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.
54: What is the length of the trip?
N a. 1566.4 miles N b. 1334.6 miles N c. 1332.2 miles Y d. 1088.0 miles 145: As you approach Joseph Henry Light (mile 445.2 AHP) which daymark would you see?
Y a. Red triangle N b. Red diamond N c. Green diamond N d. Green square 172: If you steer 143°pgc from your 2015 position at an engine speed of 8.0 knots, at what time would you reach a point midway between buoys "11" and "12" (ignore set and drift)?
Y a. 2029 N b. 2032 N c. 2035 N d. 2037 271: At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102°T. What is the approximate charted depth of the water?
Y a. 29 ft (8.8 meters) N b. 22 ft (6.7 meters) N c. 19 ft (5.8 meters) N d. 14 ft (4.2 meters) 313: At 1400, your position is LAT 37°14.7'N, LONG 76°22.3'W. From this position, you head for the York River Entrance Channel Buoy "17". What should you steer per standard magnetic compass for this heading?
Y a. 125°psc N b. 122°psc N c. 119°psc N d. 108°psc 472: The great circle distance from LAT 38°17.0'N, LONG 123°16.0'W to LAT 35°01.0'N, LONG 142°21.0'E is 4330 miles and the initial course is 300.9°T. The latitude of the vertex is 47°40.5'N. What is the longitude of the vertex?
N a. 173°04.6'E N b. 167°18.0'E N c. 173°04.6'W Y d. 167°18.5'W 475: The great circle distance from LAT 35°08.0'S, LONG 19°26.0'E to LAT 33°16.0'S, LONG 115°36.0'E is 4559 miles and the initial course is 121°T. Determine the latitude of the vertex.
N a. 44°29.1'S Y b. 45°30.9'S N c. 46°18.2'S N d. 43°41.8'S 478: The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial course is 300.9°T. Determine the latitude of the vertex.
N a. 46°54.8'N N b. 47°24.7'N N c. 47°35.2'N Y d. 47°40.5'N 506: At 0112, what is the approximate depth under the keel?
N a. 57 feet (17.3 meters) N b. 51 feet (15.5 meters) N c. 47 feet (14.2 meters) Y d. 38 feet (11.5 meters) 539: Determine the distance from LAT 59°12'N, LONG 14°00'W to LAT 59°12'N, LONG 03°20'W by parallel sailing.
N a. 324.2 miles N b. 325.4 miles Y c. 327.7 miles N d. 328.9 miles 564: Horton Point Light __________.
N a. is 14 feet above sea level N b. has a fixed green light Y c. is shown from a white square tower N d. is synchronized with a radio beacon 608: At 1200 zone time, on 10 October , you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Yokohama, LAT 35°27.0'N, LONG 139°39.0'E, and you estimate your speed of advance at 22 knots. The distance is 4,536 miles. What is your estimated zone time of arrival at Yokohama?
N a. 0111, 19 October N b. 0211, 19 October N c. 1011, 19 October Y d. 1911, 19 October 609: At 0915 zone time, on 7 April , you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Kobe, LAT 34°40.0'N, LONG 135°12.0'E, and you estimate your speed of advance at 17 knots. The distance is 4,819 miles. What is your estimated zone time of arrival at Kobe?
N a. 0343, 18 April N b. 1243, 19 April Y c. 2143, 19 April N d. 0443, 20 April 635: You complete changing out your tow and get underway enroute Ark City Tank Storage (mile 554.0 AHP) to deliver the tank barges. What is the distance you must travel from Cairo Point Light?
N a. 606.8 miles N b. 554.0 miles Y c. 399.8 miles N d. 202.1 miles 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 2028: You are turning for 10 mph and passing Hog Point, LA. (mile 297.5 AHP). Angola reports that the current at Red River Landing is 4.5 mph. Which statement is TRUE?
N a. The main channel lies on the south side of the island you see ahead. N b. You are making 14.5 mph over the ground. Y c. An underwater stone dike has been constructed 0.5 miles upstream of Miles Bar Towhead. N d. You would expect to find the more favorable current near the broken red line in the river. 2061: As you approach mile 225 AHP, you notice on the map a black broken line crossing the river at mile 224.2 AHP. This line indicates __________.
N a. ferry crossing N b. submarine crossing N c. gas pipelines Y d. power lines 2110: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?
N a. 38.5 feet (11.7 meters) N b. 43.5 feet (13.2 meters) N c. 51.0 feet (15.5 meters) Y d. 59.5 feet (18.0 meters) 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° 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 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 2701: You are underway on course 204°T at a speed of 17.3 knots. You sight a light bearing 205°T at a radar range of 4.7 miles at 1222. If you change course at 1228, what is the course to steer to leave the light abeam to port at 1.5 miles?
N a. 223°T N b. 229°T Y c. 236°T N d. 240°T 2783: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)?
Y a. Green square N b. Green triangle N c. Green diamond N d. Red square 2867: Your vessel is on a course of 144°T at 20 knots. At 0022 a light bears 117.5°T, and at 0035 the light bears 099°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0044, 3.2 miles Y b. 0048, 4.3 miles N c. 0052, 5.1 miles N d. 0056, 6.0 miles 2885: Your vessel is steering 194°T at 13 knots. At 0116 a light bears 243°T, and at 0147 the same light bears 267°T. What will be your distance off abeam?
N a. 11.2 miles N b. 11.6 miles Y c. 12.0 miles N d. 12.5 miles 3064: The propeller of a vessel has a pitch of 19.0 feet. If the vessel traveled 183.5 miles (observed distance) in 24 hours at an average of 44 RPM, what was the slip?
Y a. +7.4% N b. -7.4% N c. +11.6% N d. -11.6% 3075: If the speed necessary for reaching port at a designated time is 15.7 knots and the pitch of the propeller is 23.4 feet, how many revolutions per minute will the shaft have to turn, assuming a 6% negative slip?
Y a. 64 N b. 68 N c. 72 N d. 76 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 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 3291: While steaming at 19.5 knots, your vessel burns 297 bbls of fuel per day. What will be the rate of fuel consumption if you decrease speed to 15 knots?
Y a. 135 bbls N b. 176 bbls N c. 229 bbls N d. 243 bbls 4000: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 057°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320°
N a. 1.0°E N b. 1.5°E Y c. 1.5°W N d. 0.5°W 10500: At 1712 your GPS indicates a position of LAT 36°54.8'N, LONG 75°39.8'W. You are on course 319° per standard magnetic compass at a speed of 9.9 knots. At 1800 your GPS indicates your position at LAT 37°00.0'N, LONG 75°45.8'W. What were the set and drift?
N a. 262°T at 0.9 knot N b. 267°T at 1.3 knots Y c. 087°T at 1.2 knots N d. 093°T at 0.8 knot 10705: At 0726 you depart Lake Montauk with light 1 close aboard and set course 013.5° per standard magnetic compass at 7.6 knots. At 0812 your GPS position is LAT 41°10.0'N, LONG 71°55.9'W. What is the current?
N a. 151°T at 1.0 knot Y b. 164°T at 0.7 knot N c. 334°T at 1.1 knots N d. 321°T at 0.8 knot 10900: The abandoned lighthouse west of Cape Henry Light is __________.
N a. painted black and white N b. a low mound of rubble Y c. a gray, pyramidal structure N d. a steel skeleton structure 12201: Your vessel is steady on a heading of 203° per standard magnetic compass when you sight New Haven Light and New Haven Outer Channel Range Front Light in line over the stern. This information indicates that the __________.
N a. existing deviation table is correct for this heading N b. compass error is 17°W Y c. deviation table is in error for this heading N d. deviation is 1°E 12302: You are on course 203° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 194° per standard magnetic compass. Based on this you __________.
N a. know the correct deviation is 3°W Y b. should swing your vessel to check the deviation table N c. should apply 15°W compass error to all compass readings N d. know you are steering a true course of 185° 12302: You are on course 203° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 194° per standard magnetic compass. Based on this you __________.
N a. know the correct deviation is 3°W Y b. should swing your vessel to check the deviation table N c. should apply 15°W compass error to all compass readings N d. know you are steering a true course of 185° 13109: At 1113 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 9.6 knots?
N a. 1310 Y b. 1301 N c. 1254 N d. 1249 15120: If you have 17.3 miles to reach your destination from your 2000 position and want to be there at 2230, what speed should you make good?
N a. 5.7 knots N b. 6.1 knots N c. 6.5 knots Y d. 6.9 knots 15614: From your 1920 position, you change course to enter Chesapeake Channel between buoys 9 and 10. What is the course per standard magnetic compass (psc) ?
N a. 286°psc Y b. 283°psc N c. 280°psc N d. 274°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 15919: At 1200, your position is 2.0 miles southwest of Bartlett Reef Light. Your heading is 075°T. Visibility is less than 0.2 mile in fog and rain. Which of the following signals is most likely to be from another vessel?
N a. Whistle from 125° relative Y b. Whistle from 075° relative N c. Bell from 350° relative N d. Horn from 330° relative 15942: At 1959 Watch Hill Point Light bears 030°T, Montauk Point Light bears 146°T, and Little Gull Light bears 283°T. What is the approximate fathometer reading?
Y a. 51 feet N b. 73 feet N c. 95 feet N d. 111 feet 15946: At 2132 you sight Block Island Southest Point Light in line with the Aerobeacon (rotating white and green) bearing 308.5°pgc. The helmsman reports he was heading 106°pgc and 119°psc. What is the deviation on that heading?
N a. 4°W N b. 2°W Y c. 2°E N d. 4°E 16010: The characteristic of Branford Reef Light is __________.
N a. flashing red every 4 seconds N b. flashing red every 3 seconds Y c. flashing white every 6 seconds N d. flashing yellow every 4 seconds 16357: The coast between Great Machipongo Inlet and Cape Charles is __________.
N a. composed of high rocky bluffs and wooded uplands N b. marked by prominent isolated barren hills N c. broken by the mouths of several major rivers Y d. low with sandy beaches bordered by marshes 16368: Why should mariners use extreme care when navigating within the precautionary area centered on Chesapeake Bay Entrance Junction Lighted Gong Buoy CBJ?
N a. There are numerous underwater obstructions that are a hazard to vessels with drafts exceeding 2 meters (6.5 feet). N b. Fishing vessels of limited maneuverability routinely operate in this area when hunting oyster and crabs. Y c. Vessels may approach from different directions from the inbound separation lanes and from Chesapeake and Thimble Shoal Channel. N d. Large naval vessels having the right of way often enter the area when bound to or from the Norfolk Naval Base. 16556: You are underway in the vicinity of Block Island and obtain the following lines of position:
Montauk Point Light 267°pgc
Block Island Southeast Light 030°pgc
Radar Bearing to Block Island
Southwest Point (tangent) 352°pgc
What is your position at the time of these sightings?
N a. LAT 41°05.2'N, LONG 71°36.2'W Y b. LAT 41°05.3'N, LONG 71°35.8'W N c. LAT 41°05.4'N, LONG 71°36.0'W N d. LAT 41°05.4'N, LONG 71°35.9'W