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.
65: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1202 x 84 feet N b. 1200 x 75 feet N c. 1195 x 75 feet Y d. 1190 x 75 feet 67: The Gage at Red River Landing reads 22.2 feet. The LWRP for Red River is 10.6 feet. What is the water level in relation to the low water reference plane?
N a. 32.8 ft below N b. 32.8 ft above N c. 11.6 ft below Y d. 11.6 ft above 69: Which type of daymark will you see as you approach Joe Pierce Light (mile 335.4 AHP)?
Y a. Red Triangle N b. Red square N c. Red diamond N d. Private aid - no daymark 96: As you approach Kate Aubrey Towhead Light (mile 789.5 AHP), your searchlight will show what type of marking at the light?
Y a. Green diamond N b. Red and green banded square N c. Green triangle N d. Green square 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 243: From your 1210 position, you are making good a course of 083°T. Your engines are turning RPMs for 10 knots. The set and drift of the current are 310° at 1.7 knots. At what time should you expect to enter the red sector of New London Harbor Light?
Y a. 1243 N b. 1254 N c. 1259 N d. 1305 267: At 0802, Branford Reef Light bears 348°T at 0.75 mile, and the north point of Falkner Island bears 088°T at 6.7 miles. What were the set and drift since 0740?
N a. Set 040°T, drift .2 knot N b. Set 220°T, drift .2 knot Y c. Set 220°T, drift .6 knot N d. You are making good your intended course and speed. 301: You depart LAT 28°55.0'N, LONG 89°10.0'W, enroute to LAT 24°25.0'N, LONG 83°00.0'W. Determine the true course and distance by mid-latitude sailing?
N a. 418 miles, 122°T Y b. 427 miles, 129°T N c. 436 miles, 133°T N d. 442 miles, 122°T 326: Your 0200 position is LAT 37°23.5'N, LONG 76°09.2'W. Your speed is 8 knots, and your course is 095°T. Which statement is TRUE?
N a. The depth of the water in your vicinity is about 38 to 40 fathoms (69.1 meters to 72.7 meters). N b. The closest major aid to navigation is New Point Comfort. Y c. You are less than a mile from a sunken wreck which could interfere with your tow. N d. You will pass through a disposal area on your present course. 362: At 0530, the Coast Guard announces that Chesapeake Channel is closed indefinitely due to a collision occurring in the channel between Trestle "B" and "C" of the Chesapeake Bay Bridge and Tunnel. You exit York Spit Channel, leaving buoy "20" abeam to port at 0.1 mile, and alter course to leave Horseshoe Crossing Lighted Bell Buoy abeam to port at 0.2 mile. What is the course per gyrocompass?
Y a. 193°pgc N b. 190°pgc N c. 187°pgc N d. 185°pgc 442: Shortly after getting underway, you sight Stonington Outer Breakwater Light in line with Stonington Inner Breakwater Light bearing 000° per gyrocompass. Which statement is TRUE?
N a. The deviation is 2°W N b. The variation is 2°E. N c. The compass error is 16°W. Y d. The gyro error is 2.5°W 457: Determine the great circle distance and initial course from LAT 31°57.0'S, LONG 115°52.0'E to LAT 24°47.0'N, LONG 66°59.0'E.
N a. 4516 miles, 134.5°T Y b. 4407 miles, 314.5°T N c. 4402 miles, 319.5°T N d. 4378 miles, 336.8°T 521: The coastline between Point Judith and Watch Hill is __________.
N a. steep with rocky bluffs Y b. sandy and broken by rocky points N c. low and marshy N d. heavily forested 577: 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 44 minutes Y b. 14 hours 38 minutes N c. 14 hours 30 minutes N d. 14 hours 22 minutes 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 1134: 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. 1463: On 26 May , your 0723 zone time DR position is LAT 24°50.0'N, LONG 38°11.0'W. At that time, you observe the Sun bearing 076.5°psc. The chronometer reads 10h 25m 43s, and the chronometer error is 02m 57s fast. The variation is 7°W. What is the deviation of the standard magnetic compass?
N a. 3.3°E N b. 3.7°W N c. 8.3°W Y d. 10.7°E 1468: On 17 April , your 1516 zone time DR position is LAT 27°24.0'N, LONG 115°24.0'E. At that time, you observe the Sun bearing 247°psc. The chronometer reads 07h 16m 26s, and the chronometer error is 00m 32s slow. The variation is 4.5°E. What is the deviation of the standard compass?
N a. 4.5°W Y b. 5.4°E N c. 6.2°E N d. 6.2°W 1500: On September 9 , your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error?
Y a. 0.7°E N b. 1.2°E N c. 0.8°W N d. 9.4°W 1667: On Sunday, 8 November, your ship is enroute from Texas City, TX, to Portland, ME. At 0632 ZT, you fix your position at LAT 27°06'N, LONG 90°36'W. When the lower limb of the Sun was two-thirds of a diameter above the visible horizon, the Sun bore 105° per standard magnetic compass. At this time the chronometer read 12h 39m 20s and is 3m 20s slow. If the variation is 3°E, determine the deviation of the standard compass.
Y a. 0.8°E N b. 0.8°W N c. 3.8°E N d. 3.8°W 1670: On 10 August , your vessel's 0426 zone time DR position is LAT 52°07'N, LONG 142°16'E, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 074.5° per standard compass. Variation in the area is 12°W. The chronometer reads 07h 24m 19s and is 02m 34s fast. Which of the following is the deviation of the standard compass?
N a. 0.0° N b. 1.3°W Y c. 1.3°E N d. 2.3°W 1753: The Bayou Sara Gage reads 5.25 feet. The low water reference plane (LWRP) for Bayou Sara is 5.25 feet. Which statement is TRUE?
N a. This gage reading is at a higher elevation than the same reading on the Gage at Head of Passes. N b. The depth over revetment at Old River is 25.2 ft. N c. The depth over Old River Lock sill is greater than 11 ft. Y d. River level is at the Low Water Reference plane 1958: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)?
Y a. Green square N b. Green triangle N c. Green diamond N d. Red square 2166: On 10 January , at 0550 ZT, morning stars were observed, and the vessel's position was determined to be LAT 25°16.0'N, LONG 123°18.0'W. Your vessel is steaming at 22.0 knots on a course of 295°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 02s, and the sextant altitude is 24°00.7'. The index error is 2.6' off the arc, and the chronometer error is 01m 34s slow. Your height of eye on the bridge is 55.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 127.8°T N b. 129.8°T Y c. 131.9°T N d. 133.6°T 2176: On 9 November , at 0426 ZT, your position was LAT 25°17.0'S, LONG 154°16.0'E. Your vessel is steaming at 14.0 knots on course 066°T. A sextant observation of the Sun's lower limb is made at 0837 ZT. The chronometer reads 10h 35m 21s, and the sextant altitude (hs) is 50°26.9'. The index error is 1.5' on the arc, and the chronometer error is 01m 48s slow. Your height of eye on the bridge is 56.0 feet. What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?
N a. 50°18.1', 086.3°T N b. 50°18.1', 093.7°T Y c. 50°33.5', 085.9°T N d. 50°33.5', 093.7°T 2203: You have orders to drop off the empties at the fleeting area at Cairo Point and add five loaded tank barges to your tow. If you are turning for 9 mph and estimate the current at 1.5 mph, what is your ETA at Cairo?
N a. 2210, 22 June N b. 1741, 22 June Y c. 1423, 22 June N d. 1031, 22 June 2247: At 1845 zone time, on 17 March , while taking stars for an evening fix, you observe an unidentified star bearing 200°T at an observed altitude of 53°45.0'. Your DR position at the time of the sight is LAT 25°10.0'N, LONG 66°48.0'W. The chronometer time of the sight is 10h 47m 49s, and the chronometer error is 1m 54s fast. Your vessel is steaming on a course of 290°T at a speed of 18.0 knots. What star did you observe?
N a. Altair N b. Mirfak N c. Pollux Y d. Rigel 2671: While on a course of 349°T, a light bears 13° on the starboard bow at a distance of 10.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to starboard?
N a. 346°T Y b. 349°T N c. 352°T N d. 355°T 2699: You are underway on course 137°T at a speed of 16.2 knots. You sight a rock bearing 134°T at a radar range of 4.6 miles at 1508. If you change course at 1514, what is the course to steer to leave the rock abeam to port at 1.5 miles?
Y a. 162°T N b. 158°T N c. 154°T N d. 151°T 3054: The propeller on a vessel has a diameter of 22.8 feet and a pitch of 19.3 feet. What would be the apparent slip if the vessel cruised 287 miles in a 24 hour day (observed distance) at an average RPM of 67?
N a. -6.3% Y b. +6.3% N c. -24.0% N d. +24.0% 3084: If the speed necessary for reaching port at a designated time is 18.6 knots, and the pitch of the propeller is 26.2 feet, how many revolutions per minute will the shaft have to turn, assuming a 4% negative slip?
Y a. 69 N b. 72 N c. 75 N d. 78 3269: Your vessel arrives in port with sufficient fuel to steam 812 miles at 15 knots. If you are unable to take on bunkers, at what speed must you proceed to reach your next port, 928 miles distant?
N a. 13.6 knots Y b. 14.0 knots N c. 15.3 knots N d. 15.7 knots 3611: The track line on the chart is 274°T. Variation is 4°E, and deviation is 2°E. The gyro error is 1.5°E. What course would be steered by gyrocompass to make good the desired course?
N a. 280.5°pgc N b. 278.0°pgc N c. 275.5°pgc Y d. 272.5°pgc 3755: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 186°T, and the variation is 11°W. If the heading of your vessel at the time of the sighting is 193° per standard magnetic compass, what is the correct deviation?
Y a. 4°E N b. 4°W N c. 7°E N d. 7°W 10908: What is the velocity of the first maximum flood current in Lynnhaven Roads on 23 July 1983?
Y a. 0.4 knot N b. 0.5 knot N c. 0.8 knot N d. 1.3 knots 11109: What is the velocity of the maximum ebb current approximately 1.1 miles ENE of Little Gull Island in the afternoon of 25 April 1983?
Y a. 5.5 knots N b. 4.7 knots N c. 4.2 knots N d. 1.3 knots 11509: At 1014 you depart the entrance to Lake Montauk with light "1" close aboard. Your course is 066° per standard magnetic compass, and the speed is 8.6 knots. At 1232 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the course made good?
N a. 036°T Y b. 040°T N c. 044°T N d. 047°T 12208: You sight Stratford Pt. Light in line with the Igor I. Sikorsky Airport Aero Beacon bearing 319° per standard magnetic compass. What is the compass error?
N a. 4°E N b. 10°W N c. 14°E Y d. 18°W 12302: You are on course 203° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 194° per standard magnetic compass. Based on this you __________.
N a. know the correct deviation is 3°W Y b. should swing your vessel to check the deviation table N c. should apply 15°W compass error to all compass readings N d. know you are steering a true course of 185° 13409: You plan to anchor your vessel at LAT 41°00.5'N, LONG 73°02.8'W. What type of bottom should you expect at this position?
N a. Gray sand Y b. Soft mud N c. Hard sand N d. Gray mud 14517: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.)
N a. 2239 N b. 2255 N c. 2315 Y d. 2344 15061: Falkner Island Light is shown __________.
N a. 46 feet (13.9 meters) above sea level N b. only from 1 June to 10 October Y c. from a white octagonal tower N d. with a six-second period 15213: At 2015, your vessel is at the Chesapeake Bay Bridge and Tunnel midway between buoys "13" and "14". If the height of tide is -1 foot (-0.3 meters), what is the approximate depth of water?
Y a. 53 feet (15.5 meters) N b. 46 feet (13.9 meters) N c. 40 feet (12.1 meters) N d. 35 feet (10.6 meters) 15362: The south shore of Long Island Sound near your position is __________.
N a. marked by gradual shoaling N b. low and marshy N c. backed by marshes and wooded uplands Y d. bluff and rocky 15612: At 1920, Cape Henry Light bears 225°pgc, and Chesapeake Channel Tunnel North Light bears 288°pgc. If your heading is 268°T, what is the relative bearing of Chesapeake Light?
N a. 194° N b. 205° Y c. 213° N d. 220° 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 15819: You must arrive at your final destination by 0800. The distance from your 0300 position to the final destination is 40.5 miles. What minimum speed must be made good to arrive on time?
Y a. 8.1 knots N b. 8.5 knots N c. 9.3 knots N d. 9.6 knots 16010: The characteristic of Branford Reef Light is __________.
N a. flashing red every 4 seconds N b. flashing red every 3 seconds Y c. flashing white every 6 seconds N d. flashing yellow every 4 seconds 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. 16070: When exiting Thimble Shoal Channel bound for Norfolk, the track line based on the lights of the Norfolk Entrance Reach Range is __________.
N a. 220°T N b. 222°T Y c. 224°T N d. 228°T 16642: Based on your 0500 fix, which statement is TRUE?
N a. You are seaward of the 120 fathom curve. N b. The course made good between 0445 and 0500 was 345°T. Y c. You should alter course to port to clear Southwest Ledge Shoal. N d. A radar contact bearing 020°T at 4.8 miles is buoy "2A".