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.
40: Which of the following statements regarding aids to navigation shown in the Army 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. N b. Buoy positions as shown on the chart are exact. Y c. Buoys should always be given as wide a berth as possible. N d. Lights and daymarks are always shown in their exact location. 125: 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 194: At 2100, you alter course to 250°T and reduce speed to 7 knots. You enter the traffic separation scheme on the inbound side. At 2200, your fix shows you crossing a broken purple line on the chart, and you observe North Chesapeake Entrance Lighted Gong Buoy "NCD" to port. This area is __________.
N a. an area with local magnetic disturbances N b. a pilotage area Y c. a precautionary area centered on buoy "CBJ" N d. in inland waters 277: What chart should you use after you enter New London Harbor?
N a. 13211 N b. 13214 Y c. 13213 N d. 13272 348: At 0430, you take the following radar ranges:
Stratford Point Light @ 5.25 nm
Middle Ground Light @ 4.55 nm
What is your 0430 position?
N a. LAT 41°08.9'N, LONG 73°00.0'W N b. LAT 41°05.0'N, LONG 73°01.1'W Y c. LAT 41°05.8'N, LONG 73°00.8'W N d. LAT 41°06.5'N, LONG 73°01.4'W 349: From your 0430 position, what is the course per standard magnetic compass to a position where Twenty-eight foot Shoal lighted buoy "TE" is abeam to port at 1 mile?
Y a. 101.5° N b. 098.0° N c. 086.0° N d. 082.5° 385: At 0715 you take the following bearings:
Race Rock Light 328°pgc
Little Gull Island Light 249°pgc
Mt. Prospect Antenna 036°pgc
Based on your 0715 fix, which statement is TRUE?
N a. You are governed by the Inland Rules. N b. Your fathometer reads about 265 fathoms. N c. You are in a cable area. Y d. You are to the left of your track line. 395: A vessel at LAT 45°36.0'N, LONG 11°36.0'W, heads for a destination at LAT 24°16.0'N, LONG 73°52.0'W. Determine the true course and distance by Mercator sailing.
Y a. 247°T, 3299.3 miles N b. 247°T, 3951.6 miles N c. 251°T, 3298.5 miles N d. 251°T, 3951.6 miles 542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?
N a. 63°00.6' Y b. 63°01.5' N c. 63°02.9' N d. 63°04.1' 542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?
N a. 63°00.6' Y b. 63°01.5' N c. 63°02.9' N d. 63°04.1' 576: What is indicated by the dashed magenta line crossing York Spit Channel between buoys "20" and "22"?
N a. You are crossing the demarcation line between the COLREGS and the Inland Rules. N b. The line indicates a submarine cable, and you should not anchor in the area. Y c. The line marks the limits of a regulated area. N d. It marks the range between Ft. Wool Light and Cape Charles Harbor Range, Rear Light. 746: On 16 January , at 1804 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 36°12'N, LONG 124°36'W, and your sextant reads (hs) 37°16.4'. Your chronometer reads 02h 02m 12s, and is 01m 36s slow. Your height of eye is 60 feet, and the index error is 1.5' on the arc. From your observation of Polaris, what is the latitude of your vessel?
N a. 36°12.6'N N b. 36°14.4'N Y c. 36°17.9'N N d. 36°20.2'N 819: On 27 March , in DR position LAT 32°31.0'N, LONG 76°25.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 05h 23m 32s, and the chronometer error is 01m 30s fast. The sextant altitude (hs) is 59°59.0'. The index error is 1.8' off the arc, and your height of eye is 52 feet. What is the latitude at meridian transit?
N a. LAT 32°21.6'N Y b. LAT 32°29.5'N N c. LAT 32°37.6'N N d. LAT 32°46.2'N 823: On 15 October , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1146 ZT. Your DR position is LAT 22°42.0'N, LONG 139°52.0'E, and your sextant altitude (hs) is 58°30.4'. The index error is 3.4' on the arc, and your height of eye is 56.7 feet. The chronometer time of the observation is 02h 45m 06s, and the chronometer error is 01m 06s slow. Find the latitude at meridian transit from the ex-meridian observation.
N a. LAT 22°29.1'N Y b. LAT 22°35.2'N N c. LAT 22°58.1'N N d. LAT 23°20.6'N 840: On 29 October , in DR position LAT 41°12.0'N, LONG 50°18.9'W, you take an ex-meridian observation of the Sun's lower limb, near upper transit. The chronometer time of the sight is 03h 21m 12s, and the chronometer error is 01m 50s slow. The sextant altitude (hs) is 34°54.2'. The index error is 2.0' on the arc, and your height of eye is 45 feet. What is the latitude at meridian transit?
N a. 41°12.0'N Y b. 41°16.0'N N c. 41°20.2'N N d. 41°23.6'N 1185: On 31 January , your 0920 zone time DR position is LAT 24°16.0'S, LONG 151°33.0'E. Your vessel is on course 258°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?
N a. 1202 N b. 1207 Y c. 1211 N d. 1215 1236: Which facility is located on the right descending bank at mile 363.6 AHP?
N a. River Cement Corps.. N b. Bunge Corps.. N c. T.L. James Y d. Vidalia Dock and Storage Co. 1278: On 17 April , your vessel is enroute from the Panama Canal to Kobe, Japan. Your 0400 zone time DR position is LAT 26°12.0'N, LONG 126°12.0'W. Your vessel is on course 285°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?
N a. 0535 N b. 0541 N c. 0552 Y d. 0602 1431: 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?
N a. 9.5 mph Y b. 13.5 mph N c. 14.5 mph N d. 16.5 mph 1477: On 27 June , your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?
N a. 1.5°E N b. 1.9°W Y c. 3.0°W N d. 3.0°E 1711: What is the length of the trip?
N a. 722.0 miles N b. 953.8 miles Y c. 1097.9 miles N d. 1332.1 miles 1769: In order to determine what buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP), what should you check?
N a. Bulletin board at the Rosedale Gage N b. Waterways Journal N c. Light List Y d. Notice to Mariners 1952: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light?
N a. Green triangle Y b. Green diamond N c. Green square N d. Red-and-green banded square 2054: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?
N a. 79.0 feet Y b. 71.7 feet N c. 65.2 feet N d. 59.1 feet 2093: At your current speed of 21 knots you only have enough fuel remaining to travel 435 miles. You must travel 755 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
Y a. 15.9 N b. 17.1 N c. 18.3 N d. 19.5 2111: According to the DR track line from your 0100 position, how far off Roanoke Point Shoal Buoy "5" should you be when the buoy is abeam?
N a. 0.2 mile Y b. 0.6 mile N c. 1.3 mile N d. 1.8 miles 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 2185: At 1000 ZT, on 21 October , your DR position is LAT 29°00'N, LONG 134°40'E. 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 01h 00m 00s.
N a. Hc 42°30.6' N b. Hc 42°32.1' N c. Hc 42°34.2' Y d. Hc 42°35.7' 2534: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
N a. 0557, April 19th N b. 1045, April 19th Y c. 1242, April 19th N d. 1733, April 19th 2691: While on a course of 159°T, a light bears 11° on the starboard bow at a distance of 10.6 miles. What course should you steer to pass 2 miles abeam of the light leaving it to starboard?
Y a. 159°T N b. 163°T N c. 167°T N d. 171°T 2717: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?
N a. 79.0 feet Y b. 71.7 feet N c. 65.2 feet N d. 59.1 feet 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 6844: At 1010 your vessel passes close abeam to Buoy "NCB" in the inbound traffic lane. At this time the Chesapeake Bay Pilot informs you that he will not board your vessel until 1100. The pilot boat is located 1.5 miles northeast of Cape Henry Light. What should you reduce your speed to in order to arrive at the pilot boat at this time?
N a. 5.9 knots N b. 7.5 knots Y c. 8.2 knots N d. 9.8 knots 10609: At 1922 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 10 knots. At 2019 your GPS position is 1 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift?
Y a. 343°T at 0.7 knot N b. 340°T at 1.2 knots N c. 164°T at 0.9 knot N d. 161°T at 1.1 knots 11108: The passage between Great Gull Island and Plum Island __________.
N a. is subject to weak and variable tidal currents N b. uncovers at extreme low water Y c. should be avoided N d. shows a whirlpool at maximum ebb current when accompanied by NW gales 13909: The irregular black line around a charted light such as Race Rock Light indicates that it is __________.
N a. unwatched Y b. surrounded by riprap N c. a minor light N d. constructed on an artificial island 15014: If you make good 12 knots, what is the ETA at North Chesapeake Channel Entrance Buoy "NCA" (LL #375)?
N a. 2116 Y b. 2111 N c. 2106 N d. 2101 15113: At 1845, you obtain the following bearings:
Old Plantation Flats Light bearing 251° true
New Point Comfort Light bearing 334° true
Your latitude is __________.
N a. 37°10.7'N N b. 37°10.9'N N c. 37°11.0'N Y d. 37°11.2'N 15160: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA"?
N a. 249.0°psc N b. 251.5°psc N c. 255.0°psc Y d. 257.0°psc 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 15667: At 0815, you change course to 079°T. To compensate for a southerly wind, you estimate a 3° leeway is necessary. Which course should you steer per standard magnetic compass to make good 079°T?
N a. 090°psc N b. 093°psc N c. 095°psc Y d. 099°psc 15669: The area between Block Island and Montauk Point that is bounded by dashed magenta lines is a __________.
N a. naval exercise area N b. fish trap area Y c. submerged cable area N d. restricted navigation area 15860: At 0100, your position is LAT 41°05.3 N, LONG 72°29.2 W. You head for the position one mile north of Mattituck Inlet Light and turn to make good 9.0 knots. If the visibility is about 2 miles, at what approximate time will you sight the light?
N a. The light is visible at 0100 N b. 0109 Y c. 0120 N d. 0128 16067: At 2118, you obtain the following information:
Cape Henry Light 151°pgc;
Cape Charles Light 033°pgc;
Thimble Shoal Light 291°pgc
What is your 2118 position?
Y a. LAT 36°57.4'N, LONG 76°01.9'W N b. LAT 36°57.5'N, LONG 76°01.4'W N c. LAT 36°57.6'N, LONG 76°01.8'W N d. LAT 36°57.6'N, LONG 76°02.2'W 16413: At 1104, Watch Hill Point Light is in line with Stonington Outer Breakwater Light, the range to the south tip of Watch Hill Point is 2.6 miles and the range to the beach is 1.9 miles. You are steering to make good 075°T, speed 10.0 knots. At 1110, you change course to head for a position of LAT 41°05.0'N, LONG 71°50.0'W. What is the true course?
N a. 185° N b. 187° Y c. 190° N d. 193° 16418: At 2100, you set course of 000°T, speed 10 knots from LAT 41°07.0'N, LONG 71°30.0'W. Visibility is 5.5 n.m. What is the earliest time you can expect to sight Point Judith Light? (Use charted range of 20 miles as nominal range.)
N a. The light is visible at 2100. Y b. 2114 N c. 2123 N d. 2131 16442: The area bounded by the buoys "C51" to "C47A" to "M6" to "M14", west of your anchorage, is __________.
N a. a training area for naval small craft N b. restricted to oil and mineral exploration N c. an anchorage for ammunition barges Y d. a fish trap area 16568: 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 8.0 knots, the current's set and drift are 040°T at 1.4 knots,
and a south wind produces a 3° leeway, what true course should you steer to make good your desired course?
Y a. 275°T N b. 280°T N c. 290°T N d. 294°T 16843: At what time will you enter the inbound traffic lane with Buoy "NCA" (LL #375) bearing 180°T at 0.3 mile?
N a. 1003 Y b. 0957 N c. 0951 N d. 0948