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.
70: What is the vertical clearance of the Natchez-Vidalia Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.5 feet)?
N a. 125.6 ft Y b. 119.5 ft N c. 108.3 ft N d. 102.2 ft 87: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 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?
N a. 0821, 21 April Y b. 0028, 21 April N c. 1830, 20 April N d. 1445, 20 April 100: Which of the following statements concerning the buoys on the Mississippi River is TRUE?
Y a. Buoy locations may be changed to indicate the channel for the existing river stage. N b. The buoys are maintained on station year round. N c. Buoys have permanent moorings on the river bottom and will not shift position. N d. The position of river buoys can be determined by consulting the latest Light List - Vol. V. 128: At Filter Point Light (mile 475 AHP) there are 2 close straight dashed lines on the map. What do these lines represent?
N a. Submerged oil pipelines N b. Submerged telephone cables N c. Submerged gas pipelines Y d. Aerial power cables 166: If the Bayou Sara Gage reads -0.5 feet, the Low Water Reference Plane is 5.25. What is the water level in relation to the low water reference plane?
N a. 0.5 foot below the plane N b. 0.5 foot above the plane N c. 5.25 feet above the plane Y d. 5.75 feet below the plane 181: You are on course 192°pgc at 12 knots. At 1900 you fix your position using the following information:
Sand Shoal Inlet South Light bearing 244°true @ 11 nm
What is your latitude and longitude at 1900?
N a. LAT 37°21.5'N, LONG 75°34.8'W N b. LAT 37°22.0'N, LONG 75°34.9'W N c. LAT 37°22.2'N, LONG 75°35.0'W Y d. LAT 37°22.6'N, LONG 75°35.7'W 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 207: If your height of eye is 35 feet (10.7 meters), what is the approximate geographic range of Block Island North Light?
N a. 7.4 nm N b. 13.0 nm Y c. 15.8 nm N d. 17.5 nm 222: From your 1815 position, you want to make good a course of 263°T. Your engines are turning RPM's for 12 knots. The current is 050°T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light?
Y a. 1904 N b. 1859 N c. 1854 N d. 1849 328: From your 0315 position, what time can you expect to reach York Spit Channel Buoys "37" and "38"?
N a. 0423 N b. 0417 N c. 0412 Y d. 0405 594: After you get underway, what is the first river gage you will pass?
N a. Head of Passes Y b. Donaldsonville N c. Baton Rouge N d. Red River Landing 1076: On 25 Mar , your 0500 ZT DR position is LAT 28°14.0'S, LONG 93°17.0'E. You are on course 291°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0550 running fix. NP-0006
Y a. LAT 28°15.9'S, LONG 92°56.9'E N b. LAT 28°19.3'S, LONG 92°59.0'E N c. LAT 28°06.4'S, LONG 93°02.5'E N d. LAT 27°53.2'S, LONG 93°17.6'E 1179: On 26 September , your 0830 zone time DR position is LAT 26°04.0'N, LONG 129°16.0'W. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1124 N b. 1127 N c. 1130 N d. 1133 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 1247: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 5.6 mph Y b. 4.4 mph N c. 2.1 mph N d. 1.8 mph 1259: On 10 April , your 1630 ZT DR position is LAT 21°03.0'N, LONG 63°11.0'W. You are on course 324°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?
N a. 1805 N b. 1814 N c. 1818 Y d. 1833 1420: What company does NOT have a marine facility along the river bank in Helena (mile 661 to 665 AHP)?
N a. Helena Port Terminal, Inc. Y b. Riceland Food Corps.. N c. Quincy Soybean Co. N d. Texas Eastern Pipeline Co. 1488: At 2326 ZT, on 22 June , your vessel's position is LAT 28°30'N, LONG 150°04'W. An azimuth of the planet Jupiter is observed, and the standard compass bearing is 250.4°. The chronometer reads 09h 24m 36s and is 01m 12s slow. The variation of this area is 13.5°E. What is the deviation of the standard compass?
N a. 3.0°W N b. 3.5°W N c. 1.5°E Y d. 2.3°E 1663: On 7 April , in DR position LAT 27°42.0'N, LONG 114°03.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 076°psc. The chronometer reads 02h 10m 17s and is 01m 52s slow. Variation in the area is 8°E. What is the deviation of the standard magnetic compass?
Y a. 1.8°W N b. 2.3°E N c. 6.2°E N d. 7.8°W 1690: The locations of locks and dams can be found in the __________.
N a. Army Corps. of Engineers maps Y b. Light List N c. Local Notice to Mariners N d. Channel Report 1902: On 22 April , your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 077°T at an observed altitude (Ho) of 18°58.7'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?
N a. Diphda N b. Betelgeuse N c. Gienah Y d. Arcturus 1920: On 17 March , your 0520 Dr position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 313°T at an observed altitude (Ho) of 43°03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?
N a. Altair Y b. Alkaid N c. Arcturus N d. Deneb 2121: At 1337 ZT, on July 17, , in DR position LAT 30° 56.8' S, LONG 039° 36.5' W, you observe an amplitude of the Moon. The upper limb of the moon is on the visible horizon, bearing 263.0°psc. The variation is 20°W. What is the deviation?
N a. 2.6°E N b. 2.6°W Y c. 3.6°E N d. 3.6°W 2171: On 8 August , at 0545 ZT, morning stars were observed, and the vessel's position was determined to be LAT 26°16.0'
S, LONG 94°16.0'E. Your vessel is steaming at 20.0 knots on a course of 346°T. A sextant observation of the Sun's lower limb is made at 0905 ZT. The chronometer reads 03h 02m 52s, and the sextant altitude (hs) is 38°07.5'. The index error is 5.2' off the arc, and the chronometer error is 2m 17s slow. Your height of eye on the bridge is 72 feet (22.0 meters). What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?
Y a. 38°19.4', 048.4°T N b. 38°19.4', 131.6°T N c. 38°54.9', 048.4°T N d. 38°54.9', 131.6°T 2180: On 12 April , at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What are the intercept (a) and azimuth (Zn) from the assumed position of this sight?
N a. Zn 057.7°, a 15.4' T Y b. Zn 057.0°, a 17.7' A N c. Zn 122.3°, a 17.7' A N d. Zn 123.0°, a 22.7' A 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' 2291: You are taking a time tick using the 2100 signal from Callao, Peru. 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 09h 00m 10s. When compared to the chronometer, the comparing watch reads 09h 01m 20s, and the chronometer reads 08h 59m 22s. What is the chronometer error?
Y a. 1m 48s slow N b. 0m 38s slow N c. 1m 10s fast N d. 0m 10s fast 2320: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?
N a. 48.0 feet Y b. 53.2 feet N c. 68.2 feet N d. 116.0 feet 2339: You have steamed 1260 miles at 18 knots, and consumed 205 tons of fuel. If you have to steam 1423 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 16 knots?
N a. 143 tons N b. 183 tons Y c. 293 tons N d. 333 tons 2460: You have steamed 499 miles at 21 knots and burning 462 barrels of fuel per day. You must decrease your consumption to 221 barrels per day with 311 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 17.3 Y b. 18.4 N c. 19.1 N d. 20.0 2685: You are steering 031°T, and a light is picked up dead ahead at a distance of 12.7 miles at 0017. You change course to pass the light 3.5 miles off abeam to starboard. If you are making 11 knots, what is your ETA at the position 3.5 miles off the light?
N a. 0118 N b. 0121 Y c. 0124 N d. 0127 2895: You are steaming on a course of 246°T at 17 knots. At 2107 you observe a lighthouse bearing 207°T. At 2119 the lighthouse bears 179°T. What is your distance off at the second bearing?
N a. 3.9 miles N b. 4.2 miles Y c. 4.6 miles N d. 5.1 miles 2912: Your vessel is on a course of 079°T at 11 knots. At 0152 a light bears 105.5°T, and at 0209 the light bears 124°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0219, 2.3 miles Y b. 0226, 3.1 miles N c. 0233, 3.9 miles N d. 0242, 4.7 miles 3096: If the pitch of the propeller is 20.1 feet, and the revolutions per day are 118,178, calculate the day's run allowing 6% negative slip.
N a. 367.2 miles N b. 381.6 miles N c. 398.4 miles Y d. 414.1 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 3282: While steaming at 16.3 knots, your vessel consumes 363 barrels of fuel oil per day. In order to reduce consumption to 298 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 12.6 knots N b. 13.1 knots N c. 14.7 knots Y d. 15.3 knots 3305: You have steamed 201 miles and consumed 18.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 482 miles?
N a. 25.2 tons Y b. 43.2 tons N c. 52.6 tons N d. 103.5 tons 3639: You desire to make good a true course of 132°. The variation is 10°W, magnetic compass deviation is 5°E, and gyrocompass error is 5°W. A northeast by east wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make the true course good?
Y a. 132°psc N b. 135°psc N c. 137°psc N d. 142°psc 10203: Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming there is no set and drift, what course must you steer per standard magnetic compass (psc) to arrive at a position 3 miles due north of Horton Point Light?
N a. 077°psc N b. 081°psc Y c. 085°psc N d. 088°psc 10600: At 1620 your GPS indicates a position of LAT 41°09.0'N, LONG 72°40.0'W. You are on course 134° per standard magnetic compass at a speed of 10 knots. At 1700 your GPS indicates your position as LAT 41°05.3'N, LONG 72°33.7'W. What were the set and drift?
N a. 067°T at 1.7 knots N b. 078°T at 1.1 knots N c. 243°T at 1.0 knot Y d. 249°T at 1.6 knots 10607: At 0912 your GPS position is LAT 41°04.9'N, LONG 72°42.1'W. You are on course 085° per standard magnetic compass at a speed of 6 knots. At 1052 your GPS position is 0.5 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift?
N a. 145°T at 1.2 knots N b. 148°T at 0.9 knot N c. 320°T at 1.3 knots Y d. 325°T at 0.7 knot 11100: Block Island is __________.
N a. surrounded by wide sandy beaches N b. a low, marshy island Y c. hilly with elevations to 200 feet (60.5 m) N d. a national bird sanctuary 11309: At 1919 your position is LAT 37°00.5'N, LONG 75°43.8'W. At 2019 your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course made good?
N a. 090°T Y b. 093°T N c. 096°T N d. 099°T 12600: You are on course 243° per standard magnetic compass when you take the following bearings: Falkner Island Light 342°psc Mattituck Inlet Light 207°psc Horton Point Light 112°psc What is your position?
N a. LAT 41°05.9'N, LONG 72°32.7'W N b. LAT 41°05.7'N, LONG 72°31.8'W Y c. LAT 41°05.5'N, LONG 72°32.6'W N d. LAT 41°05.3'N, LONG 72°31.9'W 13002: At 0829 your position is LAT 41°02.9'N, LONG 72°57.4'W. You are making turns for 8.5 knots. What is your ETA at a position midway between buoys "1" and "2" at the entrance of New Haven Outer Channel?
N a. 0925 N b. 0931 N c. 0938 Y d. 0944 15623: 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?
Y a. 1.4 MPH N b. 1.8 MPH N c. 2.7 MPH N d. 6.2 MPH 15710: From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 3°
leeway. What course should you steer per standard magnetic compass in order to make good your true course?
N a. 118°psc Y b. 115°psc N c. 112°psc N d. 109°psc 15741: At 2050 Montauk Point Light is bearing 337° true at a range of 8 nm, From this position, you change course in order to pass 1 mile due east of Montauk Point Lighted Whistle Buoy "MP". If there are no set and drift, what course must you steer?
Y a. 024°T N b. 028°T N c. 032°T N d. 036°T 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 15761: From point "A", you lay out an intended track line to a point where Block Island North Light bears 180°T at 2.9 miles (Point "B"). What is the length of this leg of the voyage?
N a. 20.4 miles N b. 23.7 miles Y c. 24.4 miles N d. 25.3 miles 15766: From your 0745 fix, you change course to pass 1.0 mile south of buoy "WH" and estimate your speed at 7 knots. If the visibility clears, what is the earliest time you can expect to see Block Island North Light tower?
N a. The tower is in sight at 0745. N b. 0750 Y c. 0806 N d. 0838 15965: If the visibility is 5 miles, what is the luminous range of New Point Comfort Spit Light "4"?
N a. 0.5 mile Y b. 3.4 miles N c. 4.8 miles N d. 5.0 miles 16116: At 0731, approximately how much water is under your keel?
Y a. 31 feet (9.4 meters) N b. 45 feet (13.6 meters) N c. 48 feet (14.5 meters) N d. 54 feet (16.4 meters) 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