N a. 080°T at 1.0 knot Y b. 096°T at 2.0 knots N c. 261°T at 1.2 knots N d. 277°T at 0.9 knot 11301: At 1256 your GPS position is LAT 36°57.0'N, LONG 75°41.0'W. At 1331 your position is LAT 37°07.5'N, LONG 75°39.1'W. What was the speed made good between the fixes?
N a. 14.6 knots N b. 15.2 knots N c. 16.6 knots Y d. 18.3 knots 11306: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 1950 your position is LAT 36°59.5'N, LONG 75°37.0'W. What is the speed made good?
N a. 5.6 knots N b. 8.2 knots N c. 9.1 knots Y d. 10.9 knots 11808: What is the true course to steer from a position 2 miles due south of Branford Reef Light to Horton Pt. Light, if the set and drift of the current are 247°T at 3 knots, and a southwesterly wind will cause 3° of leeway? (Your engines are making turns for 10 knots.)
Y a. 104°T N b. 100°T N c. 095°T N d. 087°T 12602: You are on course 087° per standard magnetic compass (psc) when you take the following bearings: Falkner Island Light - 022.0°psc Horton Point Light - 111.5°psc Mt. Sinai Breakwater Light - 254.0°psc What is your position?
N a. LAT 41°13.6'N, LONG 72°46.6'W N b. LAT 41°10.5'N, LONG 72°40.5'W N c. LAT 41°07.0'N, LONG 72°44.5'W Y d. LAT 41°06.8'N, LONG 72°40.7'W 13706: What is the horizontal clearance of the navigation opening of Trestle B of the Chesapeake Bay Bridge and Tunnel?
N a. 21 feet Y b. 70 feet N c. 75 feet N d. 300 feet 15146: At 0016 your position is 41°10.3'N, 71°53.0'W. You are steering a course of 296° true with no set and drift. At 0049 Race Rock Light is on your starboard beam. What was your speed made good from your 0016 position?
N a. 13.8 knots N b. 14.4 knots N c. 15.0 knots Y d. 15.6 knots 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 15518: From your 1930 position, you plot a course to pass 0.5 mile due south of Race Rock Light. If your vessel's speed is 10.0 knots, the current's set and drift are 040°T at 1.8 knots, and a north wind produces a 3° leeway, what true course should you steer to make good your desired course?
N a. 275°T Y b. 280°T N c. 290°T N d. 294°T 15959: What is the average velocity of the maximum ebb current in the channel west of Middle Ground?
N a. 0.8 knot N b. 1.0 knot Y c. 1.3 knots N d. 1.6 knots 15962: Based on dead reckoning, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone N b. depart a restricted area N c. cross a submerged pipeline Y d. depart a regulated area 16338: At 2209 your position is latitude 40 47.7'N, longitude 71 35.5'W. There is a strong WSW'ly wind causing an estimated 3° leeway. What course will you steer by standard magnetic compass from your 2209 position to make good 340°T?
N a. 322° N b. 348° Y c. 356° N d. 002° 16563: From your 1850 fix, you come left to a course of 280°T,
while maintaining a speed of 10 knots. Which combination of available Loran-C lines would be best for position determination?
Y a. 9960-Y and 9960-W N b. 9960-X and 9960-Y N c. 9960-W and 9960-X N d. All 3 combinations are equal. 16845: After the pilot boards, he tells you the gyro has a 2°E error. If this is true, what should the bearing be along Trestle C of the Chesapeake Bay Bridge-Tunnel as your vessel passes abeam of it?
N a. 052°pgc N b. 049°pgc Y c. 047°pgc N d. 045°pgc