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.
49: As you pass under the Greenville Highway Bridge, you estimate the current as 4.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph?
Y a. 13.5 mph N b. 14.5 mph N c. 15.5 mph N d. 16.5 mph 51: As you approach Anconia Pt. Light (mile 528.6 AHP), which type of dayboard would you see on the light structure?
N a. Green diamond Y b. Green square N c. Red square N d. Red diamond 66: At 2126, you pass Morganza Bend Light (mile 278.4 AHP). At 0122, 4 January, you pass Red River Landing Gage (302.4 AHP). You have been turning for 7.5 mph. What is the current?
N a. 6.2 mph N b. 2.7 mph N c. 1.8 mph Y d. 1.4 mph 125: As you approach Ashland Light (mile 378.1 AHP) which daymark would you see?
Y a. Red triangle N b. Red diamond N c. Green square N d. Green diamond 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) 314: At 1430, your position is LAT 37°12.8'N, LONG 76°17.7'W. At this time, you come left and steer 045°T. This course will lead you through a channel bordered by yellow buoys. The dashed magenta lines between the buoys mark __________.
N a. York River Entrance Channel Y b. Fish trap areas N c. the piloting channel for Mobjack Bay N d. New Point Comfort shoal area 323: At 2205, you are in Thimble Shoal North Auxiliary Channel abeam of lighted gong buoy "4". At this time the visibility decreases to 5 miles. You continue to turn RPMs for 6 knots and experience no set and drift. What time would you expect Old Point Comfort Light (white sector) to become visible?
N a. 2258 N b. 2246 Y c. 2240 N d. 2230 342: If the visibility is 11 miles, what is the earliest time you can expect to see New Haven Light?
N a. The light is visible at 0352. Y b. 0443 N c. 0414 N d. You will not sight the light. 391: A vessel at LAT 40°42.0'N, LONG 74°01.0'W, heads for a destination at LAT 14°41.0'N, LONG 17°26.0'W. Determine the true course and distance by Mercator sailing.
N a. 123°T, 3066.5 miles N b. 123°T, 3065.6 miles N c. 118°T, 3066.5 miles Y d. 118°T, 3365.0 miles 412: A vessel steams 1650 miles on course 077°T from LAT 12°47'N, LONG 45°10'E. What is the latitude and longitude of the point of arrival by Mercator sailing?
N a. LAT 18°54'N, LONG 72°58'E Y b. LAT 18°58'N, LONG 72°52'E N c. LAT 19°02'N, LONG 72°44'E N d. LAT 19°06'N, LONG 72°36'E 492: At 0748, you change course to 160°T. What loran reading can you follow to remain on this course?
N a. 9960-W-14660.0 Y b. 9960-W-14651.0 N c. 9960-Y-43943.8 N d. 9960-Y-43852.0 527: You depart LAT 25°54'N, LONG 9°38'E and steam 592 miles on course 270°. What is the longitude of arrival?
N a. 1°20'E N b. 0°40'E N c. 0°40'W Y d. 1°20'W 993: Your 0745 ZT, 15 July , position is LAT 29°04.0'N, LONG 71°17.5'W. You are on course 165°T, and your speed is 8.0 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix? NP-0003
Y a. LAT 28°35.0'N, LONG 71°08.5'W N b. LAT 28°39.8'N, LONG 71°04.0'W N c. LAT 28°40.5'N, LONG 71°13.0'W N d. LAT 28°43.3'N, LONG 71°02.5'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 1143: Which town is located at mile 663.5 AHP?
N a. Friers Point Y b. Helena N c. St. Francis N d. Rodney 1261: On 16 February , your 0300 ZT DR position is LAT 28°32.0'S, LONG 176°49.0'E. You are on course 082°T at a speed of 21 knots. What will be the zone time of sunrise at your vessel?
N a. 0534 Y b. 0552 N c. 0631 N d. 0645 1277: On 22 June , your 0400 zone time DR position is LAT 23°00'N, LONG 81°45'W. You are steaming on course 110°T at a speed of 8.6 knots. What will be the zone time of sunrise at your vessel?
N a. 0537 Y b. 0541 N c. 0545 N d. 0547 1462: On 17 June , your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?
N a. 0.7°W Y b. 3.5°W N c. 3.7°E N d. 2.3°E 1470: On 1 March , your 2135 zone time DR position is LAT 23°54.0'N, LONG 63°22.0'W. At that time, you observe Schedar bearing 328°psc. The chronometer reads 01h 35m 16s, and the chronometer error is 00m 07s slow. The variation is 3.5°E. What is the deviation of the standard compass?
N a. 2.3°E N b. 2.5°W Y c. 3.2°W N d. 4.2°E 1487: On 5 June , your 0420 zone time DR position is LAT 26°47.0'N, LONG 133°19.5'W. At that time, you observe Vega bearing 298.1°psc. The chronometer reads 01h 21m 17s, and the chronometer error is 02m 25s fast. The variation is 3.5°E. What is the deviation of the standard compass?
N a. 1.8°E N b. 5.2°E Y c. 1.8°W N d. 5.2°W 1750: In addition to the Army Corps. of Engineers maps, data on bridge clearances may be found in the __________.
N a. Army Corps. of Engineers Regulations Y b. Light List N c. Waterways Journal N d. Channel Report 1751: At 1118, on 24 May, you pass Natchez Gage and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at Cairo, IL if you continue to turn for 10 mph?
N a. 0840, 26 May N b. 2218, 26 May Y c. 2339, 27 May N d. 0339, 28 May 1831: You pass Warnicott Bar Lt. at 1146, 24 May. What is your ETA off the Mhoon Landing Gage if you average 6.5 mph?
N a. 0152, 26 May N b. 0426, 26 May Y c. 1528, 26 May N d. 0909, 27 May 1868: On 12 June , your 1945 DR position is LAT 21°47.0'N, LONG 46°52.0'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 130°T at a sextant altitude (hs) of 45°21.2'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 10h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
N a. Theta Carinae N b. Epsilon Leonis Y c. Beta Librae N d. Zeta Puppis 1874: On 2 October , your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 25°19.4' bearing 273°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?
N a. Alpha Serpentis Y b. Beta Librae N c. Beta Lupi N d. Epsilon Bootis 2060: The highest point on your towboat is 67 feet above the water, and the Helena Gage reads +22.3 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
Y a. 30.1 feet N b. 49.8 feet N c. 52.4 feet N d. 74.7 feet 2161: On 28 April , your vessel's 0515 zone time position is LAT 23°26'S, LONG 95°30'E. At this time, the observed altitude (Ho) of the star Rigil Kentaurus is 24°51.4'. Your chronometer reads 11h 16m 36s and is 01m 18s fast. What is the intercept (a) based on the assumed position method?
N a. 30.9 miles N b. 32.3 miles N c. 33.1 miles Y d. 34.4 miles 2289: You observe the lower limb of the Sun at a sextant altitude (hs) of 38°07.5' on 8 August . The index error is 5.2' off the arc. The height of eye is 72 feet (22 meters). What is the observed altitude (Ho)?
N a. 38°08.4' N b. 38°13.3' Y c. 38°19.2' N d. 38°23.4' 2367: At 0850, 4 January, you pass the Gage at Natchez, MS which reads 26.8 feet. The low water reference plane (LWRP) for Natchez is 6.1 feet. What is the water level in relation to the low water reference plane?
N a. 20.7 ft below Y b. 20.7 ft above N c. 32.9 ft below N d. 32.9 ft above 2651: You are steering 246°T, and a light is picked up dead ahead at a distance of 14 miles at 1037. You change course to pass the light 2.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 2.5 miles off the light?
N a. 1143 Y b. 1146 N c. 1149 N d. 1152 2689: You are steering 107°T, and a light is picked up dead ahead at a distance of 11 miles at 0847. You change course to leave the light 3 miles off to starboard. If you are making 15.5 knots, what is your ETA at the position 3 miles off the light?
Y a. 0928 N b. 0931 N c. 0934 N d. 0937 2904: Your vessel is on course 093°T at 15 knots. At 1835 a light bears 136°T, and at 1857 the same light bears 170°T. What was your distance off the light at 1857?
N a. 6.0 miles N b. 6.4 miles Y c. 6.8 miles N d. 7.2 miles 2905: You are steaming on a course of 215°T at 14 knots. At 1841 you observe a lighthouse bearing 178°T. At 1904 the same lighthouse bears 156°T. What is your distance off at the second bearing?
N a. 5.4 miles N b. 6.6 miles N c. 7.5 miles Y d. 8.7 miles 3064: The propeller of a vessel has a pitch of 19.0 feet. If the vessel traveled 183.5 miles (observed distance) in 24 hours at an average of 44 RPM, what was the slip?
Y a. +7.4% N b. -7.4% N c. +11.6% N d. -11.6% 3068: Your vessel's propeller has a pitch of 22'06". From 0530, 19 March, to 1930, 20 March, the average RPM was 82. The distance run by observation was 721.5 miles. What was the slip?
N a. +4% Y b. -4% N c. +7% N d. -7% 3612: Your vessel is steering 195° per standard magnetic compass. Variation for the area is 13°W, and the deviation is 4°E. The wind is from the west-southwest, producing a 2° leeway. Which true course are you making good?
N a. 178°T N b. 180°T N c. 182°T Y d. 184°T 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 11507: At 1014 you depart the entrance to Lake Montauk with light "1" close aboard. Your course is 066° per standard magnetic compass, and the speed is 8.6 knots. At 1222 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the speed made good?
N a. 8.4 knots N b. 8.6 knots Y c. 9.2 knots N d. 9.6 knots 12308: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 094° per standard magnetic compass. If your vessel was heading 207° per standard magnetic compass at the time, which of the following is TRUE?
Y a. The deviation table is correct for that heading. N b. The deviation by observation is 3°E. N c. The compass error is 12°W. N d. You should subtract 18° from all bearings of 094°. 12703: You are on course 025° per standard magnetic compass when you take the following bearings: Point Judith Light - 072°psc Block Island North Point Light - 118°psc Watch Hill Light - 306°psc What s your position?)
N a. LAT 41°14.9'N, LONG 71°43.2'W N b. LAT 41°15.1'N, LONG 71°44.0'W Y c. LAT 41°15.4'N, LONG 71°43.1'W N d. LAT 41°15.6'N, LONG 71°42.8'W 13804: What is the significance of the broken magenta lines which roughly parallel the shore between Roanoke Point and Orient Point on Long Island?
N a. They mark the limits of breakers in that area. N b. These lines warn the mariner of submerged rocks. Y c. They mark the boundary lines of fish trap areas. N d. These lines warn the mariner of submerged pipelines. 15038: At 0705 you obtained the following Loran readings:
9960-X-27091.2
9960-Y-41612.8
9960-Z-58744.2
What is your vessel's position?
N a. 37°20.4'N 75°30.2'W Y b. 37°20.8'N 75°29.9'W N c. 37°21.3'N 75°29.5'W N d. 37°21.2'N 75°30.4'W 15043: At 0811 your vessel's position is 37°04.9'N, 75°39.7'W. You are steering a course of 220° true at a speed of 14.0 knots. At what time would you expect the buoys in the northeasterly traffic scheme to line up, if you do not correct for a southwesterly current of 1.8 knots?
N a. 0826 N b. 0831 Y c. 0837 N d. 0846 15066: If you correct for the current in the preceding question (035°T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy "W"?
N a. 1016 Y b. 1021 N c. 1026 N d. 1030 15444: At 2306, as you pass through Trestle "C", you take a gyro bearing of the trestle when it is in line. The bearing is 049.0°. What is the gyro error?
Y a. 0° N b. 1.5°E N c. 1.0°W N d. 2.5°W 15656: At 0630, Buoy "PI" is close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 210°pgc and Race Rock Light is bearing 075°pgc. What is your 0654 position?
N a. LAT 41°19.0'N, LONG 72°05.2'W N b. LAT 41°14.4'N, LONG 71°54.6'W N c. LAT 41°14.2'N, LONG 72°06.8'W Y d. LAT 41°14.0'N, LONG 72°05.3'W 15808: At 0005, on 26 January, your position is LAT 41°11.8'N,
LONG 72°20.5'W. From this position, you plot a course to steer to a point one half mile north of Mattituck Breakwater Light "MI" with an engine speed of 9.0 knots. If there are no set and drift, what course should you steer?
N a. 207°psc N b. 213°psc N c. 220°psc Y d. 235°psc 16057: What is the maximum allowable speed of vessels underway up river from Tue Marshes Light?
N a. 8 knots N b. 10 knots Y c. 12 knots N d. 14 knots 16342: At 2302 you fix your position at LAT 40°57.8'N, LONG 71°39.3'W. What current have you experienced since your 2209 fix?
Y a. 105°T at 1.0 knot N b. 105°T at 0.9 knot N c. 285°T at 1.0 knot N d. 285°T at 0.9 knot 16444: At 1042 you take the following round of bearings:
Cape Henry Light 259°T
Chesapeake Light 101°T
Cape Charles Light 006°T
From this position, you set course 070°T at a speed of 9.5 knots.
What is the course per standard magnetic compass?
N a. 069.5°psc N b. 060.5°psc Y c. 079.5°psc N d. 080.5°psc