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.
45: You are in charge of a vessel that damages an aid to navigation established and maintained by the United States. Which statement is TRUE?
N a. You must take the aid in tow and deliver it to the nearest Coast Guard, Marine Safety Office. Y b. You must report the accident to the nearest Officer in Charge, Marine Inspection. N c. You may wait until you reach your destination before reporting the allision to the U.S. Coast Guard. N d. You must report the allision to the nearest Corps. of Engineers office. 71: The Natchez Gage reads 20.6 feet. The high point on your towboat is 47 feet above the water. What is the vertical clearance as you pass under the Natchez Highway Bridge?
N a. 78.6 feet N b. 72.5 feet N c. 64.1 feet Y d. 58.4 feet 73: The area between Island 67 Upper Light (mile 623.1 AHP) and Sunflower Cut-off Foot Light (mile 624.8 AHP) is known as a __________.
Y a. crossing N b. chute N c. transit N d. slough 291: What is the height above water of Davis Creek Channel Light "1"?
Y a. 15 feet (4.6 meters) N b. 17 feet (5.2 meters) N c. 19 feet (5.8 meters) N d. 24 feet (7.3 meters) 356: At 0410, you take the following bearings:
New Point Comfort Light "2" 242°T
Wolf Trap Light 313°T
Horn Harbor Entrance Light "HH" 262°T
What is your 0410 position?
N a. LAT 37°20.9'N, LONG 76°07.7'W Y b. LAT 37°21.0'N, LONG 76°08.1'W N c. LAT 37°21.1'N, LONG 76°07.9'W N d. LAT 37°21.2'N, LONG 76°08.2'W 481: 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. Determine the latitude of the vertex.
N a. 37°32.2'N Y b. 37°34.9'N N c. 37°41.6'N N d. 37°45.2'N 501: You depart from the position in the previous question at 2114 and make good 12 knots on a course of 040°T. At what time will you sight New Haven Light if the visibility is 11 miles?
N a. The light is visible at 2114. N b. 2152 Y c. 2159 N d. 2206 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 593: What is the length of the trip?
N a. 1195.4 miles N b. 1223.1 miles Y c. 1520.1 miles N d. 1657.8 miles 653: On which voyage would a great circle track be significantly shorter than a rhumb line track? (Use gnomonic tracking chart WOXZC 5274)
Y a. Savannah, GA, to Lisbon, Portugal N b. Dublin, Ireland (Irish Sea), to La Coruna, Spain (LAT 43°22'N, LONG 8°24'W) N c. Reykjavik, Iceland, to Lisbon, Portugal N d. Boston to Sable Island 706: The solid lines extending into the channel at mile 948 AHP are __________.
N a. revetments Y b. dikes N c. spoil areas N d. Westvaco Service Facilities 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 989: On 2 April , your 0830 zone time fix gives you a position of LAT 20°16.0'S, LONG 004°12.0'E. Your vessel is steaming a course of 143°T at a speed of 18.0 knots. An observation of the Sun's upper limb is made at 0903 zone time, and the observed altitude (Ho) is 42°39.6'. The chronometer reads 09h 05m 40s, and the chronometer error is 02m 15s fast. Local apparent noon occurs at 1145 zone time,
and a meridian altitude of the Sun's lower limb is made.
The observed altitude (Ho) for this sight is 63°46.2'.
Determine the vessel's 1200 zone time position.
N a. LAT 21°10.1'S, LONG 004°53.9'E N b. LAT 21°14.0'S, LONG 004°55.0'E Y c. LAT 21°18.0'S, LONG 005°00.5'E N d. LAT 22°42.0'S, LONG 004°57.0'E 1247: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 5.6 mph Y b. 4.4 mph N c. 2.1 mph N d. 1.8 mph 1501: On 3 October , your 0330 zone time (ZD + 5) DR position is LAT 47°41'N, LONG 86°49'W. At that time, you observe Polaris bearing 357.5°pgc. The chronometer time of the observation is 08h 32m 04s, and the chronometer is 0m 27s slow. The variation is 5.5°W. What is the gyro error?
N a. 7.5°E N b. 5.0°E N c. 3.5°E Y d. 2.0°E 1650: On 22 October , in DR position LAT 21°51.0'S, LONG 76°24.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256°psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2°E. What is the deviation of the standard magnetic compass?
N a. 0.3°E Y b. 0.3°W N c. 2.0°E N d. 2.0°W 1685: As you approach Buckridge Light (mile 412.5 AHP), which type of daymark would you see on the light structure?
N a. Red square N b. Green square N c. Red diamond Y d. Green diamond 1740: On what river is Ghent, Kentucky located?
N a. Tennessee N b. Mississippi N c. Missouri Y d. Ohio 1762: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1175 x 75 feet Y b. 1190 x 75 feet N c. 1195 x 84 feet N d. 1202 x 84 feet 1958: 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 2009: On 16 July , your 1920 ZT DR position is LAT 25°36.0'N, LONG 172°18.9'W. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Rasalhague, Spica, Arcturus Y b. Venus, Antares, Vega N c. Vega, Mars, Antares N d. Saturn, Acrux, Spica 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 2367: At 0850, 4 January, you pass the Gage at Natchez, MS which reads 26.8 feet. The low water reference plane (LWRP) for Natchez is 6.1 feet. What is the water level in relation to the low water reference plane?
N a. 20.7 ft below Y b. 20.7 ft above N c. 32.9 ft below N d. 32.9 ft above 2425: You are taking a time tick using the 2100 signal from Callao, Peru. You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 09h 00m 07s. When compared to the chronometer, the comparing watch reads 09h 01m 12s, and the chronometer reads 08h 59m 32s. What is the chronometer error?
Y a. 1m 33s slow N b. 0m 28s slow N c. 1m 05s fast N d. 0m 07s fast 2656: You are steering 257°T, and a light is picked up dead ahead at a distance of 13.3 miles at 2016. You change course to pass the light 4 miles off abeam to starboard. If you are making 18.5 knots, what is your ETA at the position 4 miles off the light?
Y a. 2057 N b. 2100 N c. 2103 N d. 2113 2719: If the Gage at the Greenville Highway Bridge reads 22.0 feet, and the low water reference plane (LWRP) for Greenville (Bridge). MS is 11.3 feet. What is the water level in relation to the low water reference plane?
N a. 22.1 feet below the LWRP N b. 10.7 feet below the LWRP Y c. 10.7 feet above the LWRP N d. 0.5 feet below the LWRP 2788: The solid lines extending into the channel at mile 948 AHP are __________.
Y a. dikes N b. revetments N c. spoil areas N d. Meadwestvaco pipeline 2861: Your vessel is on a course of 196°T at 17 knots. At 0417 a light bears 218.5°T, and at 0442 the light bears 241°T. At what time and at what distance off will your vessel be when abeam of the light?
Y a. 0500, 5.0 miles N b. 0504, 6.2 miles N c. 0500, 6.2 miles N d. 0504, 5.0 miles 3072: If the speed necessary for reaching port at a designated time is 17.4 knots and the pitch of the propeller is 25.6 feet, how many revolutions per minute will the shaft have to turn, assuming a 3% positive slip?
N a. 63 N b. 67 Y c. 71 N d. 75 3106: You are turning 85 RPM, with a propeller pitch of 19 feet, and an estimated slip of +3%. What is the speed of advance?
N a. 14.7 knots Y b. 15.5 knots N c. 16.4 knots N d. 17.1 knots 3629: You desire to make good a true course of 129°. The variation is 7°E, magnetic compass deviation is 4°E, and gyrocompass error is 2°W. An easterly wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?
Y a. 114°psc N b. 116°psc N c. 122°psc N d. 126°psc 10106: What is the course per standard magnetic compass from Chesapeake Light to North Chesapeake Entrance Lighted Whistle Buoy NCA?
N a. 316°psc Y b. 321°psc N c. 323°psc N d. 326°psc 10203: Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming there is no set and drift, what course must you steer per standard magnetic compass (psc) to arrive at a position 3 miles due north of Horton Point Light?
N a. 077°psc N b. 081°psc Y c. 085°psc N d. 088°psc 10204: Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming that there is no set and drift, what course must you steer per standard magnetic compass (psc) to arrive at a position 5 miles due south of Saybrook Breakwater Light?
N a. 089°psc Y b. 080°psc N c. 077°psc N d. 066°psc 11009: What best describes the structure from which Stratford Point Light is shown?
N a. Brown conical tower with white horizontal band in center of light on black pier N b. Red conical tower on brown cylindrical pier N c. White octagonal house on brown cylindrical pier Y d. White conical tower, with brown band midway of height 12900: Your 1302 position is LAT 37°14.7'N, LONG 76°22.7'W. You are turning for 9.6 knots. What is your ETA at Trestle C of the Chesapeake Bay Bridge and Tunnel if you follow York River Entrance Channel?
N a. 1516 Y b. 1505 N c. 1500 N d. 1451 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 13300: The soundings on this chart are measured in __________.
Y a. feet N b. yards N c. fathoms N d. meters 13705: The broken magenta lines (long and short dashes) in and around Mobjack Bay (LAT 37°20'N, LONG 76°22'W) indicate __________.
N a. amphibious training areas N b. grounds for dredge spoil Y c. fish trap areas N d. gunnery exercise areas 15006: You are on course 192°pgc at 12 knots.
At 1900 your position is:
Latitude 37° 22.6' North
Longitude 075° 35.7' West
Which of the following is true?
N a. if you maintain course and speed you will pass Hog Island Bell Buoy "2" to stbd N b. you are inside the 3 nm territorial sea Y c. your fathometer reads 30' N d. None of the above 15010: At 1950, your position is LAT 37°12.3'N, LONG 75°38.6'W. The set and drift from 1930 to 1950 were __________.
N a. 150°T at 0.6 knot Y b. 150°T at 1.6 knots N c. 330°T at 0.6 knot N d. 330°T at 1.6 knots 15209: At 1800, Tue Marshes Light bears 264.5°pgc, York Spit Swash Channel Light "3" bears 007°pgc. Your position is __________.
N a. LAT 37°15.5'N, LONG 76°19.8'W N b. LAT 37°15.2'N, LONG 76°20.3'W N c. LAT 37°15.0'N, LONG 76°20.0'W Y d. LAT 37°14.5'N, LONG 76°20.1'W 15543: At 2236 Falkner Island Light bears 024° true at a range of 8.6 nm
What was the speed made good along the track line since your 2200 fix?
N a. 12.7 knots Y b. 13.5 knots N c. 13.9 knots N d. 14.2 knots 15757: If you change course at 0610, what is the course to steer per gyro compass to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")?
N a. 072°pgc Y b. 076°pgc N c. 080°pgc N d. 084°pgc 15945: At 2107 Southeast Point Light bears 062°T, and at 2112 this light bears 038°T. What is your distance off Southeast Point Light at 2112? (assume no set and drift)
N a. 2.1 miles Y b. 2.5 miles N c. 2.9 miles N d. 3.3 miles 15961: At 1810, a red buoy bears 010° relative. This buoy marks __________.
N a. the side of York Spit Channel N b. the visibility limit of the red sector of Cape Henry Light N c. a submerged obstruction in York Spit Channel Y d. the York River Entrance Channel 16112: 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?
N a. 185°pgc N b. 187°pgc N c. 190°pgc Y d. 193°pgc 16513: At 0748, you change course to 160°T. What loran reading can you follow to remain on this course?
Y a. 9960-W-14651.0 N b. 9960-W-14660.0 N c. 9960-Y-43852.0 N d. 9960-Y-43943.8 16538: At 2216 your position is LAT 41°16.0'N, LONG 72°08.0'W. Which statement is TRUE?
Y a. You are in the red sector of New London Harbor Light. N b. Your fathometer reads approximately 40 feet. N c. You will cross the Colregs Demarcation Line if you continue on your present course. N d. Little Gull Island Light bears 339°T at 4.3 miles. 16608: At 2142, you take the following bearings:
Stratford Point Light 331°T
Stratford Shoal Middle Ground Light 280°T
Old Field Point Light 223°T
What is your 2142 position?
Y a. LAT 41°03.0'N, LONG 73°01.7'W N b. LAT 41°03.1'N, LONG 73°02.1'W N c. LAT 41°03.1'N, LONG 73°01.3'W N d. LAT 41°03.3'N, LONG 73°01.9'W