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.
34: You estimate the current at 3.0 mph. What is the speed over the ground?
N a. 9.5 mph N b. 7.5 mph N c. 4.5 mph Y d. 3.5 mph 64: What is the length of the trip?
N a. 726.0 miles Y b. 851.9 miles N c. 878.9 miles N d. 879.6 miles 69: Which type of daymark will you see as you approach Joe Pierce Light (mile 335.4 AHP)?
Y a. Red Triangle N b. Red square N c. Red diamond N d. Private aid - no daymark 198: While navigating inbound Thimble Shoal Channel system you must __________.
N a. navigate in the main channel when between Trestles A & B Y b. use the north auxiliary channel N c. remain 1500 yards (1360 meters) from large naval vessels N d. maintain a speed of six knots 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 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) 241: Little Gull Island Light is __________.
N a. lighted only during daytime when the sound signal is in operation Y b. lighted throughout 24 hours N c. maintained only from May 1 to Oct 1 N d. obscured by trees from 253° to 352° 254: At 0130, you obtain the following radar ranges:
Horton Point Light - 4.3 miles;
Mattituck Breakwater Light - 3.45 miles;
Duck Pond Point - 2.0 miles.
What were the course and speed made good between 0100 and 0130?
N a. 236°T at 9.4 knots Y b. 246°T at 9.8 knots N c. 259°T at 9.8 knots N d. 267°T at 9.4 knots 261: You must arrive at your final destination by 0800. The distance from your 0300 position to the final destination is 40.5 miles. What minimum speed must be made good to arrive on time?
N a. 9.6 knots N b. 9.3 knots N c. 8.5 knots Y d. 8.1 knots 349: From your 0430 position, what is the course per standard magnetic compass to a position where Twenty-eight foot Shoal lighted buoy "TE" is abeam to port at 1 mile?
Y a. 101.5° N b. 098.0° N c. 086.0° N d. 082.5° 398: You depart LAT 32°16.6'N, LONG 68°28.0'W. What is the course and distance as calculated by Mercator sailing to a position at LAT 43°12.2'N, LONG 55°39.0'W?
Y a. 042.8°T, 896.2 miles N b. 049.1°T, 955.1 miles N c. 132.8°T, 896.2 miles N d. 136.6°T, 955.1 miles 487: At 0700, your gyro alarm sounds. What course should you steer by the standard magnetic compass in order to maintain your original heading of 078°T?
Y a. 095°psc N b. 090°psc N c. 080°psc N d. 062°psc 520: On 29 June you observe the star Achernar at a sextant altitude (Hs) of 54°18.9'. The index error is 4.7' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)?
N a. 54°06.1' Y b. 54°15.5' N c. 54°31.5' N d. 54°43.7' 551: You are on course 092°T, and the engines are turning for 8 knots. At 0452, you take the following bearings:
Stratford Point Light 020°pgc Stratford Shoal (Middle Ground) Light 141°pgc
What is your 0452 position?
Y a. LAT 41°05.2'N, LONG 73°07.8'W N b. LAT 41°05.0'N, LONG 73°07.5'W N c. LAT 41°05.0'N, LONG 73°07.3'W N d. LAT 41°04.8'N, LONG 73°07.3'W 627: You are on a voyage from Halifax, Nova Scotia, to Galveston, TX. The distance is 2138 miles, and the speed of advance is 12.5 knots. You estimate 18.0 hours for bunkering enroute at Port Everglades, FL. If you sail at 0648 hours (ZD +4), 12 June, what is your ETA (ZD +5) at Galveston?
Y a. 0250, 20 June N b. 0350, 20 June N c. 0550, 20 June N d. 1350, 20 June 658: You are planning a voyage by great circle from LAT 59°00'N, LONG 07°00'W via LAT 38°00'N, LONG 61°30'W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. You are to the east of the Northern Hemisphere vertex. N b. When plotted on a Mercator chart the track line will be concave to Cape Farwell (Kap Farvel). Y c. All courses are in the southwest quadrant of the compass. N d. Distance is measured by using the length of a degree of latitude at the midpoint of the track line. 729: On 24 September , your 1841 zone time DR position is LONG 129°34.5'E. At that time you observe Polaris with a sextant altitude (hs) of 25°20.8'. The chronometer time of the sight is 09h 38m 12s, and the chronometer error is 03m 12s slow. The index error is 4.3' off the arc, and the height of eye is 52 feet (15.9 meters). What is your latitude by Polaris?
N a. 24°28.1'N N b. 25°16.0'N Y c. 25°37.6'N N d. 25°42.3'N 741: On 16 February , your 1845 ZT DR position is LAT 25°50.5'N, LONG 46°24.0'W. At that time you observe Polaris with a sextant altitude (hs) of 26°25.5'. The chronometer time of the sight is 09h 47m 30s and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 55.0 feet. What is your latitude by Polaris?
Y a. 25°38.0'N N b. 25°44.2'N N c. 26°00.1'N N d. 26°37.5'N 809: On 7 November , your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the calculated latitude at LAN?
N a. 27°52.3'N N b. 27°53.4'N N c. 27°55.1'N Y d. 27°57.2'N 1230: At 1814, on 11 September, 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 0930 the following day?
Y a. 8.7 mph N b. 7.7 mph N c. 6.3 mph N d. 5.6 mph 1496: On 3 October , your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 106°pgc and 107°psc. The variation is 0°. What is the deviation for that heading?
N a. 1°E Y b. 0° N c. 1°W N d. 2°W 1730: What is the distance from Arkansas City, AR, to St. Louis, MO, on the Mississippi River System?
Y a. 584 miles N b. 617 miles N c. 733 miles N d. 832 miles 1905: On 22 March , your 0519 DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 200°T at an observed altitude (Ho) of 33°05.5'. The chronometer reads 10h 16m 47s, and is 02m 15s slow. What star did you observe?
N a. Acamar N b. Enif Y c. Antares N d. Rigel 1949: The circle with black and white quadrants located at mile 435.6 AHP is a __________.
N a. Daymark N b. Electrical Tower Y c. River Gage N d. Information Board 1952: 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 2155: On 17 May , at 0501 zone time, morning stars were observed, and the vessel's position was determined to be LAT 22°16.0'S, LONG 103°46.0'W. Your vessel is steaming at 24.0 knots on a course of 301°T. A sextant observation of the Sun's lower limb is made at 0845 zone time. The chronometer reads 03h 43m 32s, and the sextant altitude is 28°24.7'. The index error is 1.5' off the arc, and the chronometer error is 02m 02s slow. Your height of eye on the bridge is 85.5 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 051.0°T Y b. 052.5°T N c. 054.2°T N d. 055.7°T 2159: On 25 May , your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?
N a. 069.6°T N b. 110.4°T N c. 249.6°T Y d. 290.4°T 2214: Which of the following statements regarding aids to navigation shown in the Corps. of Engineers map book is TRUE?
N a. The U.S. Army Corps.. of Engineers is responsible for placing and maintaining all aids to navigation. Y b. Buoys should always be given as wide a berth in passing as possible. N c. Buoy positions as shown on the chart are exact. N d. Lights and daymarks are always shown in their exact location. 2275: You observe the lower limb of the Sun at a sextant altitude (hs) of 24°00.7' on 10 January . The index error is 2.6' off the arc. The height of eye is 55 feet. What is the observed altitude (Ho)?
N a. 24°07.4' N b. 24°08.9' Y c. 24°10.2' N d. 24°11.8' 2285: You observe the lower limb of the Sun at a sextant altitude (hs) of 45°49.7' on 13 November . The index error is 1.0' on the arc. The height of eye is 61 feet (18.6 meters). What is the observed altitude (Ho)?
N a. 45°59.3' Y b. 45°56.4' N c. 45°52.9' N d. 45°49.8' 2533: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. List of Buoys and Daymarks N b. Coast Pilot N c. Army Corps. of Engineers Navigation Chart Y d. U.S.C.G. Local Notice to Mariners 2653: You are steering 019°T, and a light is picked up dead ahead at a distance of 11.6 miles at 0216. You change course to pass the light 3 miles off abeam to port. If you are making 14 knots, what is your ETA at the position 3 miles off the light?
N a. 0258 N b. 0301 Y c. 0304 N d. 0307 2908: Your vessel is on a course of 223°T at 17 knots. At 1323 a lighthouse bears 318° relative. At 1341 the same lighthouse bears 287° relative. What is your distance off the lighthouse at 1341?
N a. 4.3 miles N b. 5.1 miles Y c. 6.6 miles N d. 7.8 miles 3059: The propeller on a vessel has a diameter of 21.5 feet and a pitch of 24.5 feet. What would be the apparent slip if the vessel cruised 458 miles in a 23 hour day (observed distance) at an average RPM of 78?
N a. +5.6% Y b. -5.6% N c. +12.3% N d. -12.3% 3073: If the speed necessary for reaching port at a designated time is 16.8 knots and the pitch of the propeller is 22.3 feet, how many revolutions per minute will the shaft have to turn, assuming a 4% negative slip?
N a. 61 N b. 66 Y c. 73 N d. 80 3286: While steaming at 14.5 knots, your vessel consumes 242 barrels of fuel oil per day. In order to reduce consumption to 152 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 9.1 knots N b. 10.2 knots N c. 11.5 knots Y d. 12.4 knots 10102: Your GPS position is LAT 37°07.5'N, LONG 75°39.1'W. What is the course per standard magnetic compass (psc) to a position 0.3 mile due north of North Chesapeake Entrance Buoy NCA (LL #375)?
N a. 222°psc N b. 228°psc N c. 231°psc Y d. 234°psc 10109: What is the base course (psc) in the inbound northeasterly traffic lane of the Chesapeake Bay entrance traffic separation scheme?
Y a. 261°psc N b. 258°psc N c. 250°psc N d. 244°psc 13100: Your position is LAT 41°15.2'N, LONG 71°50.1'W at 1347. You are turning for 6.9 knots. What is your ETA at Shagwong Reef Buoy "7SR"?
Y a. 1506 N b. 1515 N c. 1521 N d. 1527 13301: The approach channel to the town of Cape Charles (LAT 37°16'N, LONG 76°01'W) has what controlling depth?
N a. 9 feet Y b. 17 feet N c. 20 feet N d. 40 feet 13802: Which chart would you use for more detailed information on the Connecticut River?
N a. 12354 N b. 12370 N c. 12371 Y d. 12375 15042: From your 0741 position, you wish to change course in order to pass 2.2 miles easterly of Cape Charles Lighted Bell Buoy "14". Your engine speed is now 14.0 knots. You estimate the current to be 240° true at 1.8 knots. What is the true course to steer to make good the desired course?
N a. 179°true N b. 185°true Y c. 190° true N d. 197°true 15068: Long Sand Shoal __________.
N a. shoals gradually on the north and south sides Y b. is hard and lumpy N c. shows breakers when northerly winds exceed 10 knots N d. has gray sand with scattered shells 15120: If you have 17.3 miles to reach your destination from your 2000 position and want to be there at 2230, what speed should you make good?
N a. 5.7 knots N b. 6.1 knots N c. 6.5 knots Y d. 6.9 knots 15163: Which statement concerning your 1920 position is TRUE?
Y a. You are entering a restricted area. N b. You are governed by the Inland Rules of the Road. N c. You are within the Chesapeake Bay Entrance traffic separation scheme. N d. On your present course Trestle "C" of the Chesapeake Bay Bridge - Tunnel is dead ahead. 15238: At 0930 you obtain a position from the following information: Race Rock Light bears 110°T at a range of 1.4 miles, and Goshen Point bears 330°T at a range of 3.3 miles. What are your present latitude and longitude?
N a. 41°16.0'N, 72°09.5'W Y b. 41°15.1'N, 72°04.6'W N c. 41°17.4'N, 72°06.0'W N d. 41°14.6'N, 72°03.0'W 15458: You are delayed in sailing due to engineering problems. You get underway at 0630. A Coast Guard radio broadcast advises that an aircraft carrier will transit the Elizabeth River enroute Norfolk Naval Shipyard and a safety zone is in effect. Further information on how far you must remain from the carrier found is in __________.
N a. PUB 117 N b. Light List Y c. Coast Pilot N d. Chart Number 1 15624: The Gage at Red River Landing reads 22.2 feet. The low water reference plane for Red River is 10.6 feet. How many feet is this above the low water reference plane?
N a. 10.6 ft Y b. 11.6 ft N c. 22.2 ft N d. 32.8 ft 16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T?
N a. 0601 Y b. 0609 N c. 0620 N d. 0624 16306: At 0345, you set a course to depart New London Harbor. Assuming no set and drift, which standard magnetic compass course must you steer to stay in the middle of the channel?
N a. 175°psc Y b. 187°psc N c. 190°psc N d. 192°psc 16310: 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?
Y a. 52 feet (15.8 meters) N b. 57 feet (17.3 meters) N c. 62 feet (18.8 meters) N d. 67 feet (20.3 meters) 16413: 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. 185° N b. 187° Y c. 190° N d. 193° 16459: What is the course to steer per gyro compass from the anchorage to point "A" if easterly winds are causing 3° of leeway?
N a. 178°pgc Y b. 181°pgc N c. 185°pgc N d. 189°pgc 16743: At 0040 you are south of Lewis Point when you receive word that the distress is terminated. You alter course to head for The Race. At 0052 you take the following relative bearings because the starboard gyro repeater is inoperative. Your heading at each bearing was 285°pgc. What is your 0052 position?
Race Rock Light 002°
Watch Hill Light 034°
Block Island North Light 122°
N a. LAT 41°08.8'N, LONG 71°41.4'W N b. LAT 41°09.0'N, LONG 71°42.3'W N c. LAT 41°09.0'N, LONG 71°41.1'W Y d. LAT 41°09.1'N, LONG 71°41.7'W