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.
42: What is the distance from Greenville, MS, to St. Louis, MO, on the Mississippi River System?
N a. 832 miles N b. 733 miles Y c. 597 miles N d. 566 miles 48: The Clinch River empties into which river?
N a. Arkansas N b. Mississippi Y c. Tennessee N d. Ohio 113: What is indicated by the two light gray shaded areas that cross the river above False River Lt. (mile 251.0 AHP)?
N a. Ferry crossings Y b. Utility crossings N c. Aerial cable crossings N d. Bridge construction 182: What course should you steer using the standard magnetic compass (psc) to make good the course of 192°pgc?
N a. 188°psc Y b. 203°psc N c. 205°psc N d. 208°psc 188: At 2020, what is the course to steer to enter the inbound lane of North Chesapeake Entrance traffic separation scheme if a northwesterly wind causes 3° of leeway?
N a. 227°pgc Y b. 221°pgc N c. 218°pgc N d. 215°pgc 236: 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. 109°psc N b. 112°psc Y c. 115°psc N d. 118°psc 371: You are steering 087°pgc and turning for 6.8 knots. At 0600, you take the following bearings:
Little Gull Island Light bearing 089.5° pgc
Bartlett Reef Light bearing 047° pgc
What is your 0600 position?
N a. LAT 41°11.2'N, LONG 72°14.6'W N b. LAT 41°11.7'N, LONG 72°14.4'W Y c. LAT 41°12.1'N, LONG 72°13.8'W N d. LAT 41°12.5'N, LONG 71°14.9'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 482: 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 longitude of the vertex, given the latitude of the vertex as 37°34.9'N.
N a. 25°49.8'W N b. 25°53.2'W Y c. 25°59.0'W N d. 26°03.4'W 486: What is your speed from your 0630 position, with Buoy "PI" close abeam, to your 0654 position?
N a. 11.4 knots Y b. 10.5 knots N c. 9.3 knots N d. 8.2 knots 489: At 0728, Race Rock Light is bearing 282°T at 3.8 miles, and the closest point on Fishers Island is at a radar range of 2.1 miles. What speed have you been making since you changed course at 0705?
N a. 11.4 knots N b. 10.6 knots Y c. 9.9 knots N d. 9.2 knots 546: At 0705, you take the following bearings:
Watch Hill Light 030.5°pgc
Latimer Reef Light 329.0°pgc
Race Rock Light 262.0°pgc
What was the true course made good between 0645 and 0705?
N a. 266°T N b. 263°T Y c. 256°T N d. 252°T 642: Where can scheduled broadcast times of river stages be found?
N a. Sailing Directions Y b. Light List N c. List of Lights N d. Coast Pilot 651: You are planning a voyage by great circle from Reykjavik (LAT 63°30'N, LONG 24°00'W) to the Azores (LAT 39°30'N, LONG 29°00'W). Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. The distance is measured in sixty-mile segments based on the length of a degree of latitude at the mid-latitude and mid-longitude position. N b. The Northern Hemisphere vertex lies south of Reykjavik. Y c. The great circle track is not appreciably shorter than a rhumb line track. N d. When plotted on a Mercator chart, the great circle track will be convex to the British Isles. 678: Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from Valdez, AK, to Hilo, HI, is TRUE.
Y a. A great circle track is not significantly shorter than a rhumb line track. N b. You will cross the Northern Hemisphere vertex where the track line crosses LAT 45°N. N c. Distance is measured by using the length of a degree of longitude at the mid-latitude line. N d. When plotted on a Mercator chart, the track line will be convex to San Francisco. 823: On 15 October , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1146 ZT. Your DR position is LAT 22°42.0'N, LONG 139°52.0'E, and your sextant altitude (hs) is 58°30.4'. The index error is 3.4' on the arc, and your height of eye is 56.7 feet. The chronometer time of the observation is 02h 45m 06s, and the chronometer error is 01m 06s slow. Find the latitude at meridian transit from the ex-meridian observation.
N a. LAT 22°29.1'N Y b. LAT 22°35.2'N N c. LAT 22°58.1'N N d. LAT 23°20.6'N 981: On 20 September , your 0730 zone time position was LAT 28°58.0'N, LONG 152°26.0'W. Your vessel was steaming on course 225°T at a speed of 19.0 knots. An observation of the Sun's lower limb was made at 0931 ZT. The chronometer read 07h 29m 20s and was slow 02m 22s. The observed altitude (Ho) was 44°14.4'. LAN occurred at 1206 zone time. The observed altitude (Ho) was 62°49.5'. What was the longitude of your 1200 zone time running fix?
N a. LONG 153°32.5'W N b. LONG 153°27.2'W Y c. LONG 153°23.5'W N d. LONG 153°20.0'W 1278: On 17 April , your vessel is enroute from the Panama Canal to Kobe, Japan. Your 0400 zone time DR position is LAT 26°12.0'N, LONG 126°12.0'W. Your vessel is on course 285°T at a speed of 18 knots. What will be the zone time of sunrise at your vessel?
N a. 0535 N b. 0541 N c. 0552 Y d. 0602 1419: Which light will you be passing at 0059, on 22 September, if you make good 9.2 knots?
Y a. Obion Bar Lt. N b. Kate Aubrey Lt. N c. Trotter Lt. N d. Quaker Oats Lt. 1483: On 31 May , your vessel's 1420 zone time DR position is LAT 29°06'N, LONG 120°06'W, when an azimuth of the Sun is observed. The bearing of the Sun per standard magnetic compass was 255.3°. The chronometer time of the observation is 10h 17m 24s. The chronometer error is 02m 32s slow. The variation for this area is 12.9°E. What is the deviation of the standard magnetic compass?
Y a. 2.5°W N b. 2.9°W N c. 2.9°E N d. 3.2°E 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 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 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 1880: On 13 September , your 1830 ZT DR position was LAT 23°03'S, LONG 105°16'E when you observed a faint unidentifiable star through a hole in the clouds. The star bore 265.0°T at a sextant altitude (hs) of 62°25.4'. The chronometer read 11h 24m 39s and is 5m 08s slow. The index error is 1.0' off the arc, and the height of eye is 52 feet. What star did you observe?
N a. Sigma Ophiuchi N b. Alcyone Y c. Dschubba N d. Gamma Lupi 2026: On 10 June , your 1712 zone time DR position is LAT 25°10.0'S, LONG 06°58.0'E. You are on course 213°T at a speed of 9.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
N a. Procyon, Antares, Sirius N b. Sirius, Procyon, Regulus N c. Acrux, Canopus, Regulus Y d. Acrux, Procyon, Arcturus 2030: 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. 2082: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?
N a. 42.5 feet (12.9 meters) N b. 51.0 feet (15.5 meters) Y c. 59.5 feet (18.0 meters) N d. 60.4 feet (18.4 meters) 2118: You are northwest of Port Jefferson Harbor steering 242°
per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________.
N a. 140°psc N b. 146°psc Y c. 157°psc N d. 160°psc 2277: You observe the lower limb of the Sun at a sextant altitude (hs) of 41°29.8' on 11 January . The index error is 2.4' off the arc. The height of eye is 68 feet. What is the observed altitude (Ho)?
N a. 41°36.4' Y b. 41°39.4' N c. 41°42.0' N d. 41°44.5' 2280: You observe the lower limb of the Sun at a sextant altitude (hs) of 28°24.7' on 17 May . The index error is 1.5' off the arc. The height of eye is 86 feet (26 meters). What is the observed altitude (Ho)?
N a. 28°29.7' N b. 28°30.6' Y c. 28°31.5' N d. 28°32.9' 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 2328: As you pass through the Chesapeake Bay Bridge and Tunnel, you sight Trestle "B" in line bearing 018°pgc. What is the gyro error by observation?
N a. 2°E Y b. 0° N c. 2°W N d. 4°W 2456: You have steamed 520 miles at 22 knots and burning 319 barrels of fuel per day. You must decrease your consumption to 137 barrels per day with 410 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 12.8 N b. 14.8 Y c. 16.2 N d. 18.2 2681: Your vessel is on course 312°pgc and you sight a lighthouse dead ahead at a range of 10 miles. The gyro error is 3°E. What course would you steer to leave the lighthouse 1.5 miles abeam to starboard?
N a. 309°pgc Y b. 304°pgc N c. 309°T N d. 304°T 2852: Your vessel is on a course of 129°T at 13 knots. At 1937 a light bears 151.5°T. At 2003 the light bears 174°T. At which time and distance off will your vessel be when abeam of this light?
N a. 2016, 2.8 miles N b. 2016, 3.9 miles Y c. 2021, 3.9 miles N d. 2021, 2.8 miles 2886: Your vessel is steering 074°T at 12 knots. At 0214 a light bears 115°T, and at 0223 the same light bears 135°T. What will be your distance off abeam?
N a. 2.4 miles Y b. 3.0 miles N c. 3.5 miles N d. 4.2 miles 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 3087: If the pitch of the propeller is 20.6 feet, and the revolutions per day are 107,341, calculate the day's run allowing 3% positive slip.
Y a. 352.7 miles N b. 363.6 miles N c. 374.5 miles N d. 389.1 miles 3264: You have steamed 1134 miles at 10 knots, and consumed 121 tons of fuel. If you have to steam 1522 miles to complete the voyage, how many tons of fuel will be consumed while steaming at 12 knots?
N a. 146 tons N b. 189 tons N c. 200 tons Y d. 234 tons 3280: While steaming at 14.5 knots, your vessel consumes 319 barrels of fuel oil per day. In order to reduce consumption to 217 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 9.8 knots N b. 11.9 knots Y c. 12.8 knots N d. 13.5 knots 10508: 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 1000 your position is LAT 37°00.5'N, LONG 75°37.0'W. What was the set and drift?
N a. 010° at 0.5 knot N b. 017° at 1.0 knot N c. 020° at 0.4 knot Y d. 032° at 0.9 knot 11106: What is the height of the tide at Great Salt Pond, on Block Island, at the morning high water (daylight savings time) on 1 July 1983?
N a. 1.3 feet Y b. 2.3 feet N c. 3.2 feet N d. There is no morning high water 12100: You sight Wolf Trap Light in line with New Point Comfort Spit Light "2" bearing 040° per standard magnetic compass. You are on course 319° per standard magnetic compass. Based on this, you __________.
Y a. know the compass error is 8°W N b. should apply 3°Easterly deviation to the bearing N c. know the deviation table is incorrect N d. should suspect the compass may be affected by a local magnetic disturbance 14703: At 0800 your vessel is at mile 110 proceeding in an easterly direction on the Columbia River. At 1030 Reed Island is abeam to port as you pass the 125 mile mark. What has been your average speed in knots?
N a. 4.3 knots Y b. 5.2 knots N c. 8.7 knots N d. 10.0 knots 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 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 15542: At 2214 you receive a "Securite" call requesting you to remain at least 2 miles away from underwater work taking place at LAT 41°07.8'N, LONG 72°34.6'W. If you change course at 2220 and allow 3° leeway for southerly winds which course will you steer per gyrocompass to comply with this request? No allowance made for current.
N a. 079°pgc N b. 083°pgc N c. 086°pgc Y d. 089°pgc 16041: From your 0847 fix, you change course to arrive at the rendezvous position and, correcting for current, you estimate your speed over the ground at 15 knots. What is your ETA at the rendezvous?
N a. 0902 N b. 0905 Y c. 0908 N d. 0911 16120: At 0812, you are on course 132°T. The standard magnetic compass reads 135°. What should you conclude?
N a. The deviation table is correct for that heading. N b. You should adjust the magnetic compass. Y c. Your compass may be influenced by a local magnetic disturbance. N d. The deviation is increasing as you go south. 16144: From your 2027 position you change course to 106°T, while maintaining an engine speed of 18 knots. Your ETA at a position where Block Island Sound South Entrance Obstruction Lighted Buoy "BIS" is abeam is __________.
N a. 2039 N b. 2043 N c. 2047 Y d. 2050 16315: 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 N b. LAT 41°11.9'N, LONG 72°49.5'W Y c. LAT 41°12.1'N, LONG 72°48.6'W N d. LAT 41°12.5'N, LONG 72°44.3'W 16462: Which statement about your 0400 position is TRUE?
Y a. You are within the territorial sea and contiguous zone. N b. You are governed by the Inland Rules of the Road. N c. The ocean floor is composed of shale. N d. Anchoring, trawling and fishing are prohibited.