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.
56: The Red River Landing Gage reads 5.2 feet. The Low Water Reference Plane for the Red River is 10.6 ft. Which of the following statements is TRUE?
N a. The depth over revetment at Old River is 25.2 feet. Y b. River level is below the Low Water Reference Plane. N c. The depth over Old River Lock sill is greater than 11 ft. N d. This gage reading is at a higher elevation than the same reading on the Gage at Head of Passes. 57: At 0922, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 8.0 mph, what is the current?
N a. 7.0 mph N b. 2.0 mph N c. 1.4 mph Y d. 1.0 mph 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 121: As you approach Casting Yard Dock Lt. (mile 265.4 AHP) you notice on the map a circle with 2 black sectors. This symbol indicates a __________.
N a. lock N b. warning sign N c. mooring buoy Y d. river gage 184: At 1930, your position is LAT 37°16.7'N, LONG 75°37.7'W. The depth of water is approximately __________.
N a. 40 feet (12.2 meters) Y b. 50 feet (15.2 meters) N c. 60 feet (18.3 meters) N d. 70 feet (23.2 meters) 219: At 1630, you reach point A and come right to 204°T. Your engine speed is 12 knots. Your 1715, position is LAT 37°09.8'N, LONG 75°37.4'W. The current was __________.
Y a. 067°T at 1.4 knots N b. 246°T at 1.0 knots N c. 067°T at 1.0 knots N d. 246°T at 1.4 knots 239: What do the dotted lines around Goose Island and Kimberly Reef represent?
Y a. Depth contours N b. Breakers N c. Limiting danger N d. Tide rips 242: At 1210, you are in position LAT 41°14.3'N, LONG 72°16.5'W. What is the depth of water below your keel?
N a. 92 feet (28.0 meters) Y b. 97 feet (29.4 meters) N c. 108 feet (32.7 meters) N d. 115 feet (35.0 meters) 400: Your vessel receives a distress call from a vessel reporting her position at LAT 5°24'N, LONG 31°16'W. Your position is LAT 2°39'S, LONG 39°24'W. Determine the distance from your vessel to the vessel in distress by Mercator sailing.
N a. 669.3 miles Y b. 688.7 miles N c. 699.2 miles N d. 712.9 miles 451: Determine the great circle distance and initial course from LAT 27°51.0'N, LONG 71°41.0'W to LAT 49°45.0'N, LONG 06°14.0'W.
N a. 3196 miles, 313.1°T Y b. 3214 miles, 046.9°T N c. 3219 miles, 042.5°T N d. 3231 miles, 041.4°T 519: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?
N a. 227°psc N b. 233°psc N c. 258°psc Y d. 262°psc 631: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?
N a. 38.5 feet (11.7 meters) N b. 43.5 feet (13.2 meters) N c. 51.0 feet (15.5 meters) Y d. 59.5 feet (18.0 meters) 1002: On 13 November , your 1030 ZT DR position is LAT 19°03'S, LONG 6°34'E. You are on course 164°T, speed 12 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1112 351°55.4' S 18°00.4' 88°08.0'
1121 354°10.4' S 18°00.5' 88°33.9'
Y a. LAT 19°22.3'S, LONG 6°37.8'E N b. LAT 19°20.1'S, LONG 6°41.4'E N c. LAT 19°17.6'S, LONG 6°39.2'E N d. LAT 19°15.8'S, LONG 6°36.8'E 1181: On 4 January , your 0800 zone time DR position is LAT 25°25.0 S, LONG 16°09.0'W. Your vessel is on course 290°T at a speed of 13.5 knots. What is the zone time of local apparent noon (LAN)?
N a. 1157 N b. 1205 N c. 1209 Y d. 1213 1203: You are keeping ZD +4 on your vessel. On 21 June ,
at 0906 DST, your position is LAT 30°48.0'N,
LONG 71°00.0'W. You are on a course of 167°T at 15.2 knots. At what time will local apparent noon (LAN) occur ZT at your vessel? You are keeping DST.
N a. 1145 N b. 1202 N c. 1218 Y d. 1245 1257: On 5 May , your 1300 ZT DR position is LAT 25°16.0'S, LONG 12°30.0'W. You are on course 012°T at a speed of 14 knots. What will be the zone time of sunset at your vessel?
N a. 1702 Y b. 1719 N c. 1730 N d. 1741 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 1267: On 10 December , your 1300 zone time (ZT) DR position is LAT 26°27.0'S, LONG 79°04.0'E. You are on course 068°T at a speed of 14 knots. What will be the zone time of sunset at your vessel?
Y a. 1824 N b. 1846 N c. 1854 N d. 1908 1342: What is the vertical clearance between the highest point of your towboat, if it is 45 feet above the water, and if the Natchez Gage reads 23.4 feet when passing under the Natchez-Vidalia Westbound Highway Bridge?
N a. 67.5 feet Y b. 57.1 feet N c. 52.2 feet N d. 45.2 feet 1408: The horizontal clearance of the center span on the Baton Rouge RR and Highway 190 Bridge is __________.
N a. 443 N b. 500 Y c. 623 N d. 748 1415: The highest point on your towboat is 52 feet above the water, and the Helena Gage reads +9.6 feet. What will be the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
N a. 49.8 feet N b. 53.9 feet Y c. 57.8 feet N d. 73.1 feet 1483: On 31 May , your vessel's 1420 zone time DR position is LAT 29°06'N, LONG 120°06'W, when an azimuth of the Sun is observed. The bearing of the Sun per standard magnetic compass was 255.3°. The chronometer time of the observation is 10h 17m 24s. The chronometer error is 02m 32s slow. The variation for this area is 12.9°E. What is the deviation of the standard magnetic compass?
Y a. 2.5°W N b. 2.9°W N c. 2.9°E N d. 3.2°E 1545: You are downbound, passing by Warfield Point Lt. (mile 537 AHP), when you observe on your Mississippi River map several black lines extending into the river from the bank. These indicate __________.
N a. revetments N b. weirs N c. fleeting areas Y d. dikes 1654: On 28 September , in DR position LAT 27°16.7'S, LONG 113°27.2'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 273°psc. The chronometer reads 01h 17m 26s and is 01m 49s slow. Variation in the area is 6°W. What is the deviation of the standard magnetic compass?
N a. 0.2°W Y b. 0.4°E N c. 0.6°W N d. 0.8°E 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 1688: As you approach Ashland Light (mile 378.1 AHP), which type of daymark would you see on the light structure?
N a. Green square N b. Green triangle N c. Red diamond Y d. Red triangle 1779: At 2237 ZT, on 14 July , in DR position LAT 33°57'N, LONG 150°32'W you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 258.6°psc. The variation is 14°E. What is the deviation?
Y a. 2.0°W N b. 1.0°W N c. 0.0° N d. 1.0°E 1801: What is the distance from the Amoco Docks at Baton Rouge, LA, to the new mouth of the White River?
N a. 981.5 miles N b. 953.5 miles Y c. 345.3 miles N d. 700.2 miles 1873: On 12 June , your 1845 DR position is LAT 21°47'N,
LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 174.0°T at a sextant altitude (hs) of 18°58.6'. The index error is 0.5°
on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
Y a. Muhlifain N b. Alpha Hydri N c. Almak N d. Alpha Muscae 1895: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 195°T at an observed altitude (Ho) of 03°30.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?
Y a. Peacock N b. Schedar N c. Ankaa N d. Alioth 2210: The low water reference plane (LWRP) for Bayou Sara is 5.25 feet. If the Bayou Sara Gage reads -0.5 feet, what is the water level in relation to the low water reference plane?
N a. 4.75 feet above the plane N b. 5.75 feet above the plane Y c. 5.75 feet below the plane N d. 4.75 feet below the plane 2294: You are passing Eastwood Lt. (mile 849.3 AHP) and the map indicates that Bunge Grain facility would be located at the square with number __________.
N a. 4 N b. 6 N c. 8 Y d. 10 3080: If the speed necessary for reaching port at a designated time is 21.6 knots and the pitch of the propeller is 22.5 feet, how many revolutions per minute will the shaft have to turn, assuming a 2% positive slip?
N a. 81 N b. 87 N c. 95 Y d. 99 3296: Your vessel consumes 199 barrels of fuel per day at a speed of 14.5 knots. What will be the fuel consumption of your vessel at 10.0 knots?
Y a. 65 bbls N b. 95 bbls N c. 137 bbls N d. 148 bbls 3298: Your vessel consumes 216 barrels of fuel per day at a speed of 15.0 knots. What will be the fuel consumption of your vessel at 17.5 knots?
N a. 232 bbls N b. 252 bbls N c. 294 bbls Y d. 343 bbls 3302: You have steamed 132 miles and consumed 14.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 289 miles?
N a. 21.6 tons N b. 24.5 tons N c. 27.9 tons Y d. 30.7 tons 3463: You are underway on course 215°T at 12 knots. The current is 000°T at 2.3 knots. What is the course made good?
N a. 209°T N b. 217°T Y c. 222°T N d. 232°T 3615: You want to make good a true course of 137°. A north-northeast wind produces a 3° leeway. The variation is 11° west, deviation is 5° east, and gyrocompass error is 2° east. What course must you steer per gyrocompass to make the true course good?
Y a. 132°pgc N b. 134°pgc N c. 136°pgc N d. 138°pgc 10700: At 1020 your position is LAT 41°11.0'N, LONG 71°50.0'W. You are on course 056° per standard magnetic compass at 9.2 knots. At 1112 your position is LAT 41°15.9'N, LONG 71°41.7'W. What were the set and drift?
N a. 130°T at 0.9 knot Y b. 141°T at 1.2 knots N c. 331°T at 0.8 knot N d. 346°T at 1.1 knots 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 11800: What is the course to steer between Port Jefferson Approach buoy "PJ" and New Haven Lighted Buoy "NH"? Your engine speed is 12 knots and you allow for a current of 93°T at 0.8 knot. A NW'ly wind causes 3° leeway.
Y a. 030°T N b. 034°T N c. 037°T N d. 044°T 12709: You are on course 157° per standard magnetic compass when you take the following bearings: Little Gull Island Light 276°psc Race Rock Light 301°psc Latimer Reef Light 028°psc What is your position?
N a. LAT 41°13.5'N, LONG 71°57.9'W Y b. LAT 41°13.5'N, LONG 71°57.4'W N c. LAT 41°13.6'N, LONG 71°57.0'W N d. LAT 41°13.6'N, LONG 71°57.8'W 12906: At 0919 you are in Chesapeake Channel between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel. What is your ETA between York River Entrance Channel Buoys "17" and "18" if you are making 11.3 knots?
N a. 1034 N b. 1039 Y c. 1044 N d. 1049 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 15318: You passed Cape Henry Light at 0730 outbound at maximum flood. What approximate current can you expect on entering Chesapeake Channel?
N a. Slack before ebb N b. Slack before flood N c. Ebb current Y d. Flood current 15340: At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°
T. At 1750 Race Rock Light bears 336°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?
N a. 245°T at 0.9 knots N b. 245°T at 1.7 knots Y c. 065°T at 1.7 knots N d. 065°T at 0.9 knots 15561: At what time will you cross the 60 foot curve if you make good 12 knots?
Y a. 0527 N b. 0534 N c. 0541 N d. 0544 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 15743: At 2155 Montauk Point Light bears 249°T, Watch Hill Point Light bears 335°T, and Block Island North Light bears 045°
T. At this time, you wish to change course to 288°T. The current has a set of 355°T and a drift of 2.0 knots. If your vessel is turning RPM's for 9 knots, what course must you steer in order to make your desired course good?
Y a. 276°T N b. 280°T N c. 284°T N d. 288°T 15857: You are southeast of Saybrook Breakwater Light passing a horizontally-banded buoy. This buoy marks __________.
N a. a sunken wreck N b. a tide rips area N c. the junction with the Connecticut River Y d. shoal water 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 16046: The visibility is excellent. When Race Rock Light Tower breaks the horizon, how far will you be from the Tower?
N a. 8.5 miles N b. 9.6 miles N c. 14.0 miles Y d. 17.9 miles 16259: You are on track from the anchorage to point A. At 0250, Great Machipongo Inlet Light "5" (37°21.8'N, 75°43.7'W) bears 279°pgc. At 0320, the light bears 320°pgc. What is the position of your 0320 running fix if you are making good 6.5 knots?
Y a. LAT 37°18.10'N, LONG 75°39.55'W N b. LAT 37°18.10'N, LONG 75°39.30'W N c. LAT 37°18.00'N, LONG 75°39.75'W N d. LAT 37°17.95'N, LONG 75°39.95'W 16416: At 1345, you depart from a position 1 mile due east of Montauk Point Light and set course for Block Island Southeast Light at 9 knots. At 1430 your position is Latitude 41° 06.3' North Longitude 071° 41.9' West
What was the current encountered since 1345?
N a. Set 015°, drift 0.5 knot Y b. Set 195°, drift 0.5 knot N c. Set 015°, drift 0.7 knot N d. Set 195°, drift 0.7 knot 16511: At 0728, you change course to 080°T. When steady on course, the standard magnetic compass reads 097°. Which statement is TRUE?
N a. The gyro course is 083°pgc. N b. The magnetic heading is 090°. N c. The deviation is 1.0°E. Y d. The magnetic compass error is 17°W.