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.
64: What is the length of the trip?
N a. 726.0 miles Y b. 851.9 miles N c. 878.9 miles N d. 879.6 miles 126: What is your clearance as you pass under the Vicksburg Highway 80 Bridge (mile 437.8 AHP). if the Vicksburg Gage reads 14.8 feet and the highest point on your tow boat is 44.5 feet?
N a. 36 feet N b. 42 feet Y c. 57 feet N d. 66 feet 198: While navigating inbound Thimble Shoal Channel system you must __________.
N a. navigate in the main channel when between Trestles A & B Y b. use the north auxiliary channel N c. remain 1500 yards (1360 meters) from large naval vessels N d. maintain a speed of six knots 251: You alter course from your 0045 position to head for Mattituck Breakwater Light "MI". If the visibility is 10 miles and you make good 9 knots, at what time will you lose sight of Saybrook Breakwater Light?
Y a. 0100 N b. 0123 N c. 0131 N d. The light is visible all the way to Mattituck Inlet 373: What is your ETA at point "A"?
N a. 0702 N b. 0655 Y c. 0651 N d. 0640 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. 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 438: You estimate that you are making 9.3 knots over the ground. At what time will you enter waters governed by the COLREGS?
N a. 0258 N b. 0255 Y c. 0251 N d. 0247 473: The great circle distance from LAT 08°50.0'N, LONG 80°21.0'W to LAT 22°36.0'N, LONG 128°16.0'E is 7801 miles and the initial course is 318°45' T. The latitude of the vertex is 49°20.6'N. What is the longitude of the vertex?
N a. 156°43'W Y b. 162°41'W N c. 159°32'W N d. 161°18'W 563: At 0705, the gyro loses power. At 0715, you are on course 092° per standard magnetic compass (psc) when you take the following bearings: Falkner Light bears 356°psc, Horton Point Light bears 123°psc, and Kelsey Point Breakwater Light bears 048°psc. What is the position of your 0715 fix?
N a. LAT 41°06.7'N, LONG 72°36.0'W Y b. LAT 41°07.0'N, LONG 72°36.2'W N c. LAT 41°07.2'N, LONG 72°36.4'W N d. LAT 41°07.4'N, LONG 72°36.4'W 688: What is the distance from the Amoco Docks at Baton Rouge, LA, to Pittsburgh, PA?
N a. 727.9 miles N b. 981.5 miles N c. 1575.3 miles Y d. 1681.7 miles 1107: On 16 April , your 0200 zone time DR position is LAT 17°18'S, LONG 168°46'E. You are on course 236°T at a speed of 16 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 17°54.9'S, LONG 167°48.7'E N b. LAT 17°55.6'S, LONG 167°45.1'E N c. LAT 17°56.8'S, LONG 167°52.4'E Y d. LAT 18°00.4'S, LONG 167°49.2'E 1189: On 7 February , your 0800 zone time DR position is LAT 22°16.0'N, LONG 92°26.0'W. Your vessel is on course 270°
T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1218 N b. 1222 N c. 1226 Y d. 1230 1282: On 1 November , your 1600 zone time DR position is LAT 27°48'S, LONG 91°26'E. Your vessel is on a course of 327°
T at a speed of 16 knots. What will be the zone time of sunset at your vessel?
Y a. 1813 N b. 1821 N c. 1829 N d. 1836 1411: After you get underway, what is the first river gage you will pass?
N a. Head of Passes N b. Baton Rouge Y c. Bayou Sara N d. Red River Landing 1735: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 3.6 feet. If the highest point on your vessel is 62 ft. above the water, what is your vertical clearance?
Y a. 60.4 feet N b. 63.6 feet N c. 67.2 feet N d. 122.0 feet 1858: On 22 April , your 1852 ZT DR position is LAT 23°54.5'
N, LONG 117°36.8'W. You observe an unidentified star bearing 129°T at an observed altitude (Ho) of 27°10.0'. The chronometer reads 02h 54m 53s and is 02m 51s fast. What star did you observe?
N a. Diphda N b. Betelgeuse Y c. Gienah N d. Arcturus 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 1913: On 14 January , your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?
Y a. Gienah N b. Kochab N c. Gacrux N d. Eltanin 2006: On 8 November , your 1731 zone time DR position is LAT 27°16.0'N, LONG 137°25.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
Y a. Alphecca, Fomalhaut, Schedar N b. Antares, Rasalhague, Altair N c. Sirius, Hamal, Dubhe N d. Peacock, Ankaa, Al Na'ir 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' 2282: You observe the lower limb of the Sun at a sextant altitude (hs) of 42°44.0' on 22 June . The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?
N a. 42°19.8' N b. 42°21.7' Y c. 42°51.7' N d. 42°54.2' 2402: You will enter waters governed by the International Rules when __________.
N a. you cross the territorial sea boundary line N b. enter the pilotage area N c. you cross the boundary of the contiguous zone Y d. Cape Henry Light bears 202°T 2683: You are underway on a course of 135°pgc at 15 knots, and you sight a lighthouse dead ahead at a range of 12.5 miles at 1145. What course would you steer to leave the lighthouse 3.0 miles off your port beam?
N a. 117°pgc N b. 121°pgc Y c. 149°pgc N d. 154°pgc 2873: Your vessel is on a course of 103°T at 14 knots. At 1918 a light bears 129.5°T, and at 1937 the light bears 148°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 1947, 2.8 miles N b. 1950, 3.2 miles N c. 1953, 3.8 miles Y d. 1956, 4.4 miles 2882: Your vessel is steering 096°T at 17 knots. At 1847 a light bears 057°T, and at 1916 the same light bears 033°T. What will be your distance off abeam?
N a. 9.9 miles N b. 10.7 miles Y c. 11.4 miles N d. 11.9 miles 2893: You are steaming on a course of 253°T at 14 knots. At 2329 you observe a lighthouse bearing 282°T. At 2345 the lighthouse bears 300°T. What is your distance off at the second bearing?
N a. 3.7 miles N b. 4.3 miles N c. 5.2 miles Y d. 5.9 miles 3060: The propeller on a vessel has a diameter of 24.0 feet and a pitch of 21.3 feet. What would be the slip if the vessel cruised 510 miles in a 24 hour day (observed distance) at an average RPM of 86?
N a. -12.2% N b. +12.2% Y c. -17.5% N d. +17.5% 3083: The speed necessary to reach port at a designated time is 18.7 knots. The propeller pitch is 24'03", and you estimate 3% positive slip. How many RPM's will the shaft have to turn?
Y a. 81 RPM N b. 87 RPM N c. 98 RPM N d. 104 RPM 3100: The pitch of the propeller on your vessel is 19'09". You estimate the slip at -3%. If you averaged 82 RPM for the day's run, how many miles did you steam?
N a. 370.8 N b. 373.6 N c. 393.7 Y d. 395.3 3263: You have steamed 1124 miles at 21 knots, and consumed 326 tons of fuel. If you have 210 tons of usable fuel remaining, how far can you steam at 17 knots?
N a. 1096 miles Y b. 1105 miles N c. 1218 miles N d. 1304 miles 4010: 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 104°.
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. 1.8°E N b. 2.6°E Y c. 2.2°W N d. 2.7°W 10703: At 1516 your position is LAT 41°11.3'N, LONG 71°48.6'W. You are on course 300° per standard magnetic compass at 9.4 knots. At 1600 your position is LAT 41°14.0'N, LONG 71°58.1'W. What were the set and drift?
N a. 142°T at 1.9 knots N b. 153°T at 1.4 knots Y c. 332°T at 1.5 knots N d. 347°T at 1.1 knots 11101: Great Salt Pond on Block Island is __________.
Y a. entered through a dredged cut N b. not accessible in easterly gales N c. available for vessels up to a maximum draft of 8 feet (2.4m) N d. not affected by the tide 11308: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 2011 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the speed made good?
Y a. 13.7 knots N b. 12.0 knots N c. 11.6 knots N d. 10.9 knots 12305: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 095° per standard magnetic compass. If your vessel was heading 056° per standard magnetic compass at the time, which of the following is TRUE?
N a. You should subtract 15°Compass error for bearings of 095°. N b. The deviation table is correct for all bearings of 095°. Y c. The vessel should be swung, and the deviation table checked. N d. The compass error is 19°W for all headings. 12308: You sight North Dumpling Island Light in line with Latimer Reef Light (LAT 41°18.2'N, LONG 71°56.0'W) bearing 094° per standard magnetic compass. If your vessel was heading 207° per standard magnetic compass at the time, which of the following is TRUE?
Y a. The deviation table is correct for that heading. N b. The deviation by observation is 3°E. N c. The compass error is 12°W. N d. You should subtract 18° from all bearings of 094°. 12706: You are on course 053° per standard magnetic compass when you take the following bearings: Little Gull Island Light 275°psc Race Rock Light 296°psc Latimer Reef Light 011°psc What is your position?
N a. LAT 41°12.9'N, LONG 71°56.3'W Y b. LAT 41°13.2'N, LONG 71°56.0'W N c. LAT 41°13.4'N, LONG 71°55.5'W N d. LAT 41°13.8'N, LONG 71°56.1'W 13405: At 0400 your vessel is dead in the water and in heavy fog. Your GPS position is LAT 41°12.1'N, LONG 72°43.5'W. Bottom samples are taken and indicate a composition of soft mud and shell. Your fathometer reads 40 feet. If the vessel draws 9 feet of water, which of the following is TRUE?
Y a. The bottom samples and fathometer reading prove the fix is reliable. N b. The bottom samples and fathometer readings indicate that the fix is unreliable. N c. The information collected indicates that the fathometer may be in error. N d. The information collected indicates that the chart is most likely in error. 13804: What is the significance of the broken magenta lines which roughly parallel the shore between Roanoke Point and Orient Point on Long Island?
N a. They mark the limits of breakers in that area. N b. These lines warn the mariner of submerged rocks. Y c. They mark the boundary lines of fish trap areas. N d. These lines warn the mariner of submerged pipelines. 15210: What course should you steer per standard magnetic compass in order to navigate down the center of York River Entrance Channel (ignore set and drift)?
N a. 139°psc Y b. 141°psc N c. 147°psc N d. 149°psc 15211: You have just passed York River Entrance Channel Lighted Buoys "13" and "14". The chart shows a light approximately 1.0 mile off your port beam with a light characteristic "Fl 6 sec". What is the name of this light?
N a. Mobjack Bay Entrance Light N b. New Point Comfort Shoal Light Y c. York Spit Light N d. York River Entrance Channel Light "1" 15266: At 1210, you are in position LAT 41°14.3'N, LONG 72°16.5'W. What is the charted depth of water?
N a. 97 feet (29.4 meters) Y b. 108 feet (32.7 meters) N c. 119 feet (36.1 meters) N d. 125 feet (37.9 meters) 15360: Your 0507 position is about 7 miles from Bridgeport, CT. What is the distance from this position to Newport, RI?
Y a. 88 miles N b. 95 miles N c. 101 miles N d. 114 miles 15468: Which loran line of position will serve as a danger reading on the loran to keep you west of the submerged obstruction at LAT 37°24.2'N, LONG 76°03.7'W, after you leave York Spit Channel?
N a. Not less than 9960-Z-58622 N b. Not more than 9960-Y-41595 N c. Not less than 9960-Y-41595 Y d. Not less than 9960-X-27246 15657: What was the course made good from 0630 to 0654?
N a. 078°T Y b. 082°T N c. 086°T N d. 090°T 15742: At 2100 your position is LAT 40°58.5'N, LONG 71°46.0'W. You are proceeding north. At 2131 Montauk Point Light has a radar range of 5.1 miles and bears 284°T. Block Island Southeast Light has a radar range of 10.8 miles. What was the course made good from your 2100 position?
N a. 005°T Y b. 011°T N c. 017°T N d. 025°T 15968: What was the speed made good from 1900 to 1925?
N a. 8.5 knots N b. 8.7 knots N c. 8.8 knots Y d. 9.1 knots 16340: If you make good your intended course and speed, at what time will you cross the 150-foot curve?
N a. 2237 N b. 2249 Y c. 2256 N d. 2301 16341: At 2230 you take the following visual bearings:
Montauk Point Light, Long Island 317°pgc
Southeast Point Light, Block Island 009°pgc
What is your position?
N a. LAT 40°51.2'N, LONG 71°35.9'W N b. LAT 40°51.5'N, LONG 71°36.4'W N c. LAT 40°52.2'N, LONG 71°36.6'W Y d. LAT 40°52.0'N, LONG 71°37.4'W 16611: At 0109 you get underway, and at 0112 you take the following set of bearings:
Branford Reef Light bearing 051°true
Stratford Point Light bearing 258°true
What is your 0112 position?
N a. LAT 41°11.2'N, LONG 72°51.7'W N b. LAT 41°11.4'N, LONG 72°50.5'W Y c. LAT 41°11.4'N, LONG 72°51.3'W N d. LAT 41°11.8'N, LONG 72°51.5'W