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.
112: Which of the following statements regarding buoys on the Mississippi River is TRUE?
Y a. Buoys should be given as wide a berth as possible in passing. N b. Buoy positions on the chart are exact. N c. The buoys are maintained on station year round. N d. The buoys do not shift positions due to permanent moorings. 209: At 0705, you take the following bearings:
Watch Hill Light 034.5°pgc
Latimer Reef Light 338.0°pgc
Race Rock Light 268.0°pgc
What was the true course made good between 0645 and 0705?
Y a. 253°T N b. 256°T N c. 263°T N d. 266°T 241: Little Gull Island Light is __________.
N a. lighted only during daytime when the sound signal is in operation Y b. lighted throughout 24 hours N c. maintained only from May 1 to Oct 1 N d. obscured by trees from 253° to 352° 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 334: Your gyro and electronic gear are again operating. At 1710, Chesapeake Light bears 137°pgc at 6.6 miles. The current is setting 160°T at 2 knots. At your speed of 6 knots, what is your true course to steer to remain in the inbound traffic lane?
N a. 250° N b. 261° N c. 265° Y d. 269° 572: At 0908, you change course to 010°T. What course should you steer per standard magnetic compass?
N a. 359° Y b. 021° N c. 017° N d. 003° 581: At 1119, Wolf Trap Light bears 268°T at 4.4 miles by radar. What were the set and drift since your 1037 fix?
Y a. 358°, 0.7 knot N b. 358°, 0.5 knot N c. 178°, 0.7 knot N d. 178°, 0.5 knot 703: 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 Map Y d. None of the above 812: On 28 July , your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?
N a. 26°25.0'N Y b. 26°27.6'N N c. 26°29.8'N N d. 26°32.0'N 814: On 1 July , your 0515 zone time fix gives you a position of LAT 23°24.0'S, LONG 151°42.0'W. Your vessel is on course 240°T, and your speed is 10.0 knots. Local apparent noon (LAN) occurs at 1215 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 42°55.0'. What is the latitude at 1200 ZT?
N a. 24°02.5'S N b. 24°01.0'S Y c. 23°59.7'S N d. 23°58.6'S 1096: On 24 October , your 0100 DR position is LAT 27°42'N, LONG 158°35'E. You are on course 085°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0700 running fix. NP-0026
N a. LAT 27°48.8'N, LONG 160°12.5'E N b. LAT 27°52.5'N, LONG 160°18.2'E Y c. LAT 27°56.0'N, LONG 159°47.3'E N d. LAT 27°58.4'N, LONG 159°43.5'E 1249: What is the white/black within a circle symbol found at mile 592.1 AHP?
N a. Terrence Landing Light N b. Daymark Y c. River Gage N d. Information Board 1262: On 27 September , your 0345 ZT DR position is LAT 26°18.0'S, LONG 4°18.0'W. You are on course 271°T at a speed of 15 knots. What will be the zone time of sunrise at your vessel?
N a. 0525 N b. 0545 N c. 0555 Y d. 0605 1294: What are the light characteristics of Greenwood Light (mile 288.6 AHP)?
N a. Fixed red light Y b. 2 red flashes every 5 seconds N c. 1 red flash every 4 seconds N d. 2 white flashes every 4 seconds 1500: On September 9 , your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error?
Y a. 0.7°E N b. 1.2°E N c. 0.8°W N d. 9.4°W 1643: Which facility is located on the right descending bank at mile 363.6 AHP?
N a. River Cement Corps.. N b. Bunge Corps.. N c. T.L. James Y d. Vidalia Dock and Storage Co. 1688: As you approach Ashland Light (mile 378.1 AHP), which type of daymark would you see on the light structure?
N a. Green square N b. Green triangle N c. Red diamond Y d. Red triangle 1701: The latest available information on the channel conditions above Baton Rouge that includes the latest buoy information, as well as recommended courses, is found in the __________.
N a. Corps. of Engineers maps N b. Waterways Journal Y c. Local Notice to Mariners N d. Sailing Directions 1732: You estimate the current at 2.0 mph. What is the speed over the ground?
N a. 3.5 mph Y b. 4.5 mph N c. 7.5 mph N d. 9.5 mph 1811: Where would you find out which buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP)?
Y a. Notice to Mariners N b. Bulletin board at the Rosedale Gage N c. Waterways Journal N d. None of the above 1899: On 22 May , your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 116°T at an observed altitude (Ho) of 11°27.8'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?
N a. Markab Y b. Diphda N c. Sabik N d. Hamal 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 1917: On 14 January , your 1922 DR position is LAT 27°18.5'S, LONG 67°18.0'E. You observe an unidentified star bearing 054°T at an observed altitude (Ho) of 07°52.1'. The chronometer reads 03h 25m 43s, and is 03m 15s fast. What star did you observe?
N a. Elnath N b. Fomalhaut Y c. Pollux N d. Markab 1927: 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 (253.6 AHP)?
N a. 6.9 mph Y b. 6.2 mph N c. 4.8 mph N d. 4.3 mph 1954: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks?
Y a. 1444, 27 Aug N b. 2214, 27 Aug N c. 0844, 28 Aug N d. 1454, 28 Aug 2003: On 20 June , your 1742 zone time DR position is LAT 24°55.0'S, LONG 8°19.6'E. Considering their magnitude, azimuth, and altitude, which three stars are best suited for a fix at star time?
Y a. Regulus, Canopus, Antares N b. Spica, Arcturus, Alioth N c. Arcturus, Achernar, Pollux N d. Avior, Sabik, Fomalhaut 2012: On 24 March , your vessel is enroute from Cadiz to Norfolk. Evening twilight will occur at 1830 zone time, and your vessel's DR position will be LAT 35°06'N, LONG 60°48'
W. Considering their azimuth, altitude, and magnitude,
which group of stars is best suited for plotting a star fix at star time?
N a. Adhara, Rigel, Suhail N b. Regulus, Denebola, Alkaid N c. Adhara, Procyon, Alphard Y d. Sirius, Dubhe, Mirfak 2088: At your current speed of 19 knots you only have enough fuel remaining to travel 265 miles. You must travel 731 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 13.8 N b. 12.6 Y c. 11.4 N d. 10.2 2159: On 25 May , your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?
N a. 069.6°T N b. 110.4°T N c. 249.6°T Y d. 290.4°T 2370: As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground, if your vessel is making turns for 10.5 mph?
N a. 16.5 mph Y b. 13.5 mph N c. 10.5 mph N d. 7.5 mph 2534: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
N a. 0557, April 19th N b. 1045, April 19th Y c. 1242, April 19th N d. 1733, April 19th 2662: You are on course 006°T, speed 16.6 knots. At 0516 you see a light bearing 008°T at a range of 10.2. If you change course at 0528 to leave the light abeam to port at 1.0 mile,
at what time will the light be abeam?
Y a. 0553 N b. 0556 N c. 0604 N d. 0607 2696: You are underway on course 059°T at a speed of 13.8 knots.
You sight a light bearing 064°T at a radar range of 5.1 miles at 1839. If you change course at 1845, what is the course to steer to leave the light abeam to starboard at 1.0 mile?
N a. 047°T Y b. 050°T N c. 053°T N d. 058°T 2699: You are underway on course 137°T at a speed of 16.2 knots. You sight a rock bearing 134°T at a radar range of 4.6 miles at 1508. If you change course at 1514, what is the course to steer to leave the rock abeam to port at 1.5 miles?
Y a. 162°T N b. 158°T N c. 154°T N d. 151°T 2780: Which type of daymark will you see as you approach Old Levee Light (mile 385.2 AHP)?
N a. Green diamond N b. Red square Y c. Green square N d. Private aid - no daymark 2866: Your vessel is on a course of 311°T at 21 knots. At 1957 a light bears 337.5°T, and at 2018 the light bears 356°T. At what time and at what distance off will your vessel be when abeam of the light?
N a. 2027, 5.2 miles N b. 2033, 6.8 miles Y c. 2039, 7.4 miles N d. 2043, 10.3 miles 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 3290: While steaming at 15.5 knots, your vessel consumes 333 barrels of fuel oil per day. In order to reduce consumption to 176 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 11.3 knots Y b. 12.5 knots N c. 13.6 knots N d. 14.8 knots 3610: While enroute from Sydney to the Panama Canal a vessel's true course is 071°. Variation is 14°E. Deviation is 4°W. A northerly breeze causes 2° leeway. What course would you steer psc in order to make good the true course?
Y a. 059°psc N b. 061°psc N c. 063°psc N d. 079°psc 4002: 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 true heading of 258°.
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. 0.5°W N b. 0.0° N c. 0.5°E Y d. 1.0°E 12708: You are on course 302° per standard magnetic compass when you take the following bearings: Little Gull Island Light 283°psc Race Rock Light 311°psc Latimer Reef Light 027°psc What is your position?
N a. LAT 41°12.2'N, LONG 71°57.6'W N b. LAT 41°12.4'N, LONG 71°57.4'W N c. LAT 41°12.4'N, LONG 71°57.9'W Y d. LAT 41°12.6'N, LONG 71°57.6'W 13006: Your 1600 position is LAT 41°08.0'N, LONG 72°44.8'W. You are making turns for 14 knots. What is your ETA at Mattituck Inlet?
N a. 1636 N b. 1643 Y c. 1647 N d. 1651 15167: Your height of eye is 25 feet (7.6 meters). If the visibility is 11 nautical miles, what is the luminous range of Wolf Trap Light?
N a. 8.2 miles Y b. 12.0 miles N c. 16.0 miles N d. 17.0 miles 15263: What do the dotted lines around Goose Island and Kimberly Reef represent?
N a. Danger soundings N b. Breakers N c. Tide rips Y d. Depth contours 15710: From your 0830 position, you wish to make good 097°T. There is no current, but a southerly wind is producing 3°
leeway. What course should you steer per standard magnetic compass in order to make good your true course?
N a. 118°psc Y b. 115°psc N c. 112°psc N d. 109°psc 15729: If the Rosedale Gage reads -0.5 feet, what is the water level if the low water reference plane for Rosedale is 3.0 feet?
N a. 0.5 foot below the plane N b. 0.5 foot above the plane N c. 2.5 feet above the plane Y d. 3.5 feet below the plane 15917: At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?
N a. 5.9 nm N b. 6.9 nm N c. 12.0 nm Y d. 12.8 nm 16063: At 2013, you sight Thimble Shoal Light in line with Old Point Comfort Light bearing 258°pgc. At the time of the bearing, the vessel was headed 142°pgc and 151°psc. Based on this, you __________.
N a. know the gyro error is 2°E N b. should adjust the magnetic compass N c. verified that the variation is 10°W Y d. have checked the deviation table for a magnetic heading of 150° 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 16261: At 0400 you take the following bearings:
Sand Shoal Inlet South Light bearing 299°pgc
Cape Charles Light bearing 242°pgc
What is your 0400 position?
N a. LAT 37°14.2'N, LONG 75°39.2'W Y b. LAT 37°14.4'N, LONG 75°39.3'W N c. LAT 37°14.4'N, LONG 75°39.0'W N d. LAT 37°14.6'N, LONG 75°39.2'W 16442: The area bounded by the buoys "C51" to "C47A" to "M6" to "M14", west of your anchorage, is __________.
N a. a training area for naval small craft N b. restricted to oil and mineral exploration N c. an anchorage for ammunition barges Y d. a fish trap area 16545: At 0030 you alter course and speed to make good 265°T at 10 knots. What is your ETA at a point where Stratford Shoal Middle Ground Light is abeam?
N a. 0218 N b. 0223 N c. 0228 Y d. 0233 16708: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?
Y a. 263°psc N b. 258°psc N c. 233°psc N d. 227°psc