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.
257: At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 110°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 252°pgc N b. 257°pgc N c. 265°pgc Y d. 271°pgc 263: As you enter the New Haven Outer Channel, you sight the range markers in line directly over the stern. Your heading at the time is 155.5° per gyrocompass. What is the gyro error?
N a. 1.0°E N b. 1.0°W N c. 2.0°E Y d. 2.0°W 277: What chart should you use after you enter New London Harbor?
N a. 13211 N b. 13214 Y c. 13213 N d. 13272 311: A vessel at LAT 20°10'N, LONG 122°00'E is to proceed to LAT 26°18'N, LONG 128°20'E. What are the course and distance by mid-latitude sailing?
N a. 041.2°T, 501.0 miles N b. 041.9°T, 503.6 miles Y c. 043.5°T, 507.3 miles N d. 044.7°T, 509.7 miles 315: From your 1430 fix, you order turns for 8 knots. You steer 045°T and experience no set and drift. At what time would you expect to have New Point Comfort Spit Light "4" abeam?
N a. 1510 N b. 1504 Y c. 1458 N d. 1452 387: The wind is southerly, and you estimate 3° leeway. Allowing for leeway, what is the course to steer from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"?
Y a. 087°pgc N b. 085°pgc N c. 081°pgc N d. 079°pgc 535: You depart LAT 49°38'N, LONG 152°49'E, for LAT 49°38'N, LONG 176°12'E. What are the course and distance by parallel sailing?
Y a. 090°T, 909 miles N b. 090°T, 1204 miles N c. 270°T, 909 miles N d. 270°T, 1204 miles 549: In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 074°pgc. The helmsman was steering 303°pgc and 315° per standard magnetic compass at the time.
Which of the following is TRUE?
N a. The true line of the range is 072°. N b. The deviation based on the observation is 15°W. N c. The magnetic compass error is 12°W. Y d. The gyro error is exactly 1.5°E. 831: On 30 March , in DR position LAT 20°26.2'N, LONG 131°17.9'E, you take an ex-meridian observation of the Moon's lower limb at upper transit. The chronometer time of the sight is 10h 36m 02s, and the chronometer error is 02m 06s slow. The sextant altitude (hs) is 48°21.4'. The index error is 2.0' on the arc, and your height of eye is 40 feet. What is the latitude at meridian transit?
N a. LAT 20°44.8'N Y b. LAT 20°31.9'N N c. LAT 20Z°23.7'N N d. LAT 20°15.6'N 847: On 17 December , your 0600 ZT fix gives you a position of LAT 27°16.7'N, LONG 138°39.2'W. Your vessel is on course 137°T, and your speed is 14.8 knots. Local apparent noon (LAN) occurs at 1207 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 40°22.1'. What is the calculated latitude at LAN?
N a. 26°09.9'N N b. 26°11.6'N N c. 26°13.0'N Y d. 26°15.4'N 987: On 17 January , your 0730 zone time fix gives you a position of LAT 22°26.0'S, LONG 152°17.0'E. Your vessel is steaming on a course of 116°T at a speed of 17 knots. An observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 00h 13m 23s, and the chronometer error is 01m 49s slow. The observed altitude (Ho) is 66°02.1'. LAN occurs at 1152 zone time and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 87°54.2'. Determine the vessel's 1200 zone time position.
Y a. LAT 22°53.8'S, LONG 153°25.6'E N b. LAT 22°53.8'S, LONG 153°28.8'E N c. LAT 22°56.3'S, LONG 153°25.6'E N d. LAT 22°56.3'S, LONG 153°28.8'E 1140: At 0921, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 10.0 mph, what was the current since departure?
N a. 3.4 mph N b. 2.0 mph Y c. 1.7 mph N d. 1.4 mph 1191: On 14 October , your 0800 ZT DR position is LAT 28°22.0'N, LONG 161°17.0'E. Your vessel is on course 116°T at a speed of 17.5 knots. What is the ZT of local apparent noon (LAN)?
N a. 1142 N b. 1148 N c. 1152 Y d. 1156 1264: On 17 November , your 1530 ZT DR position is LAT 27°13.0'S, LONG 153°21.0'W. You are on course 261°T at a speed of 14 knots. What will be the ZT of sunset at your vessel?
N a. 1813 N b. 1828 N c. 1834 Y d. 1845 1271: At 0400 zone time, on 24 June , your DR position is LAT 23°10.0'N, LONG 085°33'W. You are steering 295°T at a speed of 10.0 knots. What is the zone time of sunrise?
N a. 0452 Y b. 0458 N c. 0504 N d. 0510 1392: On 3 February , your 0550 zone time DR position is LAT 26°16.0'N, LONG 112°05.0'W. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Spica, Antares, Saturn N b. Vega, Antares, Dubhe N c. Venus, Regulus, Vega Y d. Spica, Kochab, Rasalhague 1467: On 17 April , your 1610 ZT DR position is LAT 22°07.0'N, LONG 158°16.0'W. At that time, you observe the Sun bearing 271°psc. The chronometer reads 03h 08m 52s, and the chronometer error is 01m 16s slow. The variation is 4°E. What is the deviation of the standard magnetic compass?
N a. 1.1°W N b. 1.7°E Y c. 2.3°W N d. 2.9°E 1544: What is the distance in river miles, from the new mouth of the White River to the Petroleum Fuel & Terminal Co.(144.6 AHP)?
N a. 370 miles N b. 384 miles N c. 437 miles Y d. 454 miles 1677: On 23 August , at 0604 ZT, in DR position LAT 16°42.3'S, LONG 28°19.3'W, you observed an amplitude of the Sun. The lower limb was a little above the horizon, and the Sun bore 076.0°pgc. At the time of the observation, the helmsman reported that he was heading 143°pgc and 167°
per standard magnetic compass. The variation in the area was 23°W. What were the gyro error and deviation for that heading?
N a. 1°W GE, 2°W DEV N b. 1°E GE, 1°E DEV N c. 2°W GE, 1°E DEV Y d. 2°E GE, 1°E DEV 1736: What are the color and shape of Joseph Henry Daymark at mile 445.2 AHP?
N a. Red - Triangle N b. Green - Square N c. Green - Triangle Y d. Red - Diaomond 1851: On 23 September , while taking stars for an evening fix, an unidentified star is observed bearing 261°T at an observed altitude of 61°35'. Your 1836 zone time DR position is LAT 25°18'S, LONG 162°36'E. The chronometer reads 07h 34m 12s, and the chronometer error is 01m 54s slow. Your vessel is steaming on a course of 230°T at a speed of 18 knots. What star did you observe?
Y a. Antares N b. Canopus N c. Achernar N d. Sirius 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 1955: 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 2178: On 26 July , your 1901 ZT position is LAT 28°28'N, LONG 157°16'E when you take an observation of Jupiter. The chronometer at the time of the sight reads 08h 54m 34s and is 06m 24s slow. The sextant altitude (hs) is 33°51.5'. The index error is 2.8'off the arc, and the height of eye is 48 feet. What are the azimuth (Zn) and intercept (a) for this sight using the assumed position?
N a. Zn 110.8°, a 32.0' T N b. Zn 249.2°, a 32.0' A Y c. Zn 248.2°, a 34.2' T N d. Zn 290.8°, a 44.2' A 2297: The Platte River empties into which river?
N a. Mississippi N b. Ohio Y c. Missouri N d. Tennessee 2897: You are steaming on a course of 327°T at 13 knots. At 0207 you observe a lighthouse bearing 020°T. At 0226 the lighthouse bears 042°T. What is your distance off at the second bearing?
N a. 8.5 miles Y b. 8.9 miles N c. 9.2 miles N d. 9.7 miles 3055: The propeller on a vessel has a diameter of 24.6 feet and a pitch of 26.1 feet. What would be the apparent slip if the vessel cruised 462 miles in a 24 hour day (observed distance) at an average RPM of 72?
N a. -2.7% N b. +2.7% Y c. -3.8% N d. +3.8% 3076: If the speed necessary for reaching port at a designated time is 16.4 knots and the pitch of the propeller is 23.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 6% positive slip?
N a. 66 Y b. 74 N c. 82 N d. 90 3472: You are taking a time tick using the 2000 signal from Kekaha-Kauai, Hawaii (WWVH). You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 08h 00m 49s. When compared to the chronometer, the comparing watch reads 08h 01m 33s, and the chronometer reads 08h 00m 56s. What is the chronometer error?
Y a. 0m 12s fast N b. 0m 56s fast N c. 0m 44s slow N d. 1m 26s slow 3605: The true course from point A to point B is 317°. A SSW wind causes a 4° leeway, variation is 6°W and deviation is 1°E. What is the magnetic compass course to steer to make good the true course?
N a. 326°psc Y b. 318°psc N c. 313°psc N d. 308°psc 3650: The true course between two points is 194°. Your gyrocompass has an error of 2°W and you make an allowance of 1° leeway for a southwest wind. What gyro course should you steer to make the true course good?
N a. 193°pgc N b. 195°pgc Y c. 197°pgc N d. 199°pgc 3652: The true course between two points is 023°T. Your gyrocompass has an error of 1°W and you make an allowance of 4° leeway for an east wind. What gyro course should be steered to make the true course good?
N a. 020°pgc N b. 021°pgc N c. 026°pgc Y d. 028°pgc 4014: 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 157°.
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. 2.0°W Y b. 1.5°W N c. 1.0°W N d. 0.0° 10504: At 1354 your GPS indicates a position of LAT 37°00.0'N, LONG 75°45.8'W. You are on course 088° per standard magnetic compass at a speed of 9.5 knots. At 1500 your GPS indicates your position as LAT 37°01.6'N, LONG 75°31.7'W. What were the set and drift?
N a. 273°T at 0.8 knot N b. 241°T at 1.1 knots N c. 061°T at 1.3 knots Y d. 092°T at 0.9 knot 11406: At 2021 your position is LAT 41°09.7'N, LONG 72°59.8'W. At 2057 your position is LAT 41°00.5'N, LONG 72°49.5'W. What are your true course and speed made good?
Y a. 140° at 20 knots N b. 145° at 18 knots N c. 316° at 19 knots N d. 320° at 17 knots 11707: Your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course to steer per standard magnetic compass to arrive at LAT 36°59.0'N, LONG 75°48.5'W, if you are turning for 7.8 knots, the current is 139°T at 1.3 knots, and a northwesterly wind is causing 3° of leeway?
N a. 290.0°psc Y b. 286.0°psc N c. 283.5°psc N d. 280.5°psc 12605: You are on course 209° per standard magnetic compass when you take the following bearings: New Haven Light - 331.5°psc Branford Reef Light - 066.5°psc Old Field Point Light - 240.5°psc What is your position?
Y a. LAT 41°10.5'N, LONG 72°52.8'W N b. LAT 41°11.3'N, LONG 72°49.9'W N c. LAT 41°13.6'N, LONG 72°53.0'W N d. LAT 41°14.5'N, LONG 72°48.8'W 12908: At 0919 you are inbound, approximately 3.3 miles east of Cape Henry with buoy "15" close aboard to port. What is your ETA between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel if you are making 11.3 knots?
N a. 1010 Y b. 1014 N c. 1019 N d. 1025 13806: The chart symbol surrounding Saybrook Breakwater Light warns mariners that the navigational light structure is __________.
N a. no longer maintained Y b. protected by riprap N c. privately maintained N d. awash at high tide 15059: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. Which of the following is true?
N a. you should consult the sailing directions for pilotage requirements N b. you will pass 1.5 nm off Branford Reef Light Y c. your course will keep you clear of the 18' shoal N d. None of the above 15070: As you enter New London Harbor, you are steering on the entrance range. The lights are in line over the bow as you are heading 352°pgc. What is the gyro error?
Y a. 2°E N b. 0° N c. 1°W N d. 3°W 15114: Your 1900 position is LAT 37°12.9'N, LONG 76°13.5'W. You change course to 317°pgc and slow to 8.0 knots. What is the course per standard magnetic compass?
N a. 331°psc Y b. 329°psc N c. 311°psc N d. 309°psc 15357: If the visibility is 10 miles, what is the earliest time you can expect to see New Haven Light?
N a. The light is visible at 0452. N b. 0458 N c. 0510 Y d. You will not sight the light. 15460: At 0845, you are approaching the entrances to Thimble Shoal Channel. What channel must you use?
Y a. The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters), and you are not a passenger vessel. N b. The South Auxiliary Channel or Thimble Shoal Channel, but you must remain on the right hand side of the main channel. N c. The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12". N d. You are not permitted to use any of the channels, but must remain outside the buoyed channel line. 15466: At 1015, you estimate you have 139 miles to complete the voyage. If you average 9.5 knots, you will complete the voyage in __________.
N a. 14 hours 22 minutes N b. 14 hours 30 minutes Y c. 14 hours 38 minutes N d. 14 hours 44 minutes 15562: The two wavy magenta lines running to Green Hill Point represent __________.
N a. recommended approaches to Green Hill Point Y b. submarine cables N c. prohibited fishing areas N d. fish trap areas 15909: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. What loran reading will ensure that you will remain clear of the 18' shoal located 1 mile NW of Falkner Island Light?
N a. 9960 W: not less than 14942 N b. 9960 X: not more than 26452 Y c. 9960 Y: not less than 44013 N d. None of the above 16056: At 1730, your position is LAT 37°13.9'N, LONG 76°26.4'W. What is your distance off Tue Marshes Light?
N a. 2.2 miles Y b. 2.6 miles N c. 3.0 miles N d. 3.4 miles 16139: From your 1930 position, you set a course of 150°T. Your engine speed is 13 knots. What will be your distance off Valiant Rock Bell Buoy "1A" when abeam, if you make good your true course of 150°?
N a. 0.8 mile Y b. 1.0 miles N c. 1.2 miles N d. 1.4 miles 16265: At 0600, you are on course 241°psc at 6.5 knots. Chesapeake Light bears 153° per standard magnetic compass,
and Cape Henry Light bears 261° per standard magnetic compass. What is the position of your 0600 fix?
N a. LAT 36°59.0'N, LONG 75°47.4'W Y b. LAT 36°59.3'N, LONG 75°47.7'W N c. LAT 36°59.5'N, LONG 75°47.8' N d. LAT 36°59.3'N, LONG 75°48.0' 16611: At 0109 you get underway, and at 0112 you take the following set of bearings:
Branford Reef Light bearing 051°true
Stratford Point Light bearing 258°true
What is your 0112 position?
N a. LAT 41°11.2'N, LONG 72°51.7'W N b. LAT 41°11.4'N, LONG 72°50.5'W Y c. LAT 41°11.4'N, LONG 72°51.3'W N d. LAT 41°11.8'N, LONG 72°51.5'W