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.
87: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?
N a. 0821, 21 April Y b. 0028, 21 April N c. 1830, 20 April N d. 1445, 20 April 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 280: Your 1752 position places you __________.
N a. less than 0.5 mile eastward of York Spit Channel Y b. less than 0.5 mile westward of York Spit Channel N c. greater than 0.5 mile westward of York Spit Channel N d. greater than 0.5 mile eastward of York Spit Channel 300: 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. N b. Above the Thames River Bridge Y c. In the Race N d. You will not be governed by the Inland Rules. 314: At 1430, your position is LAT 37°12.8'N, LONG 76°17.7'W. At this time, you come left and steer 045°T. This course will lead you through a channel bordered by yellow buoys. The dashed magenta lines between the buoys mark __________.
N a. York River Entrance Channel Y b. Fish trap areas N c. the piloting channel for Mobjack Bay N d. New Point Comfort shoal area 336: What speed have you made good from 1710 to 1810?
Y a. 6.3 knots N b. 5.5 knots N c. 4.9 knots N d. 4.2 knots 407: You depart LAT 34°22'S, LONG 18°23'E, and steam 3174 miles on course 282°T. What is the longitude of your arrival by Mercator sailing?
Y a. LONG 40°33.5'W N b. LONG 40°19.5'W N c. LONG 40°18.2'W N d. LONG 40°17.3'W 436: At 0227, you take the following radar ranges and bearings: Bartlett Reef Light 359°T at 2.4 miles, Race Rock Light 083°T at 4.1 miles. What is your 0227 position?
N a. LAT 41°14.5'N, LONG 72°08.0'W Y b. LAT 41°14.1'N, LONG 72°08.2'W N c. LAT 41°14.0'N, LONG 72°08.5'W N d. LAT 41°14.3'N, LONG 72°08.5'W 485: Determine the great circle distance and initial course from LAT 08°53.0'N, LONG 79°31.0'W to LAT 33°51.5'S, LONG 151°13.0'E.
N a. 7809 miles, 247.0°T N b. 7763 miles, 247.0°T Y c. 7635 miles, 233.9°T N d. 7618 miles, 230.3°T 541: You depart LAT 16°24'S, LONG 169°38'W, for LAT 16°24'S, LONG 174°52'E. What are the course and distance by parallel sailing?
N a. 090°T, 301 miles N b. 090°T, 892 miles N c. 270°T, 301 miles Y d. 270°T, 892 miles 602: At 1845 zone time, on 24 October , you depart Bimini Island, LAT 25°50.0'N, LONG 77°00.0'W (ZD +5). You are bound for Bishop Rock, LAT 49°40.0'N, LONG 6°34.0'W, and you estimate your speed of advance at 13.6 knots. The distance is 3,491 miles. What is your estimated zone time of arrival at Bishop Rock?
N a. 0627, 3 November N b. 1642, 3 November N c. 0939, 4 November Y d. 1627, 4 November 736: On 6 March , your 1854 zone time DR position is LAT 23°51.5'N, LONG 73°14.0'W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 11h 52m 40s, and the chronometer error is 01m 56s slow. The index error is 5.0' on the arc, and the height of eye is 43.5 feet (13.3 meters.) What is your latitude by Polaris?
N a. 23°29.5'N Y b. 23°36.3'N N c. 23°49.9'N N d. 24°02.9'N 836: On 16 June , in DR position LAT 50°57.0'S, LONG 53°03.9'W (ZD+4), you take an ex-meridian observation of Acrux at lower transit. The chronometer time of the sight is 10h 08m 18s, and the chronometer error is 02m 12s fast. The sextant altitude (hs) is 23°49.0'. The index error is 1.1' off the arc, and your height of eye is 26 feet. What is the latitude at meridian transit?
Y a. 50°41.2'S N b. 51°02.2'S N c. 51°33.0'S N d. 51°41.2'S 1126: What are the dotted lines crossing at mile 529.7 AHP?
Y a. submarine cables N b. power cables N c. gated dams N d. workboat crossings 1149: 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 1229: Which type of daymark would you see on the Belle Island Corner Lt. at mile 458.6 AHP?
N a. Green - Diamond N b. Green - Square Y c. Red - Diamond N d. Red - Triangle 1245: The highest point on your towboat is 67 feet above the water, and the Helena Gage reads +22.3 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
N a. 74.7 feet N b. 52.4 feet N c. 49.8 feet Y d. 30.1 feet 1256: On 17 May , your 0300 ZT DR position is LAT 27°21.0'N,
LONG 146°14.0'E. You are on course 107°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?
N a. 0457 N b. 0511 N c. 0519 Y d. 0522 1279: At 0327 ZT, on 29 May , your DR position is LAT 25°00'N, LONG 64°15'W. You are steering 270°T at a speed of 13.6 knots. What is the zone time of sunrise?
N a. 0521 Y b. 0529 N c. 0536 N d. 0548 1392: On 3 February , your 0550 zone time DR position is LAT 26°16.0'N, LONG 112°05.0'W. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Spica, Antares, Saturn N b. Vega, Antares, Dubhe N c. Venus, Regulus, Vega Y d. Spica, Kochab, Rasalhague 1416: Which company does NOT have a marine facility along the river bank in Madison Parish (mile 457.0 AHP)?
N a. Complex Chemical Co. N b. Delta Southern Railroads N c. Mid-Delta Helena, LLC Y d. Baxter Wilson 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 1451: On 11 December , your 1816 ZT DR position is LAT 26°30.0'N, LONG 140°35.0'E. At that time, you observe Venus bearing 230°pgc. The chronometer reads 09h 14m 52s and the chronometer error is 01m 02s slow. The variation is 3.5°E. What is the gyro error?
N a. 2.2°E Y b. 3.3°E N c. 3.2°W N d. 4.2°W 1496: On 3 October , your 2122 ZT position is LAT 26°32'N, LONG 84°26'W. You observe Polaris bearing 359.8°pgc. At the time of the observation the helmsman noted that he was heading 106°pgc and 107°psc. The variation is 0°. What is the deviation for that heading?
N a. 1°E Y b. 0° N c. 1°W N d. 2°W 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 1928: On 17 March , your 0520 DR position is LAT 27°23.0'N, LONG 39°42.0'W. At this time you observe an unidentified star bearing 270°T with an observed altitude of 46°30.2'. The chronometer reads 08h 22m 15s, and is 01m 45s fast. What star did you observe?
N a. Altair N b. Alkaid Y c. Arcturus N d. Deneb 2241: At 1318 ZT, on 10 September , in DR position LAT 24° 05.8' N, LONG 058° 08.3' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 254° psc. Variation is 2° W. What is the deviation?
N a. 8.0°W N b. 8.0°E Y c. 4.0°W N d. 4.0°E 2320: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?
N a. 48.0 feet Y b. 53.2 feet N c. 68.2 feet N d. 116.0 feet 2321: At 2350 on 23 June, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?
N a. Privately maintained buoys at a yacht club N b. Government buoys marking the Hurricane Point dikes Y c. Barges moored at the Dennis Landing Terminal N d. A pipeline discharging dredge spoil 2326: The Coast Guard announces that Chesapeake Channel is closed indefinitely due to a collision in the channel between Trestle "B" and "C" of the Chesapeake Bay Bridge and Tunnel. You exit York Spit Channel, leaving buoy "22"
close abeam to port at 0.1 mile, and alter course to leave Horseshoe Crossing Lighted Bell Buoy "HC" abeam to port at 0.2 mile. What is the course per gyrocompass?
Y a. 185°pgc N b. 188°pgc N c. 191°pgc N d. 194°pgc 2533: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. List of Buoys and Daymarks N b. Coast Pilot N c. Army Corps. of Engineers Navigation Chart Y d. U.S.C.G. Local Notice to Mariners 2533: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. List of Buoys and Daymarks N b. Coast Pilot N c. Army Corps. of Engineers Navigation Chart Y d. U.S.C.G. Local Notice to Mariners 2673: At 2221 your course is 222°pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355° relative, at a range of 5.8 miles. The gyro error is 2°E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port?
N a. 206°pgc N b. 210°pgc Y c. 228°pgc N d. 231°pgc 2702: You are underway on course 241°T at a speed of 18.2 knots.
You sight a daymark bearing 241°T at a radar range of 3.9 miles at 1006. If you change course at 1009, what is the course to steer to leave the daymark abeam to starboard at 1.0 mile?
N a. 218°T Y b. 222°T N c. 257°T N d. 260°T 3068: Your vessel's propeller has a pitch of 22'06". From 0530, 19 March, to 1930, 20 March, the average RPM was 82. The distance run by observation was 721.5 miles. What was the slip?
N a. +4% Y b. -4% N c. +7% N d. -7% 3098: If the pitch of the propeller is 21.2 feet, and the revolutions per day are 93,660, calculate the day's run allowing 5% positive slip.
N a. 163.3 miles N b. 217.8 miles Y c. 310.3 miles N d. 342.9 miles 3109: You are turning 90 RPM, with a propeller pitch of 24 feet, and an estimated slip of -3%. What is the speed of advance?
N a. 18.8 knots N b. 19.2 knots N c. 20.6 knots Y d. 21.9 knots 3283: While steaming at 17.5 knots, your vessel consumes 378 barrels of fuel oil per day. In order to reduce consumption to 194 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 12.5 knots Y b. 14.0 knots N c. 15.5 knots N d. 16.8 knots 3616: You desire to make good a true course of 046°. The variation is 6°E, magnetic compass deviation is 12°W, and the gyrocompass error is 3°W. A northerly wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make good the true course?
Y a. 047°psc N b. 049°psc N c. 052°psc N d. 057°psc 10305: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position one mile due south of Block Island Southeast Point Light?
N a. 070.0° N b. 076.5° Y c. 082.5° N d. 087.5° 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 11809: What course should you steer by your standard magnetic compass (psc) from a position 2 miles due south of Branford Reef Light to Horton Pt. Light, if the set and drift of the current are 065°T at 2 knots, and a northerly wind will cause 2° of leeway? Your engines are turning for 14 knots.
N a. 113°psc N b. 118°psc Y c. 128°psc N d. 134°psc 12704: You are on course 137° per standard magnetic compass when you take the following bearings: Watch Hill Point Light - 051°psc Montauk Point Light - 184°psc Race Rock Light - 279°psc What is your position?
Y a. LAT 41°15.2'N, LONG 71°54.4'W N b. LAT 41°15.1'N, LONG 71°53.8'W N c. LAT 41°15.1'N, LONG 71°54.9'W N d. LAT 41°15.0'N, LONG 71°53.7'W 13002: At 0829 your position is LAT 41°02.9'N, LONG 72°57.4'W. You are making turns for 8.5 knots. What is your ETA at a position midway between buoys "1" and "2" at the entrance of New Haven Outer Channel?
N a. 0925 N b. 0931 N c. 0938 Y d. 0944 13108: At 1103 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at light "1" at the mouth of the approaches to Lake Montauk if you make good 8.2 knots?
N a. 1249 N b. 1254 N c. 1259 Y d. 1310 14200: What is the length of the city wharf at The Dalles on the Columbia River?
N a. 20 feet Y b. over 1000 feet N c. 800 feet N d. 600 feet 15008: At 1920, the buoy forward of your starboard beam is __________.
N a. an interrupted quick flashing buoy N b. Hog Island Lighted Bell Buoy N c. South Light Buoy Y d. Sand Shoal Inlet Lighted Buoy "A" 15513: If your height of eye is 35 feet (10.7 meters), what is the approximate geographic range of Block Island North Light?
N a. 7.4 nm N b. 13.0 nm N c. 14.3 nm Y d. 15.8 nm 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 15668: At 0839, 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. 8.2 knots Y b. 9.2 knots N c. 10.0 knots N d. 10.5 knots 16313: 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 Y b. 0751 N c. 0812 N d. 0825 16469: As you pass between trestle "B" and trestle "C" of the Chesapeake Bay Bridge - Tunnel, you sight along the trestle "C" when it is in line. The trestle bears 057° per standard magnetic compass while the vessel is heading 320°T. From this you know the __________.
Y a. vessel should be swung to check the deviation table N b. compass error is 12°W N c. deviation table is correct for that bearing N d. deviation is 10°W 16609: What was the speed made good between 2114 and 2142?
N a. 12.3 knots N b. 12.0 knots N c. 11.7 knots Y d. 11.4 knots