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.
49: As you pass under the Greenville Highway Bridge, you estimate the current as 4.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph?
Y a. 13.5 mph N b. 14.5 mph N c. 15.5 mph N d. 16.5 mph 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 250: At 0045, you obtain the following information:
Radar range to Inlet Point is 1.4 miles;
Radar range to Rocky Point is 2.8 miles.
Radar range to Horton Point is 2.8 miles.
What were the set and drift between 0005 and 0045?
N a. 275°true, 0.9 knot N b. 275°true, 1.4 knots Y c. 095°true, 1.4 knot N d. 095°True, 0.9 knots 258: During twilight on 28 December , about 1800 GMT, in DR position LAT 4°00'N, LONG 0°06'W, the sextant altitude (hs) of Venus was 30°46.8'. The height of eye was 36 feet, and the index error was 2.0' on the arc. The temperature was 68°F. The barometer read 1030 mb. Calculate the observed altitude (Ho).
N a. Ho 30°35.2' N b. Ho 30°37.1' Y c. Ho 30°38.1' N d. Ho 30°40.3' 278: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?
Y a. 162.55 MHz N b. 162.85 MHz N c. 181.15 MHz N d. 202.35 MHz 324: The mean high water level at Old Point Comfort is __________.
N a. 3.3 feet (1.1 meters) Y b. 2.6 feet (0.8 meters) N c. 1.2 feet (0.4 meters) N d. 0.0 344: The maximum ebb current at a location 4.3 miles south of Stratford Point will occur at 0413. The predicted current will be 1.0 knot at 075°. What will be your course made good if you steer 082°T at 8 knots?
N a. 087°T N b. 085°T N c. 083°T Y d. 081°T 432: Which chart would you use for more detailed information on New Haven Harbor?
Y a. 12371 N b. 12370 N c. 12372 N d. 12373 508: Branford Reef is __________.
N a. a hard sand shoal marked with a light Y b. completely submerged at all stages of the tide N c. surrounded by rocks awash at low water spring tides N d. a small, low, sandy islet surrounded by shoal water 544: From your 0600 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0 miles if a southerly wind is producing 3° of leeway?
N a. 262°pgc N b. 258°pgc N c. 256°pgc Y d. 252°pgc 613: On 21 November, at 2100 zone time, you depart LAT 32°12.0'N, LONG 69°26.0'W enroute to LAT 12°05.0'N, LONG 7°32.0'W. The distance is 3,519 miles, and the average speed will be 12.5 knots. What is the zone time of arrival?
N a. 1330, 3 December N b. 1530, 3 December Y c. 1830, 3 December N d. 1530, 4 December 629: You are on a voyage from Belem, Brazil, to Mobile, AL. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate a layover in San Juan, Puerto Rico, of 17.5 hours. If you took departure at 2200 (ZD +3h 30m), 26 February , what was your ETA (ZD +6) at Mobile?
N a. 1900, 8 March Y b. 2200, 8 March N c. 0400, 9 March N d. 2200, 9 March 1001: On 26 July , your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1228 50°23.5' N 19°21.9' 88°14.3'
1236 52°23.5' N 19°21.8' 88°29.0'
N a. LAT 18°00.9'N, LONG 51°31.9'W N b. LAT 18°03.5'N, LONG 51°36.2'W Y c. LAT 18°07.2'N, LONG 51°30.4'W N d. LAT 18°10.6'N, LONG 51°25.1'W 1010: On 8 February , your 0800 zone time position is LAT 21°55'S, LONG 52°27'W. Your vessel is on course 056°T at a speed of 17.5 knots. An observation of the Sun's lower limb is made at 0938 zone time, and the observed altitude (Ho) is 46°06.5'. The chronometer reads 12h 37m 23s, and the chronometer error is 1m 24s slow. LAN occurs at 1243 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 83°56.1'. Determine the vessel's 1200 zone time position.
N a. LAT 20°57.0'S, LONG 51°21.5'W N b. LAT 20°58.0'S, LONG 51°25.5'W N c. LAT 21°04.0'S, LONG 51°12.0'W Y d. LAT 21°04.0'S, LONG 51°21.5'W 1125: Where would you find out which buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP)?
Y a. Local Notice to Mariners N b. Bulletin board at the Rosedale Gage N c. Waterways Journal N d. None of the above 1411: After you get underway, what is the first river gage you will pass?
N a. Head of Passes N b. Baton Rouge Y c. Bayou Sara N d. Red River Landing 1423: You pass Ratcliff Light (mile 289.8) at 1650. What was your average speed since leaving Baton Rouge?
N a. 7.3 mph Y b. 7.6 mph N c. 8.0 mph N d. 8.3 mph 1750: In addition to the Army Corps. of Engineers maps, data on bridge clearances may be found in the __________.
N a. Army Corps. of Engineers Regulations Y b. Light List N c. Waterways Journal N d. Channel Report 1763: At 2126, you pass Morganza Bend Light (mile 278.4 AHP).
At 0226, 4 January, you pass Red River Landing Gage (mile 302.4 AHP). You have been turning for 7.5 mph. What is the current?
N a. 1.4 mph N b. 1.8 mph Y c. 2.7 mph N d. 6.2 mph 1951: As you approach Ashland Light (mile 378.1 AHP) which daymark would you see?
Y a. Red triangle N b. Red diamond N c. Green square N d. Green diamond 2156: At 1300 ZT, on 9 May , your DR position is LAT 24°00'N, LONG 83°26'W. Determine the computed altitude (Hc) of the Sun for the assumed position (AP) nearest to the above given latitude and longitude, given a chronometer time of 07h 00m 00s.
N a. Hc 68°22.8' N b. Hc 68°24.1' N c. Hc 68°25.2' Y d. Hc 68°26.6' 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 2161: On 28 April , your vessel's 0515 zone time position is LAT 23°26'S, LONG 95°30'E. At this time, the observed altitude (Ho) of the star Rigil Kentaurus is 24°51.4'. Your chronometer reads 11h 16m 36s and is 01m 18s fast. What is the intercept (a) based on the assumed position method?
N a. 30.9 miles N b. 32.3 miles N c. 33.1 miles Y d. 34.4 miles 2169: At 0600 ZT, on 24 July , your DR position is LAT 22°37'N, LONG 32°45'W. You are steering 185°T at a speed of 20.0 knots. Determine the computed altitude (Hc) and azimuth (Zn) for an observation of the Sun's lower limb taken at 1030 ZT. At this time the chronometer reads 00h 30m 16s and is 0m 31s slow.
N a. Hc 64°27.5' Zn 092.3° N b. Hc 64°30.8' Zn 090.1° Y c. Hc 64°41.7' Zn 087.8° N d. Hc 64°44.2' Zn 094.7° 2179: On 22 June , at 0906 EDT (ZD +4), your position is LAT 24°36'N, LONG 69°30'W. You are on course 165°pgc at a speed of 14.8 knots. A sextant observation of the Sun's lower limb is made, and the sextant altitude (hs) is 42°44.0' with an index error of 0.8' off the arc. At this time the chronometer reads 01h 10m 12s, and is 2m 42s slow. If your height of eye is 70 feet, what is the azimuth (Zn) of the sight using the assumed position?
Y a. Zn 080.4° N b. Zn 081.6° N c. Zn 129.0° N d. Zn 130.5° 2283: You observe the lower limb of the Sun at a sextant altitude (hs) of 22°58.6' on 16 June . The index error is 2.0' off the arc. The height of eye is 61 feet. What is the observed altitude (Ho)?
Y a. 23°06.7' N b. 23°09.9' N c. 23°15.4' N d. 23°22.2' 2659: You are steering 115°T, and a light is picked up dead ahead at a distance of 16.7 miles at 0522. You change course to pass the light 3.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 3.5 miles off the light?
Y a. 0644 N b. 0647 N c. 0650 N d. 0653 3061: The propeller on a vessel has a diameter of 20.2 feet and a pitch of 19.0 feet. What would be the apparent slip if the vessel cruised 367 miles in a 24 hour day (observed distance) at an average RPM of 84?
Y a. +2.9% N b. -2.9% N c. +5.2% N d. -5.2% 3065: The propeller on your vessel has a pitch of 18'09". If the observed distance for a day's run was 399.4 miles and the average RPM was 86, which statement is TRUE?
N a. The slip is a positive 5%. N b. The day's run by engine RPM was 404.5 miles. Y c. The slip is a negative 5%. N d. The day's run by engine RPM was 390.6 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 3278: While steaming at 14 knots, your vessel burns 276 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 11.7 knots?
N a. 135 bbls/day Y b. 161 bbls/day N c. 196 bbls/day N d. 245 bbls/day 3311: You have steamed 162 miles and consumed 14.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 285 miles?
Y a. 24.6 tons N b. 34.7 tons N c. 43.3 tons N d. 54.8 tons 3630: You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 183°psc Y b. 189°psc N c. 210°psc N d. 223°psc 3751: While proceeding up a channel on course 010° per gyro compass, you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check of the chart shows the range to be 009°T and the variation to be 15°W. If the ship's course is 026°psc, what is the deviation for the present heading?
Y a. 2°W N b. 2°E N c. 1°W N d. 1°E 10106: What is the course per standard magnetic compass from Chesapeake Light to North Chesapeake Entrance Lighted Whistle Buoy NCA?
N a. 316°psc Y b. 321°psc N c. 323°psc N d. 326°psc 10611: You are off the coast of Mexico and are taking a time tick for 1800. At approximately 1754, 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 06h 00m 07s. When compared to the chronometer, the comparing watch reads 06h 01m 24s, and the chronometer reads 05h 59m 23s. What is the chronometer error?
N a. 0m 07s fast N b. 1m 17s fast N c. 0m 37s slow Y d. 1m 54s slow 11012: Which statement is FALSE with regard to Plum Island Harbor West Dolphin Light?
N a. The light is maintained from sundown to 0130 daily. Y b. The light is white. N c. The light is maintained by the U.S. Dept. of Agriculture. N d. The light is located on a dolphin. 11403: At 2115 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 0015 your position is LAT 41°03.3'N, LONG 72°37.9'W. What was your true course made good?
N a. 062°T N b. 076°T Y c. 245°T N d. 259°T 11803: What is the true course to steer between Falkner Island Light and Horton Point Light, if the set and drift of the current are 041° at 2.4 knots, and a northeasterly wind will cause 4° of leeway? Your engines are making turns for 15 knots.
N a. 116°T N b. 124°T Y c. 134°T N d. 142°T 12700: You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc Race Rock Light 289°psc What is your position?
N a. LAT 41°13.6'N, LONG 71°54.6'W N b. LAT 41°13.7'N, LONG 71°53.8'W N c. LAT 41°13.7'N, LONG 71°54.9'W Y d. LAT 41°13.8'N, LONG 71°54.3'W 13503: You are proceeding from a point 4 miles due east of Montauk Point enroute to Long Island Sound via The Race. You should expect the soundings to __________.
N a. remain fairly constant N b. increase rapidly at first then remain constant until through the Race Y c. start increasing when north of Montauk Point N d. be inaccurate due to sound absorption by the mud bottom 15308: From your 0315 position, what time can you expect to reach York Spit Channel Buoys "37" and "38"?
Y a. 0405 N b. 0412 N c. 0417 N d. 0423 15439: What is your ETA off Chesapeake Bay Entrance Buoy "CB" at the entrance to the inbound lane of the traffic separation scheme?
Y a. 2058 N b. 2104 N c. 2109 N d. 2115 15518: From your 1930 position, you plot a course to pass 0.5 mile due south of Race Rock Light. If your vessel's speed is 10.0 knots, the current's set and drift are 040°T at 1.8 knots, and a north wind produces a 3° leeway, what true course should you steer to make good your desired course?
N a. 275°T Y b. 280°T N c. 290°T N d. 294°T 15620: From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 13 knots, at what time should you arrive at Crisfield, MD?
N a. 2359 Y b. 0037 N c. 0112 N d. 0148 15706: 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°07.4'W Y c. LAT 41°04.7'N, LONG 73°07.2'W N d. LAT 41°04.8'N, LONG 73°07.0'W 15839: From your 2000 position you change course to 206°T. What time would you expect to be abeam of Hog Island Buoy "12"?
N a. 2021 Y b. 2026 N c. 2031 N d. 2040 16239: From your 2045 position, you set a course to pass 1.5 miles due east of the charted position of Hog Island Lighted Bell Buoy "12". The known set and drift in the area are 068°T at 3 knots. What is the course to steer, with no change in engine speed, to make good your desired course?
Y a. 200°T N b. 203°T N c. 206°T N d. 209°T 16310: At 0730, your position is LAT 41°10.5'N, LONG 72°32.2'W. From this position you steer course 286°psc with an engine speed of 9.0 knots. What is the approximate depth of water under your keel?
Y a. 52 feet (15.8 meters) N b. 57 feet (17.3 meters) N c. 62 feet (18.8 meters) N d. 67 feet (20.3 meters) 16506: At 0630, you pass Buoy "PI" close abeam on the starboard side. You are steering 078°T and are headed directly toward Race Rock Light. At 0654, Little Gull Island Light is bearing 207°T and Race Rock Light is bearing 072°T. What is your 0654 position?
Y a. LAT 41°14.0'N, LONG 72°05.3'W N b. LAT 41°14.2'N, LONG 71°54.6'W N c. LAT 41°14.4'N, LONG 72°06.8'W N d. LAT 41°19.0'N, LONG 72°05.2'W 16719: You are bound for New London. Where will you cross the demarcation line and be governed by the Inland Rules of the Road?
N a. You are already governed by the Inland Rules. Y b. In the Race N c. Above the Thames River Bridge N d. You will not be governed by the Inland Rules. 16841: At 0907 you change course to 224°T, and your speed is now 13.0 knots. At 0939 Chesapeake Light is bearing 168°T at a distance of 7.1 miles, and Cape Henry Light is bearing 246°T. What were the set and drift since 0907?
N a. 326°T at 0.7 knot N b. 326°T at 1.4 knots Y c. 146°T at 1.4 knots N d. 146°T at 0.7 knots