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.
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 143: At 1609, on October 5, you are abeam of Star Landing Lt. (mile 707.2 AHP) . You calculate your speed since you departed Sycamore Chute fleeting area. If you are turning for 9.5 mph what was the current?
N a. 1.0 mph N b. 1.5 mph Y c. 2.0 mph N d. 2.5 mph 248: You are southeast of Saybrook Breakwater Light passing Saybrook Bar Lighted Bell Buoy "8". This buoy marks __________.
N a. a sunken wreck N b. a bifurcation N c. the junction with the Connecticut River Y d. shoal water 297: What course should you steer per standard magnetic compass in order to navigate down the center of York River Entrance Channel (ignore set and drift)?
N a. 149°psc N b. 145°psc Y c. 141°psc N d. 139°psc 329: The engineer has advised that it will be necessary to secure the gyrocompass and the electronic equipment. From your 0315 position, what is your course per standard magnetic compass to York Spit Channel Buoy "38", if there is no current?
N a. 218°psc Y b. 216°psc N c. 214°psc N d. 212°psc 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° 409: A vessel steams 1082 miles on course 047°T from LAT 37°18.0'N, LONG 24°40.0'W. What is the latitude and longitude of the point of arrival by Mercator sailing?
N a. LAT 49°30.0'N, LONG 06°22.0'W N b. LAT 49°33.0'N, LONG 06°25.0'W Y c. LAT 49°36.0'N, LONG 06°28.0'W N d. LAT 49°39.0'N, LONG 06°31.0'W 569: At 0823, Old Point Comfort Light bears 000°T at 0.6 mile. What is your 0823 position?
N a. LAT 36°59.8'N, LONG 76°18.0'W Y b. LAT 36°59.5'N, LONG 76°18.4'W N c. LAT 36°59.0'N, LONG 76°19.6'W N d. LAT 36°55.5'N, LONG 76°18.6'W 636: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light?
N a. Green triangle N b. Red and green banded square N c. Green square daymark Y d. Diamond-shaped green daymark 827: On 16 November , your 1200 ZT DR position is LAT 26°48.0'S, LONG 124°32.0'W. Your vessel is on course 078°T, speed 17.0 knots. You observe an ex-meridian of the Sun's lower limb. The sextant (hs) reads 81°41.3'. The index error is 1.5' off the arc, and your height of eye is 56 feet. The chronometer time of the observation is 08h 15m 32s, and the chronometer is 03m 06s fast. What is your latitude at meridian transit?
Y a. 26°42.6'S N b. 26°47.1'S N c. 26°49.5'S N d. 26°52.3'S 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 1093: On 22 Nov. , your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0'S, LONG 42°40.0'W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix. NP-0023
Y a. LAT 28°27.0'S, LONG 42°38.0'W N b. LAT 28°25.2'S, LONG 42°40.0'W N c. LAT 28°25.0'S, LONG 42°36.0'W N d. LAT 28°23.4'S, LONG 42°42.0'W 1175: On 12 February , your 0900 zone time DR position is LAT 16°43.0'N, LONG 51°42.0'W. Your vessel is on course 093°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1237 N b. 1233 N c. 1230 N d. 1226 1194: On 16 January your 0930 ZT DR position is LAT 26°07.0'S, LONG 51°43.0'E. Your vessel is on course 238°T at a speed of 17.0 knots. What is the ZT of local apparent noon (LAN)?
Y a. 1145 N b. 1148 N c. 1152 N d. 1156 1195: On 23 June , your 0900 zone time DR position is LAT 21°26.0'N, LONG 137°46.0'W. Your vessel is on course 059°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1159 N b. 1205 Y c. 1210 N d. 1214 1653: On 28 Sept. , in DR position LAT 24°12.0'S, LONG 85°25.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 094°psc. The chronometer reads 11h 29m 42s and is 03m 30s slow. Variation in the area is 4°W. What is the deviation of the magnetic compass?
N a. 1.5°W N b. 2.1°W N c. 1.8°E Y d. 2.4°E 1684: You are passing Putney Lt. (mile 943.6 AHP). The gray shaded areas alongside the river represent __________.
N a. levees N b. weirs N c. dikes Y d. revetments 1770: What are the light characteriditcs of the Bunge Corporation Terminal Lights (2) at mile 570.6 AHP?
N a. a group flashing white light every five seconds N b. a flashing green light every 4 seconds Y c. a flashing green light every 6 seconds N d. a flashing red light every 4 seconds 1778: At 2234 ZT, on 14 July , in DR position LAT 34°03'N, LONG 150°16'W you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1°pgc. The variation is 14°E. What is the gyro error?
N a. 0.5°W N b. 0.5°E Y c. 1.5°W N d. 2.5°E 1854: On 22 July , your 1759 ZT DR position is LAT 24°50.2'S, LONG 05°16.0'E. You observe an unidentified star bearing 231°T, at an observed altitude (Ho) of 26°10.0'. The chronometer reads 06h 01m 31s and is 02m 15s fast. What star did you observe?
N a. Acamar N b. Capella N c. Miaplacidus Y d. Suhail 1857: On 22 May , your 0437 ZT DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 097°T at an observed altitude (Ho) of 48°20.0'. The chronometer reads 07h 40m 40s and is 03m 24s fast. What star did you observe?
Y a. Markab N b. Diphda N c. Sabik N d. Hamal 1891: On 22 July , your 1759 DR position is LAT 24°50.2'S, LONG 005°16.0'E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?
N a. Regulus N b. Antares Y c. Miaplacidus N d. Suhail 1892: On 22 July , your 0442 DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 091°T at an observed altitude (Ho) of 64°35.2'. The chronometer reads 05h 39m 03s, and is 03m 14s slow. What star did you observe?
Y a. Hamal N b. Rigel N c. Menkar N d. Acamar 1901: On 22 April , your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 248°T at an observed altitude (Ho) of 25°00.9'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?
Y a. Rigel N b. Betelgeuse N c. Gienah N d. Arcturus 1919: On 17 March , your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 110°T at an observed altitude (Ho) of 50°47.2'. The chronometer reads 08h 22m 15s, and is 01m 45s fast. What star did you observe?
Y a. Altair N b. Alkaid N c. Arcturus N d. Deneb 2018: On 11 November , your 0200 zone time DR position is LAT 26°32'S, LONG 154°16'E. You are on course 058°T at a speed of 21 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Polaris, Regulus, Rigel N b. Jupiter, Spica, Canopus N c. Saturn, Peacock, Rigel Y d. Mars, Betelgeuse, Miaplacidus 2457: You have steamed 369 miles at 16 knots and burning 326 barrels of fuel per day. You must decrease your consumption to 212 barrels per day with 271 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 11.1 N b. 12.9 N c. 13.6 Y d. 15.1 2462: You have steamed 504 miles at 21 knots and burning 633 barrels of fuel per day. You must decrease your consumption to 410 barrels per day with 399 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 20.1 Y b. 19.0 N c. 16.2 N d. 15.0 2534: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
N a. 0557, April 19th N b. 1045, April 19th Y c. 1242, April 19th N d. 1733, April 19th 2781: Your engine speed is 9.8 mph and you estimate the current at 1.6 mph. What is your speed over the ground?
N a. 11.0 mph N b. 9.8 mph N c. 8.6 mph Y d. 8.2 mph 2875: Your vessel is on a course of 316°T at 12 knots. At 2326 a light bears 289.5°T, and at 2354 the light bears 271°T. At what time and at what distance off will your vessel be when abeam of the light?
N a. 0014, 4.8 miles N b. 0018, 5.2 miles Y c. 0022, 5.6 miles N d. 0026, 6.4 miles 3080: If the speed necessary for reaching port at a designated time is 21.6 knots and the pitch of the propeller is 22.5 feet, how many revolutions per minute will the shaft have to turn, assuming a 2% positive slip?
N a. 81 N b. 87 N c. 95 Y d. 99 3083: The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many RPM's will the shaft have to turn?
Y a. 81 RPM N b. 87 RPM N c. 98 RPM N d. 104 RPM 3083: The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many RPM's will the shaft have to turn?
Y a. 81 RPM N b. 87 RPM N c. 98 RPM N d. 104 RPM 3108: You are turning 105 RPM, with a propeller pitch of 17 feet, and an estimated slip of -1%. What is the speed of advance?
N a. 15.3 knots N b. 16.9 knots N c. 17.4 knots Y d. 17.8 knots 3609: Enroute from Rio to Montevideo, the true course is 215°; the gyro error is 2° west. A north wind causes 3° leeway. What course would you steer per gyrocompass to make good the true course?
Y a. 220°pgc N b. 214°pgc N c. 216°pgc N d. 210°pgc 4002: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a true heading of 258°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320°
N a. 0.5°W N b. 0.0° N c. 0.5°E Y d. 1.0°E 10503: At 0817 your GPS indicates a position of LAT 37°01.6'N, LONG 75°31.7'W. You are on course 182° per standard magnetic compass at a speed of 9.2 knots. At 0913 your GPS indicates your position at LAT 36°52.3'N, LONG 75°30.8'W. What were the set and drift?
N a. 121°T at 0.8 knot N b. 139°T at 1.1 knots Y c. 219°T at 1.1 knots N d. 298°T at 0.7 knot 11801: What course should you steer by standard magnetic compass (psc) between Horton Pt. Light and Falkner Island Light, if the set and drift of the current are 040°T at 0.9 knot, and a westerly wind will cause 2° of leeway? Your engines are making turns for 10 knots.
Y a. 314.0°psc N b. 319.0°psc N c. 324.5°psc N d. 328.5°psc 12607: You are on course 240° per standard magnetic compass when you take the following bearings: Old Field Point Light 253°psc New Haven Light 357°psc Mattituck Inlet Light 126°psc What is your position?
N a. LAT 41°04.5'N, LONG 72°49.2'W N b. LAT 41°05.7'N, LONG 72°50.2'W Y c. LAT 41°05.9'N, LONG 72°53.1'W N d. LAT 41°08.6'N, LONG 72°53.5'W 15270: The distance from New London to the east entrance of the Cape Cod Canal is __________.
N a. 66 miles N b. 77 miles Y c. 89 miles N d. 136 miles 15443: As you enter Chesapeake Bay, visibility improves. At 2235 you are between Chesapeake Channel Buoys "5" and "6" in the 41 foot dredged section of Chesapeake Channel. At that time, you change course to pass between buoys "9" and "10". If buoys "11" and "12" are extinguished, your best leading light to keep you in deep water in the Chesapeake Channel, as you approach the Chesapeake Bay Bridge and Tunnel, would be __________.
N a. fixed red light on trestle "C" Y b. fixed green light on trestle "B" N c. fixed red light on trestle "B" N d. Thimble Shoal Light 15506: You are underway in the vicinity of Block Island and obtain the following lines of position:
Montauk Point Light 263°pgc
Block Island Southeast Light 026°pgc
Radar Bearing to Block Island Southwest Point 348°pgc
What is your position at the time of these sightings?
N a. LAT 41°05.0'N, LONG 71°36.2'W N b. LAT 41°05.1'N, LONG 71°36.0'W Y c. LAT 41°05.3'N, LONG 71°35.8'W N d. LAT 41°05.4'N, LONG 71°35.5'W 15565: From your 0600 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0 miles if a southerly wind is producing 3° of leeway?
N a. 251°pgc N b. 254°pgc N c. 257°pgc Y d. 261°pgc 15744: Montauk Point Light has a radar range of 3.9 miles and bears 170°T at 2232. What is the depth of water below your keel?
Y a. 40 feet N b. 60 feet N c. 70 feet N d. 80 feet 15758: What is your ETA at point "A"?
N a. 0637 N b. 0643 Y c. 0649 N d. 0700 15868: Stratford Shoal Middle Ground Light is __________.
N a. 13 foot high N b. a fixed white light N c. shown from a white tower Y d. equipped with a HORN 16146: From your 2054 position, you change course to 066°T. Maintaining course and speed of 18 knots, at what time can you expect to first cross the 90-foot curve if you experience no set and drift?
Y a. 2105 N b. 2111 N c. 2117 N d. 2125 16339: Based on your 2209 fix, which would be a warning that you are being set down on Block Island Sound South Entrance Obstruction Lighted "BIS" Buoy?
Y a. Decreasing loran readings on 9960-W N b. Visual bearings of Montauk Point Lt. changing to the left N c. Increasing bearings of Southeast Point Light N d. Decreasing soundings 16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?
Y a. 194°psc N b. 190°psc N c. 187°psc N d. 180°psc 16469: As you pass between trestle "B" and trestle "C" of the Chesapeake Bay Bridge - Tunnel, you sight along the trestle "C" when it is in line. The trestle bears 057° per standard magnetic compass while the vessel is heading 320°T. From this you know the __________.
Y a. vessel should be swung to check the deviation table N b. compass error is 12°W N c. deviation table is correct for that bearing N d. deviation is 10°W 16558: From your position you observe a rotating white and green light to the north. This light is most likely __________.
Y a. at an airport N b. on a naval mine-countermeasures vessel N c. "Block Island North Light" N d. on a vessel engaged in public safety activity 16710: In clear weather, how far away will you sight Point Judith Light? (use charted range of 20 miles as nominal range)
N a. 9.2 nm N b. 10.6 nm N c. 12.3 nm Y d. 14.0 nm 16719: You are bound for New London. Where will you cross the demarcation line and be governed by the Inland Rules of the Road?
N a. You are already governed by the Inland Rules. Y b. In the Race N c. Above the Thames River Bridge N d. You will not be governed by the Inland Rules. 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