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.
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 279: At 1752, your position is LAT 37°04.3'N, LONG 76°06.4'W. On a flood current you should expect to be set to the __________.
N a. south southeast N b. south southwest N c. east southeast Y d. north northwest 509: At 0112, the radar range to Branford Reef Light is 2.9 miles. At 0125, the range is 3.6 miles. What is the position of your 0125 running fix if you are steering 124°T at 12 knots?`
N a. LAT 41°09.3'N, LONG 72°48.7'W Y b. LAT 41°09.7'N, LONG 72°48.1'W N c. LAT 41°09.8'N, LONG 72°47.2'W N d. LAT 41°10.2'N, LONG 72°47.7'W 547: 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 100°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 267°pgc Y b. 263°pgc N c. 255°pgc N d. 250°pgc 702: If the highest point of your towboat is 54 feet above the water and the Natchez Gage reads 24.8 feet, what will be your vertical clearance when passing under the Natchez-Vidalia westbound Highway Bridge?
N a. 35.9 feet N b. 43.2 feet Y c. 47.2 feet N d. 57.5 feet 743: On 7 March , at 1838 ZT, in DR position LAT 34°26.9'N, LONG 58°16.2'W, you observe Polaris for latitude. The sextant altitude (hs) is 35°08.4'. The index error is 2.5' off the arc. The height of eye is 54 feet. What is the latitude at the time of the sight?
N a. 34°29.8'N Y b. 34°33.4'N N c. 34°34.8'N N d. 34°36.8'N 830: On 23 August , in DR position LAT 24°22.0'S, LONG 64°55.3'E, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 02h 15m 04s, and the chronometer error is 01m 06s fast. The sextant altitude (hs) is 48°03.6'. The index error is 2.0' on the arc, and your height of eye is 60 feet (21.0 meters). What is the latitude at meridian transit?
Y a. 24°20.5'S N b. 24°22.8'S N c. 24°24.8'S N d. 24°49.5'S 988: On 29 June , your 0800 zone time fix gives you a position of LAT 26°16.0'S, LONG 61°04.0'E. Your vessel is steaming a course of 079°T at a speed of 15.5 knots. An observation of the Sun's upper limb is made at 0905 zone time, and the observed altitude (Ho) is 25°20.1. The chronometer reads 05h 08m 12s, and the chronometer error is 02m 27s fast. Local apparent noon occurs at 1154 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 40°44.2'. Determine the vessel's 1200 zone time position.
Y a. LAT 26°02.0'S, LONG 62°05.0'E N b. LAT 26°02.0'S, LONG 62°23.2'E N c. LAT 26°05.1'S, LONG 62°06.3'E N d. LAT 25°56.0'S, LONG 62°03.0'E 1105: On 28 May , your 0200 DR position is LAT 19°16.5'S , LONG 119°24.0'W. You are on course 107°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0034
Y a. LAT 19°43.0'S, LONG 117°54.0'W N b. LAT 19°48.2'S, LONG 118°04.5'W N c. LAT 20°07.5'S, LONG 117°32.0'W N d. LAT 20°17.1'S, LONG 118°06.0'W 1124: The Vicksburg Gage reads 31.9 feet. The high point on your towboat is 43 feet above the water. What is the vertical clearance as you pass under the Vicksburg Highway 80 Bridge?
N a. 36.2 feet Y b. 41.4 feet N c. 58.0 feet N d. 84.3 feet 1165: Which of the following statements concerning the buoys on the Mississippi River is TRUE?
N a. The position of river buoys can be determined by consulting the latest Light List - Vol. V. N b. A preferred channel mark is a lateral mark indicating a channel junction which must always be passed to starboard. N c. Buoys should be passed as close as possible. Y d. Setting a buoy is the act of placing a buoy on assigned position in the water. 1210: It is 19 October and you are keeping +4 zone time. You are on course 275°, speed 16 knots. Your 0800 DR position is LAT 25°34.0'N, LONG 74°36.0'W. What is the second estimate of the time of LAN by ship's clocks?
N a. 11h 48m 38s N b. 12h 04m 49s Y c. 12h 49m 10s N d. 13h 48m 36s 1217: It is 31 October , and you are keeping zone time -12. You are on course 095°T, speed 24 knots. Your 0730 DR position is LAT 29°20.0'N, LONG 178°54.0'E. What is the time of the second estimate of LAN by ship's clocks?
N a. 11h 24m 19s Y b. 11h 40m 55s N c. 12h 12m 16s N d. 12h 40m 02s 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 1541: At 0119, on 10 September, you pass Springfield Bend Lt. (mile 244.8 AHP) and estimate the current will average 2.5 mph for the remainder of your trip. What is your ETA at the mouth of the Ohio River if you are making turns for 8.5 mph?
N a. 1746, 12 September N b. 1244, 13 September Y c. 2329, 14 September N d. 0210, 15 September 1803: As you approach Shreves cut-off you see Red River Landing Gage (mile 302.4 AHP) which reads 4.2 feet. The Low Water Reference Plane (LWRP) is 10.6 feet. Which of the following statements is TRUE?
N a. This reading is 6.4 feet above the Low Water Reference Plane. N b. A vessel drawing 8 ft would be able to pass over the sill at Old River Lock Y c. This reading is 6.4 feet below the Low Water Reference Plane. N d. A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River. 1807: As you approach Hole in the Wall Light (mile 373.4 AHP),
what type of daymark would you see on the light structure?
Y a. Green square N b. Green diamond N c. Red diamond N d. Red square 1878: On 13 September , your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observe a faint unidentifiable star through a hole in the clouds. The star bore 132.3°T at a sextant altitude (hs) of 29°34.6'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?
Y a. Beta Gruis N b. Sigma Capricorni N c. Scheat N d. Alpha Indi 1954: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks?
Y a. 1444, 27 Aug N b. 2214, 27 Aug N c. 0844, 28 Aug N d. 1454, 28 Aug 2090: At your current speed of 17 knots you only have enough fuel remaining to travel 316 miles. You must travel 622 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
Y a. 12.1 N b. 13.3 N c. 14.5 N d. 15.7 2092: At your current speed of 23 knots you only have enough fuel remaining to travel 386 miles. You must travel 785 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 19.3 N b. 17.7 Y c. 16.1 N d. 14.5 2105: You are southeast of Saybrook Breakwater Light passing Saybrook Bar Lighted Bell Buoy "8". This buoy marks __________.
Y a. shoal water N b. a tide rips area N c. the junction with the Connecticut River N d. a sunken wreck 2157: On 25 May , your vessel's 1917 zone time position is LAT 24°16.0'N, LONG 017°26.0'W. At that time a sextant observation of the planet Saturn was made. The sextant altitude is 63°05.1', and the chronometer reads 08h 18m 24s. The index error is 4.5' off the arc, and the chronometer error is 01m 05s fast. Your height of eye is determined to be 62.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 143.8° Y b. 147.3° N c. 148.7° N d. 149.9° 2158: On 26 May , your vessel's 1906 zone time position is LAT 27°16.0'N, LONG 24°37.0'W. At that time, a sextant observation of the planet Jupiter was made. The sextant altitude is 63°27.6', and the chronometer reads 09h 05m 16s. The index error is 5.2' on the arc, and the chronometer error is 01m 25s slow. Your height of eye is determined to be 52.6 feet. What is the (Zn) of this sight using the assumed position?
N a. 011.3°T Y b. 168.7°T N c. 191.3°T N d. 348.7°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. 2424: As you approach mile 225 AHP, you notice on the map a brown broken-lined rectangular shaped area along the bank. This indicates __________.
N a. weirs N b. a revetment Y c. a fleeting area N d. utility crossing 2463: You have steamed 491 miles at 20 knots and burning 568 barrels of fuel per day. You must decrease your consumption to 265 barrels per day with 313 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 10.9 N b. 14.3 Y c. 17.1 N d. 18.2 2655: You are steering 078°T, and a light is picked up dead ahead at a distance of 15.6 miles at 2316. You change course to pass the light 4.5 miles off abeam to port. If you are making 17 knots, what is your ETA at the position 4.5 miles off the light?
N a. 0006 Y b. 0009 N c. 0012 N d. 0015 2697: You are underway on course 106°T at a speed of 15.3 knots.
You sight a buoy bearing 109°T at a radar range of 3.6 miles at 1725. If you change course at 1728, what is the course to steer to leave the buoy abeam to port at 0.5 mile?
N a. 100°T N b. 117°T Y c. 120°T N d. 125°T 2704: You are underway on course 340°T at a speed of 14.8 knots.
You sight a buoy bearing 342°T at a radar range of 4.8 miles at 1422. If you change course at 1428, what is the true course to steer to leave the buoy abeam to port at 1.0 mile?
N a. 327°T N b. 354°T N c. 357°T Y d. 001°T 2869: Your vessel is on a course of 237°T at 18 knots. At 0404 a light bears 263.5°T, and at 0430 the light bears 282°T. At what time and at what distance off will your vessel be when abeam of the light?
N a. 0448, 6.8 miles N b. 0452, 7.2 miles Y c. 0456, 7.8 miles N d. 0500, 8.4 miles 3088: If the pitch of the propeller is 21.5 feet, and the revolutions per day are 96,666, calculate the day's run allowing 9% negative slip.
N a. 311.1 miles N b. 341.8 miles N c. 357.9 miles Y d. 372.6 miles 3276: While steaming at 15 knots, your vessel burns 326 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 12.2 knots?
Y a. 175 bbls/day N b. 215 bbls/day N c. 277 bbls/day N d. 300 bbls/day 3317: Your vessel consumes 156 barrels of fuel per day at a speed of 13.0 knots. What will be the fuel consumption of your vessel at 16.0 knots?
N a. 192 bbls N b. 236 bbls Y c. 291 bbls N d. 315 bbls 3627: Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?
N a. 242°T N b. 244°T N c. 246°T Y d. 248°T 3648: The true course between two points is 312°. Your gyrocompass has an error of 3°W. You make an allowance of 4° leeway for a west by south wind. What gyro course should be steered to make the true course good?
N a. 305°pgc Y b. 311°pgc N c. 315°pgc N d. 318°pgc 3752: While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyro compass and the charted value of the range of lights is 359°T, what is the gyro compass error?
Y a. 2°W N b. 2°E N c. 1°E N d. 1°W 10501: At 0939 your GPS position is LAT 36°57.0'N, LONG 75°41.0'W. You are on course 119° per standard magnetic compass at a speed of 12.8 knots. At 1017 your GPS indicates your position as LAT 36°54.2'N, LONG 75°33.1'W. What were the set and drift?
N a. 280°T at 1.0 knot Y b. 275°T at 1.8 knots N c. 091°T at 1.6 knots N d. 103°T at 1.1 knots 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 13210: At 0943, your position is LAT 41°14.8'N, LONG 71°54.3'W. You are turning for 12.2 knots. What is your ETA at the entrance to Great Salt Pond on Block Island?
Y a. 1054 N b. 1048 N c. 1040 N d. 1032 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 14304: What is a characteristic of light No. "41" on the Columbia River above Bonneville Lock?
N a. The light shows an isophase characteristic. N b. The light is 3 meters above the water. Y c. The light is equipped with a radar reflector. N d. The light is red in color. 15216: Which of the following concerning Thimble Shoal Channel is TRUE?
N a. Only deep-draft passenger ships and large naval vessels may use the main channel. N b. The channel is 14.5 miles in length. Y c. A tow drawing 20 feet is excluded from the main channel. N d. Thimble Shoal Channel is in international waters. 15316: What speed have you made good from 1710 to 1810?
N a. 4.2 knots N b. 4.9 knots N c. 5.5 knots Y d. 6.3 knots 15414: At 2100, you have passed through the Chesapeake Bay Bridge and Tunnel and determine your position to be LAT 37°01.3'
N, LONG 76°03.0'W. The current is flooding in a direction of 303°T at 2.5 knots. Adjusting your course for set and drift, which course would you steer while turning RPMs for 6 knots to make good a course of 175°T?
Y a. 156°T N b. 164°T N c. 183°T N d. 190°T 15438: At 2038 you are on course 272°T when Chesapeake Light is bearing 348° true at a range of 5.3 nm
Based on this fix, which statement is TRUE?
Y a. You are inside a ten fathom depth curve. N b. You are less than five miles from Chesapeake Light. N c. You are 0.6 mile north of a wreck. N d. You are inside the contiguous zone. 15616: At 2037, you change course to make good a course of 016°T.
There is no current, but a westerly wind is causing 3°
leeway. What course per standard magnetic compass (psc)
should you steer to make good the course 016°T?
N a. 031°psc N b. 028°psc N c. 025°psc Y d. 022°psc 15616: At 2037, you change course to make good a course of 016°T.
There is no current, but a westerly wind is causing 3°
leeway. What course per standard magnetic compass (psc)
should you steer to make good the course 016°T?
N a. 031°psc N b. 028°psc N c. 025°psc Y d. 022°psc 15657: What was the course made good from 0630 to 0654?
N a. 078°T Y b. 082°T N c. 086°T N d. 090°T 15762: What is the course per standard magnetic compass between points "A" and "B"?
N a. 090.5° N b. 093.0° N c. 095.5° Y d. 098.5° 16018: At 0550, engineering repairs are complete and speed is increased to 9.6 knots. At 0630, Falkner Island Light bears 023°pgc and Horton Point Light bears 097°pgc. From your 0630 fix you steer to make good a course of 086°T while turning for 9.6 knots. At 0700, Falkner Island Light bears 336.0°pgc and Horton Point Light bears 105.5°pgc. The radar range to the south tip of Falkner Island is 5.7 miles. Which statement is TRUE?
N a. Your course made good from 0630 to 0700 was 082°T. N b. The speed made good from 0630 to 0700 was 10.1 knots. N c. The current from 0630 to 0700 was 279°T at 0.6 knot. Y d. You are making good your intended speed. 16341: At 2230 you take the following visual bearings:
Montauk Point Light, Long Island 317°pgc
Southeast Point Light, Block Island 009°pgc
What is your position?
N a. LAT 40°51.2'N, LONG 71°35.9'W N b. LAT 40°51.5'N, LONG 71°36.4'W N c. LAT 40°52.2'N, LONG 71°36.6'W Y d. LAT 40°52.0'N, LONG 71°37.4'W 16411: 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?
N a. 074°pgc N b. 076°pgc N c. 078°pgc Y d. 080°pgc