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.
58: What daymark will you see as you approach Warnicott Bar Lt. (mile 351.3 AHP)?
N a. Red diamond N b. Red triangle N c. White square Y d. Green square 75: What is your ETA at the Memphis Highway Bridge?
N a. 1813, 22 Sept N b. 1405, 22 Sept Y c. 1052, 22 Sept N d. 0828, 22 Sept 123: On which map would you find Redman Point, Arkansas?
Y a. 20 N b. 23 N c. 29 N d. 37 141: Your vessel is making turns for 9.5 mph and you estimate the average current for the trip will be 2.5 mph. What will be your ETA Donaldsonville, LA?
Y a. 1222 on 7 October N b. 1823 on 7 October N c. 0443 on 8 October N d. 1033 on 8 October 153: What is the minimum maintained depth of the channel from Cairo to Baton Rouge during low water?
Y a. 9 feet N b. 12 feet N c. 15 feet N d. 18 feet 158: Which daymark should you see as you approach French Point Light (mile 915.4 AHP)?
Y a. Red triangle N b. Green square N c. Red diamond N d. Green diamond 192: At 2100, Cape Charles Light bears 321°pgc, and Cape Henry Light bears 247°pgc. Your latitude is __________.
N a. 37°00.6'N N b. 37°00.0'N N c. 36°59.7'N Y d. 36°59.4'N 232: At 0700, Stratford Shoal Middle Ground Light bears 137°pgc. From your radar, you get a bearing of 007°pgc to the south tip of Stratford Point with a range of 4.5 miles. What is your 0700 position?
N a. LAT 41°04.6'N, LONG 73°07.0'W N b. LAT 41°04.6'N, LONG 73°06.6'W N c. LAT 41°04.6'N, LONG 73°07.4'W Y d. LAT 41°04.6'N, LONG 73°07.2'W 238: At 0910, your DR position is LAT 41°11.9'N, LONG 72°47.8'W. Your vessel is on course 097°T at 9.5 knots, and the weather is foggy. At 0915, Branford Reef Light is sighted through a break in the fog bearing 318°T. At 0945, Falkner Island Light is sighted bearing 042°T. What is your 0945 running fix position?
N a. LAT 41°11.1'N, LONG 72°41.2'W N b. LAT 41°11.3'N, LONG 72°41.3'W Y c. LAT 41°11.5'N, LONG 72°40.7'W N d. LAT 41°11.8'N, LONG 72°40.2'W 284: Based on a DR, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone N b. cross a submerged pipeline Y c. depart a regulated area N d. depart a restricted area 441: You get underway at 1030. The wind is out of the SSE and you estimate 3° leeway. What course should you steer per gyrocompass to make good a desired course of 075°T?
Y a. 080°pgc N b. 078°pgc N c. 076°pgc N d. 074°pgc 479: The great circle distance from LAT 24°25.3'N, LONG 83°02.6'W to LAT 35°57.2'N, LONG 5°45.7'W is 3966.5 miles. Determine the latitude of the vertex.
N a. 38°46.2'N N b. 38°16.4'N Y c. 38°09.4'N N d. 37°57.3'N 485: Determine the great circle distance and initial course from LAT 08°53.0'N, LONG 79°31.0'W to LAT 33°51.5'S, LONG 151°13.0'E.
N a. 7809 miles, 247.0°T N b. 7763 miles, 247.0°T Y c. 7635 miles, 233.9°T N d. 7618 miles, 230.3°T 541: You depart LAT 16°24'S, LONG 169°38'W, for LAT 16°24'S, LONG 174°52'E. What are the course and distance by parallel sailing?
N a. 090°T, 301 miles N b. 090°T, 892 miles N c. 270°T, 301 miles Y d. 270°T, 892 miles 542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?
N a. 63°00.6' Y b. 63°01.5' N c. 63°02.9' N d. 63°04.1' 572: At 0908, you change course to 010°T. What course should you steer per standard magnetic compass?
N a. 359° Y b. 021° N c. 017° N d. 003° 706: The solid lines extending into the channel at mile 948 AHP are __________.
N a. revetments Y b. dikes N c. spoil areas N d. Westvaco Service Facilities 732: On 3 January , your 1759 zone time DR position is LONG 60°53.2'W. At that time you observe Polaris with a sextant altitude (hs) of 22°55.8'. The chronometer time of the sight is 09h 57m 10s, and the chronometer error is 02m 26s slow. The index error is 2.9' off the arc, and the height of eye is 52.5 feet. What is your latitude by Polaris?
N a. 21°35.2'N N b. 21°52.5'N Y c. 22°03.6'N N d. 22°22.6'N 812: On 28 July , your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?
N a. 26°25.0'N Y b. 26°27.6'N N c. 26°29.8'N N d. 26°32.0'N 823: On 15 October , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1146 ZT. Your DR position is LAT 22°42.0'N, LONG 139°52.0'E, and your sextant altitude (hs) is 58°30.4'. The index error is 3.4' on the arc, and your height of eye is 56.7 feet. The chronometer time of the observation is 02h 45m 06s, and the chronometer error is 01m 06s slow. Find the latitude at meridian transit from the ex-meridian observation.
N a. LAT 22°29.1'N Y b. LAT 22°35.2'N N c. LAT 22°58.1'N N d. LAT 23°20.6'N 1082: On 20 Nov. , your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1200 running fix. NP-0012
N a. LAT 27°16.8'N, LONG 157°30.5'E N b. LAT 27°22.6'N, LONG 157°37.8'E Y c. LAT 27°29.7'N, LONG 157°43.0'E N d. LAT 27°33.4'N, LONG 157°48.2'E 1208: On 12 July , your 0800 ZT DR position is LAT 24°15.0'N, LONG 132°30.0'W. Your vessel is on course 045°T at a speed of 15.0 knots. What is the ZT of local apparent noon (LAN)?
N a. 1146 N b. 1148 Y c. 1152 N d. 1159 1232: The Vaucluse Trench fill revetment on the LMR extends from mile __________.
N a. 524.3 - 522.6 RDB Y b. 535.6 - 532.9 RDB N c. 535.9 - 534.3 LDB N d. 534.3 - 532.6 LDB 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 1295: After passing Wilkinson Lt. you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________.
N a. stay in the deepest water N b. slow down due to dredging operations Y c. keep as close to the left descending bank as safety permits N d. keep as close to the right descending bank as safety permits 1804: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?
Y a. 1718, 20 April N b. 1830, 20 April N c. 0028, 21 April N d. 0821, 21 April 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 2054: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?
N a. 79.0 feet Y b. 71.7 feet N c. 65.2 feet N d. 59.1 feet 2335: You are underway and intend to make good a course of 088°T. You experience a current with a set and drift of 300°T at 2.4 knots, and a southerly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 16 knots. What will be your speed made good over your intended course of 088°T?
N a. 13.4 knots Y b. 13.9 knots N c. 14.4 knots N d. 14.9 knots 2370: As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground, if your vessel is making turns for 10.5 mph?
N a. 16.5 mph Y b. 13.5 mph N c. 10.5 mph N d. 7.5 mph 2854: Your vessel is on a course of 221°T at 15 knots. At 0319 a light bears 198.5°T, and at 0353 the light bears 176°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0407, 4.3 miles N b. 0410, 5.2 miles Y c. 0417, 6.0 miles N d. 0427, 7.4 miles 2874: Your vessel is on a course of 207°T at 13 knots. At 0539 a light bears 180.5°T, and at 0620 the light bears 162°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0633, 5.9 miles N b. 0641, 6.5 miles N c. 0653, 7.6 miles Y d. 0701, 8.9 miles 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 3254: You have steamed 746 miles at 14.0 knots, and consumed 152 tons of fuel. If you have 201 tons of usable fuel remaining, how far can you steam at 10 knots?
N a. 1381 miles Y b. 1934 miles N c. 2263 miles N d. 2707 miles 3616: You desire to make good a true course of 046°. The variation is 6°E, magnetic compass deviation is 12°W, and the gyrocompass error is 3°W. A northerly wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make good the true course?
Y a. 047°psc N b. 049°psc N c. 052°psc N d. 057°psc 3638: You desire to make good a true course of 007°. The variation is 5°E, magnetic compass deviation is 3°W, and gyrocompass error is 2°E. A southwest by west wind produces a 2° leeway. What is the course to steer per standard magnetic compass to make the true course good?
Y a. 003°psc N b. 005°psc N c. 007°psc N d. 009°psc 3649: The true course between two points is 078°. Your gyrocompass has an error of 2°E. You make an allowance of 3° leeway for a north wind. What gyro course should be steered to make the true course good?
Y a. 073°pgc N b. 075°pgc N c. 077°pgc N d. 079°pgc 4000: 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 magnetic compass heading of 057°.
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. 1.0°E N b. 1.5°E Y c. 1.5°W N d. 0.5°W 4003: 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 gyro heading of 058°.
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. 1.5°W N b. 1.0°W N c. 1.0°E N d. 0.5°W 11308: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 2011 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the speed made good?
Y a. 13.7 knots N b. 12.0 knots N c. 11.6 knots N d. 10.9 knots 12305: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 095° per standard magnetic compass. If your vessel was heading 056° per standard magnetic compass at the time, which of the following is TRUE?
N a. You should subtract 15°Compass error for bearings of 095°. N b. The deviation table is correct for all bearings of 095°. Y c. The vessel should be swung, and the deviation table checked. N d. The compass error is 19°W for all headings. 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 13004: At 1815 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT 41°13.3'N, LONG 72°10.8'W)?
N a. 2019 N b. 2028 Y c. 2032 N d. 2038 14205: You are off the coast of Mexico and are taking a time tick for 1600. At approximately 1554, you hear the preparatory signal "VVVV de XDD" from the time signal station. Then you hear a series of 1 second dashes followed by a 9 second silent period and then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 03h 59m 56s. When compared to the chronometer, the comparing watch reads 04h 01m 22s, and the chronometer reads 04h 02m 11s. What is the chronometer error?
N a. 0m 04s slow N b. 2m 15s slow Y c. 0m 45s fast N d. 1m 26s fast 15029: What type of daymark will you see as you approach Gold Dust Bar Light (mile 793.3 AHP) ?
Y a. Red diamond N b. Red triangle N c. Green square N d. Green diamond 15218: What is your 2118 position?
N a. LAT 36°57.0'N, LONG 76°01.5'W Y b. LAT 36°57.4'N, LONG 76°01.9'W N c. LAT 36°57.8'N, LONG 76°01.5'W N d. LAT 36°58.2'N, LONG 76°02.4'W 15645: You round Montauk Point and steer to make good 206°T. Speed is increased to 13.0 knots. The current, if any, is unknown. The visibility has improved and is estimated to be 5 miles. At 2144 Montauk Point Light bears 273°T. At 2202 the same light bears 320°T. Which statement concerning your 2202 running fix is TRUE?
N a. You are inside the lobster pot area. Y b. The fathometer reads about 12 fathoms. N c. You are inside of the 90 foot curve. N d. You are outside the boundary of the Territorial Sea and Contiguous Zone. 15667: At 0815, you change course to 079°T. To compensate for a southerly wind, you estimate a 3° leeway is necessary. Which course should you steer per standard magnetic compass to make good 079°T?
N a. 090°psc N b. 093°psc N c. 095°psc Y d. 099°psc 15906: 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 Y c. 2.0°W N d. 0° 16520: Which chart should you use to enter Great Salt Pond?
N a. 13214 N b. 13205 Y c. 13217 N d. 13207 16543: Based on the information in the previous question, what is your ETA at the distress scene?
N a. 0006 N b. 0010 Y c. 0016 N d. 0021 16713: At 0600 you take the following bearings:
Point Judith Light bearing 063°pgc
Block Island North Reef Light bearing 144°pgc
What is your 0600 position?
N a. LAT 41°18.1'N, LONG 71°38.3'W Y b. LAT 41°18.3'N, LONG 71°38.7'W N c. LAT 41°18.4'N, LONG 72°38.1'W N d. LAT 41°18.5'N, LONG 71°38.9'W 16846: Your vessel's heading is 330°pgc and 345°psc with a 2°E gyro error. What is the deviation on this heading?
N a. 0° Y b. 3°W N c. 4°E N d. 7°W