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.
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) 237: At 0845, you are on a course of 097°T, and Townshend Ledge Buoy "10A" is close abeam to port. With a westerly current of 1.2 knots, what speed will you have to turn for from your 0845 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030?
N a. 12.1 knots Y b. 10.9 knots N c. 9.7 knots N d. 8.5 knots 352: What is the approximate distance to New Bedford, MA, from your 0530 DR position, if your 0352 position was 7 miles from Bridgeport, CT?
N a. 122 miles N b. 115 miles Y c. 104 miles N d. 95 miles 383: From point "A", you lay out an intended track line to a point where Block Island North Light bears 180°T at 2.9 miles (Point "B"). What is the length of this leg of the voyage?
Y a. 24.4 miles N b. 23.9 miles N c. 23.7 miles N d. 20.4 miles 392: A vessel at LAT 32°14.7'N, LONG 66°28.9'W, heads for a destination at LAT 36°58.7'N, LONG 75°42.2'W. Determine the true course by Mercator sailing.
N a. 058.2°T N b. 235.2°T Y c. 301.8°T N d. 348.3°T 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 497: At 0845, Montauk Pt. Light is bearing 205°T at a radar distance of 6.6 miles. What is your speed made good from your 0815 position?
N a. 10.5 knots N b. 10.0 knots N c. 9.2 knots Y d. 8.4 knots 571: At 0845, you are approaching the entrances to Thimble Shoal Channel. What channel must you use?
N a. The South Auxiliary Channel or Thimble Shoal Channel, but you must remain on the right hand side of the channel. Y b. The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters) and you are not a passenger vessel. N c. The North Auxiliary Channel since you are going to turn to a northerly heading near buoy "12". N d. You are not permitted to use any of the channels, but must remain outside the buoyed channel line. 700: Which facility is located on the right descending bank at mile 363.6 AHP?
N a. River Cement Corps.. Y b. Vidalia Dock and Storage Co. N c. T.L. James N d. Bunge Corps.. 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 1091: On 10 August , your 0430 ZT position is LAT 29°56.7'S, LONG 139°11.0'E. Your course is 321°T, speed 18.2 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0500 running fix. NP-0021
N a. LAT 29°46.0'S, LONG 138°54.0'E Y b. LAT 29°49.2'S, LONG 138°57.0'E N c. LAT 29°56.0'S, LONG 139°03.8'E N d. LAT 30°07.5'S, LONG 138°55.2'E 1200: On 26 September , your 0830 DR position is LAT 26°04.0'N, LONG 129°16.0'W. Your vessel is on a course of 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1124 N b. 1128 N c. 1142 N d. 1146 1202: Your 0830 DR position is LAT 27°33'S, LONG 79°17'E. Your vessel is on a course of 066°T, at a speed of 19.5 knots. Determine the time of LAN on 10 December .
Y a. 1131 N b. 1136 N c. 1153 N d. 1215 1275: At 1730 zone time, on 3 March , your DR position is LAT 16°00'S, LONG 80°00'W. You are steering 000°T at a speed of 7.5 knots. What is the zone time of sunset?
N a. 1829 N b. 1834 Y c. 1843 N d. 1852 1302: From Baton Rouge to Cairo, what is the maintained minimum channel depth during low water?
Y a. 9 feet N b. 12 feet N c. 15 feet N d. 30 feet 1425: At 1227, on 19 October, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day?
N a. 5.2 mph N b. 5.6 mph N c. 5.9 mph Y d. 6.3 mph 1462: On 17 June , your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?
N a. 0.7°W Y b. 3.5°W N c. 3.7°E N d. 2.3°E 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 1842: What town is located at mile 389.8 AHP?
N a. Whitehall N b. Belmont N c. St. James Y d. Rodney 1866: 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 019.0°T at a sextant altitude (hs) of 53°56.2'. 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?
N a. Phecda N b. Mimosa N c. Gamma Ursae Minoris Y d. Mizar 2012: On 24 March , your vessel is enroute from Cadiz to Norfolk. Evening twilight will occur at 1830 zone time, and your vessel's DR position will be LAT 35°06'N, LONG 60°48'
W. Considering their azimuth, altitude, and magnitude,
which group of stars is best suited for plotting a star fix at star time?
N a. Adhara, Rigel, Suhail N b. Regulus, Denebola, Alkaid N c. Adhara, Procyon, Alphard Y d. Sirius, Dubhe, Mirfak 2051: On which map would you find Redman Point, Arkansas?
N a. 23 Y b. 20 N c. 17 N d. 5 2119: At 1622 ZT, on 15 June , in DR position LAT 10° 15.2' N, LONG 135° 10' W, you observe an amplitude of the Moon. The center of the Moon is on the visible horizon, bearing 101.2°psc. The variation is 5° E. What is the deviation?
Y a. 1.5°E N b. 1.5°W N c. 0.5°E N d. 0.5°W 2171: On 8 August , at 0545 ZT, morning stars were observed, and the vessel's position was determined to be LAT 26°16.0'
S, LONG 94°16.0'E. Your vessel is steaming at 20.0 knots on a course of 346°T. A sextant observation of the Sun's lower limb is made at 0905 ZT. The chronometer reads 03h 02m 52s, and the sextant altitude (hs) is 38°07.5'. The index error is 5.2' off the arc, and the chronometer error is 2m 17s slow. Your height of eye on the bridge is 72 feet (22.0 meters). What is the observed altitude (Ho) and azimuth (Zn) of this sight using the assumed position?
Y a. 38°19.4', 048.4°T N b. 38°19.4', 131.6°T N c. 38°54.9', 048.4°T N d. 38°54.9', 131.6°T 2212: At 1650 you decrease speed to make good 7.1 mph. At 2020 you are __________.
Y a. abeam of Old River Control Structure Light N b. entering the Vicksburg District of the U.S. Army Corps. of Engineers N c. at Palmetto Point N d. at Latitude 31°10'N 2284: You observe the lower limb of the Sun at a sextant altitude (hs) of 35°26.3' on 25 June . The index error is 1.5' on the arc. The height of eye is 58 feet (17.6 meters). What is the observed altitude (Ho)?
N a. 35°28.2' N b. 35°29.9' Y c. 35°32.1' N d. 35°36.7' 2333: You observe the lower limb of the Sun at a sextant altitude (hs) of 37°47.2' on 11 October . The index error is 3.0' off the arc. The height of eye is 63 feet (19.2 meters). What is the observed altitude (Ho)?
N a. 37°25.2' N b. 37°42.5' N c. 37°51.5' Y d. 37°57.5' 2586: At 2100 Branford Reef Light bears 347°psc and Falkner Island Light bears 059°psc. You also get a radar range of 5.3 miles from Branford Reef Light. What are your LORAN readings?
N a. 14994.0, 26473.0, 43982.0 N b. 14994.5, 26482.0, 43982.0 Y c. 14996.0, 26477.5, 43981.0 N d. 14997.5, 26479.5, 43981.0 2665: You are on course 079°T, speed 11.2 knots. At 0904 you see a daymark bearing 078°T at a range of 4.6. If you change course at 0910 to leave the daymark abeam to starboard at 0.5 mile, at what time will the daymark be abeam?
N a. 0918 N b. 0923 Y c. 0928 N d. 0935 2690: While on a course of 066°pgc, a light bears 13° on the port bow at a distance of 12.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to port?
N a. 067°pgc Y b. 072°pgc N c. 079°pgc N d. 085°pgc 3280: While steaming at 14.5 knots, your vessel consumes 319 barrels of fuel oil per day. In order to reduce consumption to 217 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 9.8 knots N b. 11.9 knots Y c. 12.8 knots N d. 13.5 knots 3292: Your vessel consumes 215 barrels of fuel per day at a speed of 18.0 knots. What will be the fuel consumption of your vessel at 14.0 knots?
N a. 67 bbls Y b. 101 bbls N c. 130 bbls N d. 167 bbls 3471: You are underway on course 172°T at 18.5 knots. The current is 078°T at 2.8 knots. What is the speed being made good?
Y a. 18.5 knots N b. 19.0 knots N c. 19.5 knots N d. 20.0 knots 3602: You are heading 328°pgc to make good a course of 332°T, allowing 3° leeway for westerly winds and 1°E gyro error. The variation is 17°E. What should your heading be by standard magnetic compass to make good 332°T.
DEVIATION TABLE
MAGNETIC HEADING DEV.
345° 1°E
330° 1°W
315° 3°W
Y a. 315°psc N b. 318°psc N c. 343°psc N d. 345°psc 3610: While enroute from Sydney to the Panama Canal a vessel's true course is 071°. Variation is 14°E. Deviation is 4°W. A northerly breeze causes 2° leeway. What course would you steer psc in order to make good the true course?
Y a. 059°psc N b. 061°psc N c. 063°psc N d. 079°psc 3765: Your vessel is proceeding up a channel steering on a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 249°T, and the variation is 14°E. If the heading of your vessel at the time of the sighting is 226° per standard magnetic compass, what is the correct deviation?
N a. 5°E N b. 5°W Y c. 9°E N d. 9°W 11013: What will be the height of the tide at Horton Pt., New York, on 16 June 1983, at 1845 DST (ZD +4)?
N a. 0.2 foot Y b. 2.7 feet N c. 4.1 feet N d. 5.5 feet 11103: Point Judith Harbor of Refuge (LAT 41°22'N, LONG 71°30'W) __________.
N a. is used only by tows N b. has moorings for small craft along the breakwater N c. is easily entered in all sea conditions Y d. is entered through either the East Gap or the West Gap 11503: At 1016 your GPS position is LAT 41°07.6'N, LONG 71°37.9'W. At 1104 your position is LAT 41°00.2'N, LONG 71°29.4'W. What was the true course made good between the two positions?
N a. 134°T Y b. 139°T N c. 143°T N d. 145°T 11702: You are eastbound in the Thimble Shoal Channel. What is the true heading to steer if the engines are turning for 9.5 knots, the current is 110°T at 1.2 knots, and a southerly wind causes 3° of leeway?
Y a. 111° N b. 108° N c. 105° N d. 100° 12301: You are on course 055° per standard magnetic compass when you sight Block Island Southeast Point Light in line with the Block Island Aero Beacon bearing 319° per standard magnetic compass. Based on this you __________.
N a. should use 4°W deviation on true courses of 040° N b. know the compass error is 19°W Y c. know the deviation table is correct for that heading N d. should apply 4°W deviation to all bearings 12506: You are on course 203° per standard magnetic compass when you take the following bearings: New Point Comfort Spit Light 2 267°psc Horn Harbor Entrance Light HH 304°psc Wolf Trap Light 006°psc What is the position of the fix?
N a. LAT 37°18.9'N, LONG 76°10.4'W Y b. LAT 37°18.8'N, LONG 76°10.8'W N c. LAT 37°18.7'N, LONG 76°11.1'W N d. LAT 37°18.5'N, LONG 76°10.7'W 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 13705: The broken magenta lines (long and short dashes) in and around Mobjack Bay (LAT 37°20'N, LONG 76°22'W) indicate __________.
N a. amphibious training areas N b. grounds for dredge spoil Y c. fish trap areas N d. gunnery exercise areas 13707: The level of mean high water at Old Point Comfort is how many feet above the sounding datum?
N a. 1.5 feet N b. 2.2 feet Y c. 2.5 feet N d. 3.5 feet 14003: At 1430 your vessel passes under the Interstate 5 highway bridge east bound. Your engines are making RPM's for 12 mph. If the current is ebbing at 3 mph, what is your ETA at Bonneville Lock?
N a. 1744 N b. 1753 N c. 1834 Y d. 1848 15063: At 0830, you want the latest weather forecasts for the Falkner Island area. On what frequency do you set your FM radio for this information?
N a. 2182 kHz N b. 162.80 Mhz N c. 156.65 Mhz Y d. 162.55 Mhz 15165: At 2000, your position is LAT 37°04.1'N, LONG 76°05.6'W. You change course for the Eastern Shore. At 2037, Old Plantation Flats Light bears 033°pgc, and York Spit Light bears 282°pgc. The course made good from your 2000 position was __________.
Y a. 006°T N b. 014°T N c. 020°T N d. 028°T 15440: Your ETA at Chesapeake Bay Bridge and Tunnel between trestles B + C is 2300. If your engine speed is 9.8 knots,
what will be your approximate speed over the ground, at that time, allowing for the predicted current?
N a. 7.0 knots N b. 8.2 knots N c. 11.4 knots Y d. 12.5 knots 15628: The Natchez Gage reads 20.6 feet. The high point on your towboat is 47 feet above the water. What is the vertical clearance as you pass under the Natchez Highway Bridge?
Y a. 58.0 feet N b. 64.1 feet N c. 72.5 feet N d. 78.6 feet 15830: The black broken-line marking, across the river, that appears at mile 952.1 AHP represents a __________.
Y a. utility crossing N b. railroad N c. submarine crossing N d. revetment 15917: At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?
N a. 5.9 nm N b. 6.9 nm N c. 12.0 nm Y d. 12.8 nm 16020: If visibility permits, Orient Point Light will break the horizon at a range of about __________.
N a. 9.3 miles N b. 10.8 miles Y c. 13.9 miles N d. 17.0 miles 16246: From your 2259 fix, you alter course to 250°T. At 2300 Cape Henry Light bears 250°T. At 2326 Cape Henry Light bears 252°T. Which statement is TRUE?
N a. You are being set to the right. N b. The bearing change should be expected as you transit the inbound lane. Y c. You should alter course to starboard. N d. You should slow to reduce the effect of the current. 16445: At 1126 you take the following set of bearings:
Chesapeake Litght bears 142° true
Cape Henry Light bears 225° true.
What was the current encountered since your 1042 fix?
N a. Set 276°, Drift 0.5 knot N b. Set 276°, Drift 0.7 knot N c. Set 096°, Drift 0.5 knot Y d. Set 096°, Drift 0.7 knot 16614: Branford Reef is __________.
Y a. completely submerged at all stages of the tide N b. a hard sand shoal N c. surrounded by rocks awash at low water spring tides N d. a small, low, sandy islet surrounded by shoal water 16742: At 2352 you hear a MAYDAY call from a vessel reporting her position as 1.5 miles due east of Block Island Southeast Point Light. What is the course to steer, per gyrocompass to the distress site, if you change course at midnight and allow 1° leeway for easterly winds?
N a. 049.5°pgc N b. 052.5°pgc N c. 055.5°pgc Y d. 059.0°pgc