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.
53: What are the dimensions of Old River Lock, on the Lower Mississippi River?
Y a. 1190 feet x 75 feet N b. 1045 feet x 75 feet N c. 760 feet x 75 feet N d. 425 feet x 75 feet 53: What are the dimensions of Old River Lock, on the Lower Mississippi River?
Y a. 1190 feet x 75 feet N b. 1045 feet x 75 feet N c. 760 feet x 75 feet N d. 425 feet x 75 feet 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 74: You are turning for 7.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?
N a. 6.8 mph N b. 7.8 mph N c. 7.9 mph Y d. 8.8 mph 98: At 0230 on 13 August, 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 176: What is your 2118 position?
N a. LAT 36°56.6'N, LONG 76°01.0'W N b. LAT 36°57.0'N, LONG 76°01.5'W Y c. LAT 36°57.4'N, LONG 76°01.9'W N d. LAT 36°58.0'N, LONG 76°02.4'W 203: At 1800, your position is LAT 41°06.5'N, LONG 71°43.5'W. How would the buoy which bears 030°T from your position at a range of approximately 0.5 mile be painted?
N a. Horizontally banded, red over green Y b. Horizontally banded, green over red N c. Vertically striped, red and green N d. Solid green with red letters "BIS" 221: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA" (LL#375)?
Y a. 257.0° N b. 255.5° N c. 251.0° N d. 249.0° 273: If you correct for the current in the previous question (215°T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy "W"?
N a. 1014 N b. 1018 N c. 1021 Y d. 1026 282: From your 1752 position, you steer 307°pgc at 9 knots. At 1805, you obtain the visual bearings. What are the latitude and longitude of your 1805 position? Old Pt. Comfort Light 232°pgc. Chesapeake Bay Tunnel North Light 130°pgc.
Y a. LAT 37°05.9'N, LONG 76°08.0'W N b. LAT 37°06.0'N, LONG 76°08.4'W N c. LAT 37°05.9'N, LONG 76°07.7'W N d. LAT 37°06.1'N, LONG 76°07.5'W 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 468: Determine the great circle initial course from LAT 07°05.0'N, LONG 81°45.0'W to LAT 21°15.0'N, LONG 157°40.0'W.
N a. 128°T N b. 217°T Y c. 290°T N d. 326°T 480: The great circle distance from LAT 25°50'N, LONG 77°00'W to LAT 35°56'N, LONG 06°15'W is 3616 miles, and the initial course is 061.7°T. The position of the vertex is LAT 37°34.9'N, LONG 25°59.0'W. Determine the latitude intersecting the great circle track 600 miles west of the vertex, along the great circle track.
Y a. 36°54.9'N N b. 36°50.2'N N c. 36°45.9'N N d. 36°36.8'N 493: At 0815, Montauk Pt. Light House is bearing 167°T, Shagwong Pt. has a radar range of 4.5 miles, and Cerberus Shoal "9" Buoy is bearing 284°T. If the engine is making turns for 10 knots, what was the set and drift of the current since 0748?
N a. Set 065°T, drift 1.1 knots N b. Set 065°T, drift 2.4 knots Y c. Set 245°T, drift 2.4 knots N d. Set 245°T, drift 1.1 knots 503: What was the speed made good between 2114 and 2142?
Y a. 11.4 knots N b. 11.7 knots N c. 12.0 knots N d. 12.3 knots 568: 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 Y b. Coast Pilot N c. Light List N d. Chart Number 1 623: You are on a voyage from Baltimore, MD, to Seattle, WA. The distance from pilot to pilot is 5960 miles. The speed of advance is 16.0 knots. You estimate 16 hours for bunkering at Colon, and 12.0 hours for the Panama Canal transit. If you take departure at 0824 hours (ZD +5), 18 November, what is your ETA (ZD +8) at Seattle?
N a. 1654, 5 December N b. 1354, 5 December Y c. 2154, 4 December N d. 1354, 4 December 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 705: At 1554, on 25 May, you pass Huntington Point Light (mile 555.2 AHP). What was your average speed since departing Amoco Pipeline Co. DockS (mile 253.6 AHP)?
Y a. 6.2 mph N b. 5.2 mph N c. 4.8 mph N d. 4.3 mph 1212: It is 21 November and you are keeping zone time +8. You are on course 082°T, speed 19 knots. Your 0830 DR position is LAT 24°14.8'N, LONG 133°35.5'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 35m 02s N b. 13h 03m 20s N c. 12h 35m 59s Y d. 12h 34m 51s 1364: 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. U.S.C.G. Light List N c. Army Corps. of Engineers Navigation Chart Y d. None of the above 1727: You pass under the Natchez bridge (mile 363.3 AHP) at 1300, on 27 March, and estimate the current to be 3.3 mph. What is your ETA at St. Louis if you continue to turn for 7.5 mph?
N a. 0617, 4 April Y b. 0316, 4 April N c. 1153, 30 March N d. 1253, 31 April 1914: On 14 January , your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 192°T at an observed altitude (Ho) of 06°15.2'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?
N a. Gienah N b. Kochab Y c. Gacrux N d. Eltanin 2211: Your engine speed is 9.8 mph and you estimate the current at 1.6 mph. What is your speed over the ground?
N a. 11.0 mph N b. 9.8 mph N c. 8.6 mph Y d. 8.2 mph 2371: Which of the following statements are TRUE?
N a. Oil well structures are listed in the Light List. N b. All aids to navigation with lights have lateral significance. Y c. On the Western Rivers, crossing marks may exhibit white lights. N d. None of the above. 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 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% 3061: The propeller on a vessel has a diameter of 20.2 feet and a pitch of 19.0 feet. What would be the apparent slip if the vessel cruised 367 miles in a 24 hour day (observed distance) at an average RPM of 84?
Y a. +2.9% N b. -2.9% N c. +5.2% N d. -5.2% 3084: If the speed necessary for reaching port at a designated time is 18.6 knots, and the pitch of the propeller is 26.2 feet, how many revolutions per minute will the shaft have to turn, assuming a 4% negative slip?
Y a. 69 N b. 72 N c. 75 N d. 78 3085: You must average 16.25 knots to reach port at a designated time. Your propeller has a pitch of 21'08", and you estimate 4% negative slip. How many RPM's must you average to arrive on time?
Y a. 73 RPM N b. 77 RPM N c. 82 RPM N d. 88 RPM 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 3620: Your vessel is steering course 197°psc, variation for the area is 7°E, and deviation is 4°W. The wind is from the west, producing a 2° leeway. Which true course are you making good?
N a. 192°T N b. 196°T Y c. 198°T N d. 202°T 4004: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 166°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324°
N a. 2.0°W Y b. 1.5°W N c. 1.0°W N d. 0.5°W 10709: At 0726 you depart Lake Montauk with light 1 close aboard and set course 065° per standard magnetic compass at 6.7 knots. At 0912 your GPS position is LAT 41°10.5'N, LONG 71°46.6'W. What is the current?
N a. 151°T at 1.2 knots N b. 164°T at 0.7 knot N c. 227°T at 0.9 knot Y d. 240°T at 1.4 knots 11003: What best describes the condition of the tidal current at New London Harbor Entrance, at 0945 on 3 March 1983?
N a. It is slack water. Y b. The current has reached its maximum flood velocity. N c. It has reached its maximum ebb velocity. N d. The current is approaching slack water. 11507: 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 1222 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the speed made good?
N a. 8.4 knots N b. 8.6 knots Y c. 9.2 knots N d. 9.6 knots 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 12705: You are on course 087° per standard magnetic compass when you take the following bearings: Little Gull Island Light 277°psc Race Rock Light 303°psc Latimer Reef Light 025°psc What is your position?
Y a. LAT 41°13.1'N, LONG 71°57.5'W N b. LAT 41°13.1'N, LONG 71°56.9'W N c. LAT 41°13.0'N, LONG 71°58.0'W N d. LAT 41°12.9'N, LONG 71°57.2'W 13900: The trapezoidal shaped areas enclosed by a thin broken magenta line and located along the south coast of Long Island are __________.
N a. designated training areas for Navy amphibious craft N b. disposal areas for unexploded munitions Y c. fish trap areas N d. anchorage areas for small craft 14502: You are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville reservoir stands at 84 feet above MSL. If the highest point on your vessel is 49 feet above the water, what will be the vertical clearance as you pass under the center of the Bridge of the Gods?
Y a. 74.0 feet N b. 86.0 feet N c. 97.5 feet N d. 123 feet 15024: Which of the following statements regarding buoys on the Mississippi River is TRUE?
N a. The positions of river buoys can be found in the latest edition of Light List-Vol. V. Y b. Buoy positions on the chart are approximate. N c. The buoys are maintained on station year round. N d. The buoys do not shift positions due to permanent moorings. 15108: Your 1752 position places you __________.
Y a. less than 0.5 mile westward of York Spit Channel N b. less than 0.5 mile eastward 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 15111: At 1810, you sight a buoy on your starboard side labeled "19".
This buoy marks __________.
N a. a submerged obstruction in York Spit Channel N b. the visibility limit of the red sector of Cape Henry Light Y c. the side of York Spit Channel N d. the junction of the York Spit and York River Entrance Channels 15346: At 1942 Point Judith bears 030°T and has a range of 3.6 miles and Sandy Point has a range of 5.3 miles. What was your speed made good from your 1850 position?
N a. 12.5 knots Y b. 13.0 knots N c. 13.5 knots N d. 14.0 knots 15611: From your 1815 position, you want to make good a course of 263°T. Your engines are turning RPM's for 12 knots. The current is 050°T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light?
N a. 1849 N b. 1854 N c. 1859 Y d. 1904 15622: What are the dimensions of the Old River Lock on the Lower Old River (304 AHP)?
Y a. 1190 x 75 feet N b. 1195 x 75 feet N c. 1195 x 84 feet N d. 1202 x 84 feet 15627: What is the vertical clearance of the Natchez Highway Bridge (westbound) when the river level is the same as the Low Water Reference Plane (6.1 ft)?
N a. 102.2 ft N b. 108.3 ft Y c. 119.4 ft N d. 125.6 ft 15712: At 0910, your DR position is LAT 41°11.9'N, LONG 72°47.8'
W. Your vessel is on course 097°T at 9.5 knots, and the weather is foggy. At 0915, Branford Reef Light is sighted through a break in the fog bearing 318°T. At 0945,
Falkner Island Light is sighted bearing 042°T. What is your 0945 running fix position?
N a. LAT 41°11.1'N, LONG 72°41.2'W N b. LAT 41°11.3'N, LONG 72°41.3'W N c. LAT 41°11.4'N, LONG 72°41.0'W Y d. LAT 41°11.5'N, LONG 72°40.7'W 15814: At 0130, you obtain the following bearings:
Horton Point Lighthouse 078°T
Mattituck Breakwater Light tower 196°T
What were the course and speed made good between 0100 and 0130?
Y a. 246°T at 9.8 knots N b. 253°T at 9.4 knots N c. 259°T at 9.8 knots N d. 267°T at 9.4 knots 15846: At 2200, you alter course to 204°T, at 14 knots. You expect a current on this leg of the trip, setting 325° at 1.5 knots. Which course should you steer per gyro compass to make good the true course?
N a. 184°pgc N b. 190°pgc N c. 194°pgc Y d. 201°pgc 16140: Available information indicates that there is a set and drift in this area of 290°T at 2 knots. Allowing for this set and drift, what course must you steer to make good a true course of 150°, while maintaining an engine speed of 13 knots, from your 1930 position?
N a. 141°T Y b. 145°T N c. 149°T N d. 153°T 16416: At 1345, you depart from a position 1 mile due east of Montauk Point Light and set course for Block Island Southeast Light at 9 knots. At 1430 your position is Latitude 41° 06.3' North Longitude 071° 41.9' West
What was the current encountered since 1345?
N a. Set 015°, drift 0.5 knot Y b. Set 195°, drift 0.5 knot N c. Set 015°, drift 0.7 knot N d. Set 195°, drift 0.7 knot 16620: You sight Bartlett Reef Light in line with New London Harbor Light bearing 043°pgc. You are heading 088°pgc and 098.5° per standard magnetic compass at the time of the observation. Which statement is TRUE?
N a. The true heading at the observation was 090°. Y b. The deviation is 1.5°E by observation. N c. The magnetic compass error is 9.5°W. N d. The gyro error is 2°E.