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.
141: Your vessel is making turns for 9.5 mph and you estimate the average current for the trip will be 2.5 mph. What will be your ETA Donaldsonville, LA?
Y a. 1222 on 7 October N b. 1823 on 7 October N c. 0443 on 8 October N d. 1033 on 8 October 208: From your 1850 fix, you come left to a course of 280°T,
while maintaining a speed of 10 knots. Which of the following combinations of available Loran-C lines would be best for position determination?
N a. 9960-X and 9960-Y Y b. 9960-Y and 9960-W N c. 9960-W and 9960-X N d. All are equally good. 277: What chart should you use after you enter New London Harbor?
N a. 13211 N b. 13214 Y c. 13213 N d. 13272 287: If the visibility is 11 miles, what is the luminous range of New Point Comfort Spit Light "4"?
N a. 6.5 mile Y b. 5.0 miles N c. 3.3 miles N d. 2.0 miles 322: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.)
N a. 2355 Y b. 2344 N c. 2335 N d. 2324 405: You depart LAT 33°45.0'N, LONG 118°30.0'W, and steam 2216 miles on course 250°T. What is the longitude of your arrival by Mercator sailing?
N a. LONG 156°08.0'W N b. LONG 156°36.0'W N c. LONG 157°21.0'W Y d. LONG 157°31.0'W 430: At 0820, you change course to 301°psc and reduce speed to 7.5 knots. At 0900, you take the following visual bearings:
Branford Reef Light 023°psc
New Haven Light 293°psc
Tweed Airport Aerobeacon 332°psc
Your 0900 position is __________.
N a. LAT 41°11.9'N, LONG 72°50.6'W Y b. LAT 41°12.1'N, LONG 72°48.6'W N c. LAT 41°12.3'N, LONG 72°47.7'W N d. LAT 41°12.5'N, LONG 72°44.3'W 443: At 1104, Watch Hill Point Light is in line with Stonington Outer Breakwater Light, the range to the south tip of Watch Hill Point is 2.6 miles and the range to the beach is 1.9 miles. You are steering to make good 075°T, speed 10.0 knots. At 1110, you change course to head for a position of LAT 41°05.0'N, LONG 71°50.0'W. What is the true course?
N a. 193° Y b. 190° N c. 187° N d. 185° 464: Determine the great circle distance and initial course from LAT 33°53.3'S, LONG 18°23.1'E to LAT 40°27.0'N, LONG 73°49.4'W.
N a. 6648.0 miles, 298.7°T N b. 6743.5 miles, 302.7°T N c. 6750.8 miles, 235.5°T Y d. 6763.0 miles, 304.5°T 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 683: Which type of daymark would you see on the Belle Island Corner Lt. at mile 458.6 AHP?
N a. Green - Diamond N b. Green - Square N c. Red - Triangle Y d. Red - Diamond 735: On 22 August , your 1852 zone time DR position is LONG 155°54.0'E. At that time you observe Polaris with a sextant altitude (hs) of 27°36.9'. The chronometer time of the sight is 08h 54m 06s, and the chronometer error is 02m 20s fast. The index error is 3.6' off the arc, and the height of eye is 61.5 feet. What is your latitude by Polaris?
N a. 27°05.5'N N b. 27°31.0'N Y c. 28°05.9'N N d. 28°09.5'N 998: On 23 May , your 0628 zone time position was LAT 28°18.0'S, LONG 102°42.0'E. Your vessel was steaming on course 040°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0758 ZT. The chronometer read 01h 02m 06s and was fast 04m 04s. The observed altitude (Ho) was 13°16.7'. LAN occurred at 1201 zone time. The observed altitude (Ho) was 42°32.0'. What was the longitude of your 1201 zone time running fix?
N a. 103°57.9'E N b. 104°00.4'E Y c. 104°03.5'E N d. 104°06.3'E 1150: 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?
Y a. 53.2 feet N b. 58.1 feet N c. 68.2 feet N d. 96.3 feet 1163: What is the mile point of the Fulton Gage?
N a. 598 AHP N b. 632 AHP N c. 687 AHP Y d. 778 AHP 1242: The solid lines extending into the channel at mile 948 AHP are __________.
Y a. dikes N b. revetments N c. spoil areas N d. Westvaco Service Facilities 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 1270: At 0500 zone time, on 21 August , your DR position is LAT 47°00'N, LONG 125°15'W. You are steering 000°T at a speed of 9.8 knots. What is the zone time of sunrise?
Y a. 0525 N b. 0529 N c. 0531 N d. 0535 1489: On 23 July , your 2100 ZT position is LAT 36°43.0'N, LONG 16°09.8'W, when you observed an azimuth of Polaris to determine the compass error. Polaris bears 359.0° per gyrocompass. At the time of the observation, the helmsman noted that he was heading 319.0° per gyrocompass and 331.0° per standard compass. Variation is 12.0°W. Which of the following statements is TRUE?
N a. The gyro error is 0.7°E. N b. The gyro error is 1.7°W. Y c. The deviation is 1.7°E. N d. The compass error is 13.7°W 1499: On 16 June , your 0430 zone time DR position is LAT 29°24.0'S, LONG 36°16.0'E. At that time, you observe Vega bearing 341.0°psc. The chronometer reads 02h 32m 06s, and the chronometer error is 01m 54s fast. The variation is 20.5°W. What is the deviation?
N a. 3.2°E N b. 3.2°W Y c. 2.4°W N d. 2.8°E 1708: At 0300 on 19 April, you pass under the Greenville Bridge (mile 531.3 AHP). What was your average speed since departing Amoco Pipeline Co. Docks (mile 253.6 AHP)?
N a. 6.2 mph N b. 5.2 mph N c. 4.8 mph Y d. 4.3 mph 1720: As you approach mile 427.6 AHP, you see on the right side a white buoy with orange bands and open face diamond. This buoy shows __________.
N a. safe water N b. preferred channel Y c. danger N d. special marks 1957: At 1923, on September 21, you pass Bixby Towhead Light (mile 873.7 AHP). What was your average speed since leaving Cairo?
N a. 9.2 mph N b. 8.8 mph Y c. 8.5 mph N d. 7.2 mph 2154: On 30 June , at 0630 zone time, morning stars were observed, and the vessel's position was determined to be LAT 25°15.0'S, LONG 175°36.0'E. Your vessel is steaming at 16.0 knots on a course of 302°T. A sextant observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 10h 14m 38s, and the sextant altitude is 32°07.9'. The index error is 4.5' on the arc, and the chronometer error is 01m 25s slow. Your height of eye on the bridge is 58.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
Y a. 035.3°T N b. 144.7°T N c. 186.5°T N d. 248.5°T 2164: On 6 March , at 0550 zone time, morning stars were observed, and the vessel's position was determined to be LAT 23°56.0'N, LONG 27°19.0'W. Your vessel is steaming at 25.0 knots on a course of 149.0°T. A sextant observation of the Sun's lower limb is made at 0830 zone time. The chronometer reads 10h 32m 05s, and the sextant altitude is 31°31.5'. The index error is 2.5' on the arc, and the chronometer error is 01m 45s fast. Your height of eye on the bridge is 76.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 109.8°T N b. 111.2°T Y c. 112.8°T N d. 114.3°T 2201: At 1000, on May 11th, you are passing George Prince Lt. (mile 364.1 AHP) in Natchez, Mississippi and must send an ETA to the Monsanto Terminal in St. Louis (mile 178.0 UMR). Your engines are still turning for 8.5 mph and you estimate the current at 2.5 mph. What will be your arrival time in St. Louis?
N a. 1919 on 15 May N b. 2344 on 15 May N c. 1113 on 16 May Y d. 1757 on 16 May 2677: You sight a light 9° on your starboard bow at a distance of 21 miles. Assuming you make good your course, what will be your distance off the light when abeam?
Y a. 3.3 miles N b. 3.7 miles N c. 4.0 miles N d. 4.3 miles 2705: While on a course of 192°T, a light bears 11° on the starboard bow at a distance of 12.7 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard?
N a. 167°T N b. 173°T N c. 185°T Y d. 189°T 2712: What is the length of the trip?
N a. 720.8 miles N b. 777.4 miles Y c. 897.2 miles N d. 906.3 miles 2913: You are turning for 7.5 mph and estimate the current at 3.0 mph. What is your ETA at the River Cement Co. in Natchez considering that you passed Cherokee Landing Lt. at 2100?
Y a. 1605 on 15 January N b. 0355 on 16 January N c. 1244 on 16 January N d. 1922 on 16 January 3097: If the pitch of the propeller is 19.4 feet, and the revolutions per day are 96,713, calculate the day's run allowing 6% positive slip.
N a. 266.4 miles Y b. 290.1 miles N c. 308.6 miles N d. 327.1 miles 3605: The true course from point A to point B is 317°. A SSW wind causes a 4° leeway, variation is 6°W and deviation is 1°E. What is the magnetic compass course to steer to make good the true course?
N a. 326°psc Y b. 318°psc N c. 313°psc N d. 308°psc 3765: Your vessel is proceeding up a channel steering on a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 249°T, and the variation is 14°E. If the heading of your vessel at the time of the sighting is 226° per standard magnetic compass, what is the correct deviation?
N a. 5°E N b. 5°W Y c. 9°E N d. 9°W 10506: At 0919 your position is LAT 37°00.0'N, LONG 75°30.0'W. You are on course 270°T at 8.7 knots. At 1031 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the set and drift?
N a. 239° at 0.8 knot Y b. 252° at 1.3 knots N c. 060° at 0.7 knot N d. 073° at 1.2 knots 11402: At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?
Y a. 259° at 22.6 knots N b. 245° at 23.1 knots N c. 079° at 22.8 knots N d. 065° at 25.5 knots 11804: Your engines are making turns for 8 knots and a northerly wind is causing 3° of leeway. There is a current of 220°T at 1.5 knots. What is the course to steer between Branford Reef Light and Faulkner Island Light?
Y a. 084°T N b. 095°T N c. 102°T N d. 108°T 12300: You are on course 244° per standard magnetic compass when you sight Block Island Southeast Point Light in line with Block Island Aero Beacon bearing 326° per standard magnetic compass. Based on this you __________.
N a. should swing your vessel to check the deviation table N b. know the compass error is 12°W N c. should suspect that there is a local magnetic disturbance Y d. should apply 3°W deviation to any bearing (psc) while on a heading of 244°psc 12600: You are on course 243° per standard magnetic compass when you take the following bearings: Falkner Island Light 342°psc Mattituck Inlet Light 207°psc Horton Point Light 112°psc What is your position?
N a. LAT 41°05.9'N, LONG 72°32.7'W N b. LAT 41°05.7'N, LONG 72°31.8'W Y c. LAT 41°05.5'N, LONG 72°32.6'W N d. LAT 41°05.3'N, LONG 72°31.9'W 12700: You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc Race Rock Light 289°psc What is your position?
N a. LAT 41°13.6'N, LONG 71°54.6'W N b. LAT 41°13.7'N, LONG 71°53.8'W N c. LAT 41°13.7'N, LONG 71°54.9'W Y d. LAT 41°13.8'N, LONG 71°54.3'W 13400: You are going to anchor at Gardiners Bay in LAT 41°04.5'N, LONG 72°13.0'W. What type of bottom should you expect?
N a. Streaked mud N b. Sand N c. Hard rocks Y d. Soft mud 14700: How many nautical miles are between mile 105 and mile 234 on the Columbia River?
Y a. 112.1 N b. 119.5 N c. 129.0 N d. 148.4 15369: Horton Point Light __________.
Y a. is shown from a white square tower N b. has a fixed green light N c. is 14 feet above sea level N d. is synchronized with a radio beacon 15443: As you enter Chesapeake Bay, visibility improves. At 2235 you are between Chesapeake Channel Buoys "5" and "6" in the 41 foot dredged section of Chesapeake Channel. At that time, you change course to pass between buoys "9" and "10". If buoys "11" and "12" are extinguished, your best leading light to keep you in deep water in the Chesapeake Channel, as you approach the Chesapeake Bay Bridge and Tunnel, would be __________.
N a. fixed red light on trestle "C" Y b. fixed green light on trestle "B" N c. fixed red light on trestle "B" N d. Thimble Shoal Light 15608: At 1630, you reach point A and come right to 204°T. Your engine speed is 12 knots. Your 1715, position is LAT 37°09.8'N, LONG 75°37.4'W. The current was __________.
N a. 067°T at 1.1 knots N b. 246°T at 1.1 knots Y c. 067°T at 1.5 knots N d. 246°T at 1.5 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 15722: What is your ETA at the Memphis Highway Bridge?
N a. 0828, 22 Sept Y b. 1052, 22 Sept N c. 1405, 22 Sept N d. 1813, 22 Sept 15809: At 0045, you obtain the following bearings:
Rocky Point lookout tower 072°T
Horton Point lighthouse 213°T
What were the set and drift between 0005 and 0045?
N a. 272°true, 0.9 knot N b. 272°true, 1.4 knots N c. 092°true, 0.9 knot Y d. 092°True, 1.4 knots 16045: The north shore of Long Island, from Horton Point to Orient Point,
is __________.
Y a. bluff and rocky N b. low and sparsely wooded N c. marked by long sandy beaches at low water N d. marshy and backed with sand dunes 16119: At 0812, you obtain the following radar information:
Cape Henry Light bearing 287° pgc @ 3.85 nm
What is your 0812 position?
N a. LAT 36°53.7'N, LONG 75°56.0'W N b. LAT 36°53.8'N, LONG 75°56.1'W N c. LAT 36°54.5'N, LONG 75°56.2'W Y d. LAT 36°54.6'N, LONG 75°55.8'W 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 16456: What is the course per standard magnetic compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?
Y a. 194°psc N b. 190°psc N c. 187°psc N d. 180°psc 16610: At 2142, you change course to make good 030°T and increase speed to 14 knots. You rendezvous with another vessel and receive fresh supplies while off New Haven Harbor lighted whistle buoy "NH". What is the light characteristic of this buoy?
N a. _ . N b. _ _ Y c. . _ N d. . . 16714: What was the current between 0520 and 0600?
N a. 201° at 1.0 knot N b. 201° at 1.5 knot N c. 021° at 1.0 knot Y d. 021° at 1.5 knots