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.
120: You estimate the current as 2.5 mph. What is the speed over the ground?
N a. 5.5 mph Y b. 6.0 mph N c. 8.0 mph N d. 11.0 mph 127: After entering Milliken Bend (mile 455 AHP) you wish to locate the river service in Madison Parish, Louisiana. The river service is indicated by the square containing which number?
N a. 7 N b. 6 N c. 5 Y d. 4 239: 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 290: What was the speed made good from 1845 to 1930?
N a. 6.2 knots N b. 6.8 knots N c. 7.5 knots Y d. 8.3 knots 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 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 368: You will enter waters governed by the International Rules when __________.
N a. you cross the territorial sea boundary line N b. abeam of buoy "CBJ" Y c. Cape Charles Light bears 022°T N d. you cross the boundary of the contiguous zone 381: At 1540, your position is LAT 37°18.4'N, LONG 76°10.5'W. Which course should you steer per gyrocompass to head for the entrance to Cape Charles City?
Y a. 129°pgc N b. 123°pgc N c. 117°pgc N d. 109°pgc 428: At 0730, visibility is 5.5 miles. At what time will you lose sight of Horton Point Light?
N a. It is not visible at 0730 N b. 0733 Y c. 0751 N d. 0812 460: Determine the great circle distance and initial course from LAT 35°27.0'N, LONG 140°20.5'E to LAT 47°51.0'N, LONG 122°51.0'W.
N a. 4087 miles, 036°T Y b. 4115 miles, 045°T N c. 4122 miles. 076°T N d. 4136 miles, 076°T 490: At 0728, you change course to 080°T. When steady on course, the standard magnetic compass reads 097°. Which statement is TRUE?
Y a. The magnetic compass error is 17°W. N b. The magnetic heading is 090°. N c. The deviation is 1.0°E. N d. The gyro course is 083°pgc. 504: At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?
N a. _ . N b. _ _ N c. . . Y d. . _ 654: In planning a North Pacific voyage, you wish to steam the minimum distance from LAT 48°30'N, LONG 124°45'W to LAT 44°00'N, LONG 150°00'E, while remaining south of 51°N latitude. Which track meets these requirements? (Use gnomonic tracking chart WOXZC 5270)
N a. A Mercator sailing from departure to the mid-longitude at 51°N, thence great circle to arrival N b. A great circle between departure and arrival with parallel sailing between the longitudes where the great circle intersects 51°N N c. A great circle tangent to 51°N from departure to the mid-longitude then a great circle to arrival Y d. A great circle from departure to LAT 51°N, LONG 148°W, parallel sailing to LAT 51°N, LONG 171°W, then a great circle to arrival 673: You estimate the current at 2.0 mph. What is the speed over the ground?
N a. 3.5 mph N b. 4.5 mph Y c. 5.5 mph N d. 9.5 mph 808: On 28 July , your 0800 zone time fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1149 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the calculated latitude at LAN?
N a. 26°21.9'N N b. 26°23.4'N Y c. 26°25.0'N N d. 26°27.7'N 809: On 7 November , your 0830 zone time fix gives you a position of LAT 27°36.0'N, LONG 163°19.0'W. Your vessel is on course 289°T, and your speed is 19.0 knots. Local apparent noon (LAN) occurs at 1138 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 45°35.0'. What is the calculated latitude at LAN?
N a. 27°52.3'N N b. 27°53.4'N N c. 27°55.1'N Y d. 27°57.2'N 812: On 28 July , your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?
N a. 26°25.0'N Y b. 26°27.6'N N c. 26°29.8'N N d. 26°32.0'N 1009: On 22 February , your 0800 zone time position is LAT 24°16'S, LONG 95°37'E. Your vessel is on course 126°T at a speed of 14 knots. An observation of the Sun's lower limb is made at 0945 zone time. The chronometer reads 03h 47m 22s, and the chronometer error is 02m 37s fast. The observed altitude (Ho) is 57°02.1'. LAN occurs at 1148 zone time, and a meridian altitude of the Sun's lower limb is made. The observed meridian altitude (Ho) is 75°22.3'.
Determine the vessel's 1200 zone time position.
N a. LAT 24°49.3'S, LONG 96°24.0'E N b. LAT 24°49.3'S, LONG 96°27.2'E Y c. LAT 24°52.2'S, LONG 96°24.0'E N d. LAT 24°52.2'S, LONG 96°27.2'E 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 1133: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 53.0 feet N b. 62.6 feet N c. 64.2 feet Y d. 68.0 feet 1193: On 26 September , your 0830 zone time DR position is LAT 23°04.0'N, LONG 129°16.0'E. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1158 N b. 1205 Y c. 1210 N d. 1214 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. 1251: On 16 August , your 1600 ZT DR position is LAT 26°17.0'N, LONG 165°17.0'E. You are on course 301°T at a speed of 15 knots. What will be the zone time of sunset at your vessel?
N a. 1827 N b. 1832 Y c. 1838 N d. 1845 1303: On which map would you find Redman Point, Arkansas?
Y a. 20 N b. 38 N c. 45 N d. 60 1749: Which light characteristics does Black Hawk Light (mile 318.3 AHP) have?
N a. 1 red flash every 4 seconds N b. 1 green flash every 4 seconds Y c. 1 white flash every 4 seconds N d. 2 white flashes every 5 seconds 1857: On 22 May , your 0437 ZT DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 097°T at an observed altitude (Ho) of 48°20.0'. The chronometer reads 07h 40m 40s and is 03m 24s fast. What star did you observe?
Y a. Markab N b. Diphda N c. Sabik N d. Hamal 1863: On 14 January , your 1922 ZT DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 029°T, at an observed altitude (Ho) of 29°35.0'. The chronometer reads 03h 25m 43s and is 03m 15s fast. What star did you observe?
Y a. Elnath N b. Fomalhaut N c. Pollux N d. Markab 1869: 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 282.5°T at a sextant altitude (hs) of 14°22.3'. 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. Wezen Y b. Alhena N c. Mirzam N d. Menkalinan 1878: On 13 September , your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observe a faint unidentifiable star through a hole in the clouds. The star bore 132.3°T at a sextant altitude (hs) of 29°34.6'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?
Y a. Beta Gruis N b. Sigma Capricorni N c. Scheat N d. Alpha Indi 1880: On 13 September , your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observed a faint unidentifiable star through a hole in the clouds. The star bore 265.0°T at a sextant altitude (hs) of 62°25.4'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?
N a. Sigma Ophiuchi N b. Alcyone Y c. Dschubba N d. Gamma Lupi 1887: On 8 April , your evening DR position is LAT 22°16.0'N, LONG 157°58.3'W. You observe an unidentified star bearing 271°T at an observed altitude (Ho) of 44°08.2'. The chronometer reads 05h 09m 57s, and is 01m 23s slow. What star did you observe?
N a. Betelgeuse Y b. Aldebaran N c. Alnilam N d. Bellatrix 1898: On 22 May , your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 142°T at an observed altitude (Ho) of 23°10.2'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?
N a. Markab N b. Diphda N c. Sabik Y d. Fomalhaut 2155: On 17 May , at 0501 zone time, morning stars were observed, and the vessel's position was determined to be LAT 22°16.0'S, LONG 103°46.0'W. Your vessel is steaming at 24.0 knots on a course of 301°T. A sextant observation of the Sun's lower limb is made at 0845 zone time. The chronometer reads 03h 43m 32s, and the sextant altitude is 28°24.7'. The index error is 1.5' off the arc, and the chronometer error is 02m 02s slow. Your height of eye on the bridge is 85.5 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 051.0°T Y b. 052.5°T N c. 054.2°T N d. 055.7°T 2658: You are steering 202°T, and a light is picked up dead ahead at a distance of 14.6 miles at 2234. You change course to pass the light 5 miles off abeam to starboard. If you are making 21 knots, what is your ETA at the position 5 miles off the light?
N a. 2310 Y b. 2313 N c. 2316 N d. 2319 2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?
N a. 035°pgc Y b. 043°pgc N c. 051°pgc N d. 059°pgc 2787: What is the length of the trip?
Y a. 1088.5 miles N b. 1332.2 miles N c. 1334.6 miles N d. 1566.4 miles 2878: Your vessel is steering 143°T at 16 knots. At 2147 a light bears 106°T, and at 2206 the same light bears 078°T. What will be your distance off abeam?
N a. 5.1 miles N b. 5.4 miles Y c. 5.9 miles N d. 6.5 miles 2891: You are steaming on course 168°T at a speed of 18 knots. At 1426 you sight a buoy bearing 144°T. At 1435 you sight the same buoy bearing 116°T. What is your distance off at the second bearing and predicted distance when abeam?
Y a. 2.3 miles 2nd bearing, 1.8 miles abeam N b. 2.5 miles 2nd bearing, 2.8 miles abeam N c. 2.8 miles 2nd bearing, 1.8 miles abeam N d. 3.3 miles 2nd bearing, 2.8 miles abeam 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% 3093: If the pitch of the propeller is 23.2 feet, and the revolutions per day are 94,910, calculate the day's run allowing 11% negative slip.
N a. 322.3 miles N b. 362.3 miles N c. 382.0 miles Y d. 402.0 miles 3462: You are underway on course 160°T at 10 knots. The current is 210°T at 0.9 knots. What is the course made good?
N a. 156°T N b. 160°T Y c. 164°T N d. 169°T 10302: Determine the course per standard magnetic compass from Cerberus Shoal Buoy 9 (LAT 41°10.4'N, LONG 71°57.1'W) to a position 0.2 mile south of Race Rock Light (LAT 41°14.6'N, LONG 72°02.8'W).
Y a. 326.5°psc N b. 324.0°psc N c. 298.5°psc N d. 296.0°psc 10304: Determine the course per standard magnetic compass from the entrance to Ninigret Pond (LAT 41°21.3'N, LONG 71°38.3'W) to the entrance to Great Salt Pond on Block Island.
N a. 192.0°psc Y b. 184.0°psc N c. 154.5°psc N d. 152.5°psc 11006: At what time will the first maximum flood occur 1 mile east of Old Field Point on 29 April 1983? (You are keeping daylight saving time ZD +4).
N a. 0957 N b. 1059 Y c. 1328 N d. 1423 11506: 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 1238 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the speed made good?
Y a. 8.2 knots N b. 8.6 knots N c. 8.9 knots N d. 9.2 knots 14004: At 1745 Lady Island Upper Range is in line dead astern and Washougal Lower Range is in line on the starboard bow. You are steaming in an easterly direction. What speed must you average to arrive abeam of Cape Horn Light No. 67 at 1839?
N a. 9.3 mph N b. 9.8 mph Y c. 10.2 mph N d. 10.8 mph 14202: What is the minimum clearance for the bridge across the entrance to the Wind River at Home Valley, WA.?
N a. 14 feet Y b. 26 feet N c. 34 feet N d. 38 feet 15458: You are delayed in sailing due to engineering problems. You get underway at 0630. A Coast Guard radio broadcast advises that an aircraft carrier will transit the Elizabeth River enroute Norfolk Naval Shipyard and a safety zone is in effect. Further information on how far you must remain from the carrier found is in __________.
N a. PUB 117 N b. Light List Y c. Coast Pilot N d. Chart Number 1 15515: You decide to use the 9960-Y and 9960-W rates. At 1915,
you obtain the following readings:
9960-Y-43936.0
9960-W-14653.3
What is your 1915 position?
N a. LAT 41°13.0'N, LONG 71°54.0'W N b. LAT 41°13.1'N, LONG 71°53.9'W N c. LAT 41°13.2'N, LONG 71°54.3'W Y d. LAT 41°13.2'N, LONG 71°53.7'W 15710: From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 3°
leeway. What course should you steer per standard magnetic compass in order to make good your true course?
N a. 118°psc Y b. 115°psc N c. 112°psc N d. 109°psc 15818: At 0300, your position is LAT 41°01.7'N, LONG 72°55.1'W. From this position you steer a course of 289° per standard magnetic compass at an engine speed of 10.0 knots. At what time can you first expect to see Stratford Shoal Middle Ground Light if the luminous range is 8.0 miles?
Y a. 0303 N b. 0309 N c. 0312 N d. 0318 16706: At 0520, you take the following observations:
Point Judith Light 032°pgc
Point Judith Harbor of Refuge
Main Breakwater Center Light 308°pgc
What is the position of your 0520 fix?
N a. LAT 41°20.8'N, Long 71°30.3'W Y b. LAT 41°20.8'N, Long 71°29.7'W N c. LAT 41°20.6'N, Long 71°30.0'W N d. LAT 41°20.5'N, Long 71°29.8'W