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.
75: What is your ETA at the Memphis Highway Bridge?
N a. 1813, 22 Sept N b. 1405, 22 Sept Y c. 1052, 22 Sept N d. 0828, 22 Sept 139: What is the distance to Caruthersville Gage from Cape Girardeau?
N a. 54.4 miles Y b. 160.4 miles N c. 793.4 miles N d. 899.4 miles 164: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 53.0 feet N b. 64.2 feet Y c. 68.0 feet N d. 110.0 feet 166: If the Bayou Sara Gage reads -0.5 feet, the Low Water Reference Plane is 5.25. What is the water level in relation to the low water reference plane?
N a. 0.5 foot below the plane N b. 0.5 foot above the plane N c. 5.25 feet above the plane Y d. 5.75 feet below the plane 227: At 2037, you change course to make good a course of 016°T. There is no current, but a westerly wind is causing 3° leeway. What course per standard magnetic compass (psc) should you steer to make good the course 016°T?
Y a. 022°psc N b. 025°psc N c. 028°psc N d. 031°psc 278: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?
Y a. 162.55 MHz N b. 162.85 MHz N c. 181.15 MHz N d. 202.35 MHz 390: A vessel at LAT 29°38.0'N, LONG 93°49.0'W, heads for a destination at LAT 24°38.0'N, LONG 82°55.2'W. Determine the true course and distance by Mercator sailing.
N a. 115°T, 637 miles Y b. 117°T, 658 miles N c. 122°T, 648 miles N d. 126°T, 665 miles 409: A vessel steams 1082 miles on course 047°T from LAT 37°18.0'N, LONG 24°40.0'W. What is the latitude and longitude of the point of arrival by Mercator sailing?
N a. LAT 49°30.0'N, LONG 06°22.0'W N b. LAT 49°33.0'N, LONG 06°25.0'W Y c. LAT 49°36.0'N, LONG 06°28.0'W N d. LAT 49°39.0'N, LONG 06°31.0'W 444: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1220 Y b. 1215 N c. 1208 N d. 1157 458: Determine the great circle distance and initial course from LAT 38°42.0'N, LONG 09°10.5'W to LAT 32°05.0'N, LONG 81°05.0'W.
N a. 3402.0 miles, 072.5°T N b. 3412.6 miles, 085.8°T N c. 3432.0 miles, 278.3°T Y d. 3449.4 miles, 287.2°T 483: 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. The difference of longitude from the vertex to a point (X) on the great circle track is 10°W. Determine the latitude which intersects the great circle at point (X).
N a. 37°02.5'N Y b. 37°09.5'N N c. 37°15.6'N N d. 37°21.2'N 507: At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at 1.2 knots?
N a. 118° N b. 120° Y c. 129° N d. 132° 542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?
N a. 63°00.6' Y b. 63°01.5' N c. 63°02.9' N d. 63°04.1' 629: You are on a voyage from Belem, Brazil, to Mobile, AL. The distance from departure to arrival is 3150 miles. The speed of advance is 14.0 knots. You estimate a layover in San Juan, Puerto Rico, of 17.5 hours. If you took departure at 2200 (ZD +3h 30m), 26 February , what was your ETA (ZD +6) at Mobile?
N a. 1900, 8 March Y b. 2200, 8 March N c. 0400, 9 March N d. 2200, 9 March 1088: On 9 June , your 0000 DR position is LAT 26°14.0'S, LONG 176°38.1'E. You are on course 223°T, speed 17.8 knots. You observed 4 celestial bodies. Determine the latitude and longitude of your 0630 running fix.
Y a. LAT 27°44.7'S, LONG 174°57.1'E N b. LAT 27°46.2'S, LONG 175°03.0'E N c. LAT 27°41.2'S, LONG 175°01.2'E N d. LAT 27°38.5'S, LONG 175°06.3'E 1166: At 1032 on 24 June, you pass Carolina Landing Light(mile 508.8 AHP). What has been the average current since 2350, 23 June, if you have been making turns for 9.0 mph?
N a. 8.5 mph N b. 5.7 mph N c. 1.5 mph Y d. 0.5 mph 1254: On 19 July , your 1500 ZT DR position is LAT 28°25.0'N, LONG 120°28.0'W. You are on course 233°T at a speed of 10 knots. What will be the zone time of sunset at your vessel?
N a. 1842 N b. 1853 Y c. 1901 N d. 1909 1263: On 18 October , your 1330 ZT DR position is LAT 27°32.0'N, LONG 154°47.0'W. You are on course 115°T at a speed of 20 knots. What will be the zone time of sunset at your vessel?
N a. 1715 N b. 1729 Y c. 1742 N d. 1751 1426: What is the total length of the trip?
N a. 910.6 miles N b. 901.4 miles N c. 900.7 miles Y d. 873.7 miles 1541: At 0119, on 10 September, you pass Springfield Bend Lt. (mile 244.8 AHP) and estimate the current will average 2.5 mph for the remainder of your trip. What is your ETA at the mouth of the Ohio River if you are making turns for 8.5 mph?
N a. 1746, 12 September N b. 1244, 13 September Y c. 2329, 14 September N d. 0210, 15 September 1703: At 1218, on 16 March, you are passing the Vicksburg Gage (mile 437.0 AHP). What has been the average current since 0630, 15 March, if you have been making turns for 8.0 mph?
N a. 0.2 mph N b. 0.5 mph N c. 0.8 mph Y d. 1.2 mph 1806: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. U.S.C.G. Light List Y b. U.S.C.G. Local Notice to Mariners N c. Army Corps. of Engineers Navigation Chart N d. List of Buoys and Daymarks 1870: On 12 June , your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 313°T at a sextant altitude (hs) of 14°56.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
Y a. Menkalinan N b. Mirzam N c. Theta Aurigae N d. Alnitak 1920: On 17 March , your 0520 Dr position is LAT 27°23.0'N, LONG 39°42.0'W. You observe an unidentified star bearing 313°T at an observed altitude (Ho) of 43°03.8'. The chronometer reads 08h 22m 15s and is 01m 45s fast. What star did you observe?
N a. Altair Y b. Alkaid N c. Arcturus N d. Deneb 2052: 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 2168: On 22 July , at 0448 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°43.0'N, LONG 158°39.0'E. Your vessel is steaming at 21.0 knots on a course of 028°T. A sextant observation of the Sun's lower limb is made at 0956 ZT. The chronometer reads 10h 54m 27s, and the sextant altitude is 54°28.2'. The index error is 1.5' off the arc, and the chronometer error is 01m 38s slow. Your height of eye on the bridge is 56 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 080.9°T N b. 082.2°T N c. 084.2°T Y d. 086.9°T 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 2851: Your vessel is on a course of 297°T at 11 knots. At 0019 a light bears 274.5°T, and at 0048 the light bears 252°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 0102, 2.6 miles Y b. 0108, 3.7 miles N c. 0057, 4.6 miles N d. 0117, 5.0 miles 3070: If the speed necessary for reaching port at a designated time is 19.6 knots and the pitch of the propeller is 24.6 feet, how many revolutions per minute will the shaft have to turn, assuming a 5% positive slip?
N a. 76 Y b. 85 N c. 97 N d. 106 3272: Your vessel arrives in port with sufficient fuel to steam 775 miles at 17 knots. If you are unable to take on bunkers, at what speed must you proceed to reach your next port, 977 miles distant?
Y a. 15.1 knots N b. 15.8 knots N c. 17.2 knots N d. 17.7 knots 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 3634: You desire to make good a true course of 038°. The variation is 5°E, magnetic compass deviation is 4°W, and gyrocompass error is 4°W. A southeasterly wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 033°psc Y b. 041°psc N c. 043°psc N d. 047°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 11006: At what time will the first maximum flood occur 1 mile east of Old Field Point on 29 April 1983? (You are keeping daylight saving time ZD +4).
N a. 0957 N b. 1059 Y c. 1328 N d. 1423 11305: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 2000 your position is LAT 36°59.5'N, LONG 75°37.0'W. What was the speed made good?
N a. 5.6 knots N b. 6.6 knots Y c. 8.2 knots N d. 9.1 knots 11905: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive one mile due south of Block Island Southeast Point Light, if you are turning for 8.6 knots, the current is 130° at 1.2 knots, and a northerly wind causes 3° of leeway?
Y a. 061°T N b. 064°T N c. 067°T N d. 070°T 13004: At 1815 your position is LAT 41°05.5'N, LONG 72°47.3'W. You are making turns for 12.6 knots. What is your ETA at Plum Island Mid Channel Buoy PI (LAT 41°13.3'N, LONG 72°10.8'W)?
N a. 2019 N b. 2028 Y c. 2032 N d. 2038 13700: Local magnetic disturbances of up to how many degrees have been noted from Cape Henry to Currituck Beach Light?
N a. 2 degrees Y b. 6 degrees N c. 11 degrees N d. 17 degrees 13810: Which chart would you use if you planned to continue westward beyond the coverage of this chart?
Y a. 12363 N b. 12373 N c. 13205 N d. 13218 13810: Which chart would you use if you planned to continue westward beyond the coverage of this chart?
Y a. 12363 N b. 12373 N c. 13205 N d. 13218 14303: What is the height above the water of light No. 84 on the Columbia River below Bonneville lock & dam?
N a. 10 feet Y b. 14 feet N c. 18 feet N d. 24 feet 15038: At 0705 you obtained the following Loran readings:
9960-X-27091.2
9960-Y-41612.8
9960-Z-58744.2
What is your vessel's position?
N a. 37°20.4'N 75°30.2'W Y b. 37°20.8'N 75°29.9'W N c. 37°21.3'N 75°29.5'W N d. 37°21.2'N 75°30.4'W 15141: At 2146 your position is 40°51.3'N, 71°59.2'W. If your engine speed has been 13 knots, what were the set and drift of the current you encountered since your 2100 position?
N a. 115°true at 1.1 knots N b. 115°true at 1.5 knots N c. 295° true at 1.1 knots Y d. 295°true at 1.5 knots 15145: At 2357 your position is 41°09.0'N, 71°47.0'W and Montauk Point Light bears 216° true. You change to a course of 293° true and your speed is 14.5 knots. At 0012 Montauk Point Light bears 177° true. Which statement about your 0012 running fix is TRUE?
N a. You are being set to the north. Y b. The fathometer reading is about 14 fathoms. N c. You are governed by the Inland Rules of the Road. N d. The fathometer trace shows you passed over the 89 foot sounding. 15206: At 1730, your position is LAT 37°13.9'N, LONG 76°26.4'W. You are steering course 088° per standard magnetic compass (psc) at an engine speed of 8.0 knots. What is your distance off Tue Marshes Light at 1730?
Y a. 2.6 miles N b. 2.8 miles N c. 3.0 miles N d. 3.2 miles 15218: What is your 2118 position?
N a. LAT 36°57.0'N, LONG 76°01.5'W Y b. LAT 36°57.4'N, LONG 76°01.9'W N c. LAT 36°57.8'N, LONG 76°01.5'W N d. LAT 36°58.2'N, LONG 76°02.4'W 15308: From your 0315 position, what time can you expect to reach York Spit Channel Buoys "37" and "38"?
Y a. 0405 N b. 0412 N c. 0417 N d. 0423 15310: Which chart could you use for greater detail of the area at the south end of York Spit Channel?
Y a. 12222 N b. 12224 N c. 12226 N d. 12254 15312: You arrive at the rendezvous point, secure the tow, and head back southward. At 1200, you take the following bearings:
Cape Charles Light bearing 240.5° true
Sand Shoal Inlet South Light bearing 289° true
What is your 1200 position?
N a. LAT 37°10.5'N, LONG 75°33.0'W N b. LAT 37°12.0'N, LONG 75°35.0'W Y c. LAT 37°15.0'N, LONG 75°37.5'W N d. LAT 37°19.0'N, LONG 75°40.5'W 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 15862: At 0125, you change course to make good 280°T. What is the course per standard magnetic compass?
N a. 290°psc Y b. 292°psc N c. 294°psc N d. 296°psc 16741: At 2346 Montauk Point Light bears 285°pgc, and the radar range to Montauk Point is 5.9 miles. You are steering to make good 034°T. In order to remain westward of Southwest Ledge you should __________.
Y a. come left when South East Point Light bears 057° true N b. remain on your present course and you will clear Southwest Ledge N c. keep Block Island North Light bearing 033°T or less N d. alter course to the right when Block Island Aerobeacon bears 055°T