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.
110: As you pass under the Baton Rouge RR and Highway 190 bridge you receive a call from another tow upriver. What channel on the VHF should you be monitoring?
N a. 1 Y b. 13 N c. 16 N d. 67 207: If your height of eye is 35 feet (10.7 meters), what is the approximate geographic range of Block Island North Light?
N a. 7.4 nm N b. 13.0 nm Y c. 15.8 nm N d. 17.5 nm 245: On chart 12354, the datum from which heights of objects are taken is __________.
N a. lowest low water N b. mean low water Y c. mean high water N d. mean lower low water 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 341: You are on course 082°T, and the engines are turning for 8 knots. At 0352, you take the following bearings:
Stratford Point Light 016°pgc Stratford Shoal (Middle Ground) Light 137°pgc
What is your 0352 position?
Y a. LAT 41°05.2'N, LONG 73°07.8'W N b. LAT 41°05.4'N, LONG 73°07.3'W N c. LAT 41°05.3'N, LONG 73°07.5'W N d. LAT 41°05.4'N, LONG 73°07.7'W 364: As you pass through the Chesapeake Bay Bridge and Tunnel, you sight Trestle "A" in line bearing 198°pgc. What is the gyro error?
N a. 2°E N b. 0°E N c. 1°W Y d. 2°W 377: You depart LAT 22°35.0'N, LONG 157°30.0'W, and steam 4505.0 miles on course 135°T. What are the latitude and longitude of your arrival by Mercator sailing?
Y a. 30°30.5'S, 102°35.3'W N b. 30°30.5'S, 104°30.0'W N c. 32°20.0'S, 102°35.3'W N d. 32°20.0'S, 104°30.0'W 391: A vessel at LAT 40°42.0'N, LONG 74°01.0'W, heads for a destination at LAT 14°41.0'N, LONG 17°26.0'W. Determine the true course and distance by Mercator sailing.
N a. 123°T, 3066.5 miles N b. 123°T, 3065.6 miles N c. 118°T, 3066.5 miles Y d. 118°T, 3365.0 miles 401: Your vessel receives a distress call from a vessel reporting her position as LAT 35°01'S, LONG 18°51'W. Your position is LAT 30°18'S, LONG 21°42'W. Determine the true course from your vessel to the vessel in distress by Mercator sailing.
N a. 135°T N b. 149°T Y c. 153°T N d. 160°T 449: You estimate the current to be 160°T at 1.2 knots. What should your course and speed be in order to make good 000°T at 10 knots?
N a. 358°T at 09.8 knots Y b. 358°T at 11.1 knots N c. 002°T at 11.2 knots N d. 002°T at 09.9 knots 459: Determine the great circle distance and initial course from LAT 25°47.0'N, LONG 79°59.5'W to LAT 38°42.0'N, LONG 09°10.5'W.
N a. 3341.0 miles, 063°T N b. 3347.0 miles, 063°T N c. 3427.8 miles, 061°T Y d. 3588.6 miles, 059°T 520: On 29 June you observe the star Achernar at a sextant altitude (Hs) of 54°18.9'. The index error is 4.7' off the arc. The height of eye is 58 feet. What is the observed altitude (Ho)?
N a. 54°06.1' Y b. 54°15.5' N c. 54°31.5' N d. 54°43.7' 544: From your 0600 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0 miles if a southerly wind is producing 3° of leeway?
N a. 262°pgc N b. 258°pgc N c. 256°pgc Y d. 252°pgc 609: At 0915 zone time, on 7 April , you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Kobe, LAT 34°40.0'N, LONG 135°12.0'E, and you estimate your speed of advance at 17 knots. The distance is 4,819 miles. What is your estimated zone time of arrival at Kobe?
N a. 0343, 18 April N b. 1243, 19 April Y c. 2143, 19 April N d. 0443, 20 April 1118: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
Y a. 1190 X 75 feet N b. 1185 X 84 feet N c. 1190 X 84 feet N d. 1185 X 75 feet 1128: How far is it to the Hernando Desoto Bridge in Memphis, TN?
N a. 980.8 miles N b. 736.6 miles N c. 312.3 miles Y d. 218.1 miles 1146: The Linwood Bend revetment on the LMR extends from mile __________.
N a. 828.1-823.1 RDB N b. 831.7-829.4 RDB N c. 845.4-842.5 LDB Y d. 841.3-838.7 LDB 1188: On 9 February , your 0830 zone time DR position is LAT 22°19.0'N, LONG 64°37.0'E. Your vessel is on course 128°
T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1152 N b. 1156 N c. 1201 N d. 1205 1213: It is 23 November and you are keeping zone time +4. You are on course 262°T, speed 21 knots. Your 0800 DR position is LAT 24°30.0'N, LONG 48°40.0'W. What is the time of the second estimate of LAN by ship's clocks?
Y a. 11h 05m 54s N b. 11h 34m 22s N c. 12h 06m 02s N d. 12h 08m 36s 1236: 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. 1255: On 12 June , your 0400 ZT DR position is LAT 22°31.0'N, LONG 31°45.0'W. You are on course 240°T at a speed of 16.5 knots. What will be the zone time of sunrise at your vessel?
N a. 0507 N b. 0515 Y c. 0523 N d. 0645 1271: At 0400 zone time, on 24 June , your DR position is LAT 23°10.0'N, LONG 085°33'W. You are steering 295°T at a speed of 10.0 knots. What is the zone time of sunrise?
N a. 0452 Y b. 0458 N c. 0504 N d. 0510 1461: On 27 June , your 0734 zone time DR position is LAT 22°14.0'N, LONG 53°52.0'W. At that time, you observe the Sun bearing 069.5°psc. The chronometer reads 11h 32m 51s and the chronometer error is 01m 26s slow. The variation is 5°E. What is the deviation of the standard magnetic compass?
Y a. 1.6°E N b. 2.9 W N c. 2.9°E N d. 3.2°E 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 1495: On 9 September , your 2043 ZT position is LAT 24°18'N, LONG 66°46'W. You observe Polaris bearing 001°pgc. At the time of the observation the helmsman noted that he was heading 031°pgc and 040°psc. The variation is 11°W. What is the deviation for that heading?
N a. 0° N b. 1°W N c. 3°W Y d. 2°E 1538: At 1032 on 24 June, you pass Carolina Landing Light(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 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 2061: As you approach mile 225 AHP, you notice on the map a black broken line crossing the river at mile 224.2 AHP. This line indicates __________.
N a. ferry crossing N b. submarine crossing N c. gas pipelines Y d. power lines 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 2241: At 1318 ZT, on 10 September , in DR position LAT 24° 05.8' N, LONG 058° 08.3' E, you observe an amplitude of the Moon. The upper limb of the Moon is on the visible horizon and bears 254° psc. Variation is 2° W. What is the deviation?
N a. 8.0°W N b. 8.0°E Y c. 4.0°W N d. 4.0°E 2284: You observe the lower limb of the Sun at a sextant altitude (hs) of 35°26.3' on 25 June . The index error is 1.5' on the arc. The height of eye is 58 feet (17.6 meters). What is the observed altitude (Ho)?
N a. 35°28.2' N b. 35°29.9' Y c. 35°32.1' N d. 35°36.7' 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 2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?
N a. 035°pgc Y b. 043°pgc N c. 051°pgc N d. 059°pgc 2709: If the highest point of your towboat is 54 feet above the water and the Natchez Gage reads 24.8 feet, what will be your vertical clearance when passing under the Natchez-Vidalia westbound Highway Bridge?
N a. 35.9 feet Y b. 47.2 feet N c. 49.6 feet N d. 57.5 feet 2894: You are steaming on a course of 071°T at 19 knots. At 1907 you observe a lighthouse bearing 122°T. At 1915 the lighthouse bears 154°T. What is your distance off at the second bearing?
N a. 3.4 miles Y b. 3.7 miles N c. 4.0 miles N d. 4.3 miles 3255: You have steamed 836 miles at 14.5 knots, and consumed 191 tons of fuel. If you have 310 tons of usable fuel remaining, how far can you steam at 17 knots?
N a. 842 miles Y b. 987 miles N c. 1157 miles N d. 1865 miles 10108: What is the base course per standard magnetic compass while southbound in the middle leg of York Spit Channel?
N a. 161.0°psc N b. 165.5°psc N c. 180.0°psc Y d. 184.0°psc 10201: Your present position is LAT 41°05.5'N, LONG 72°38.0'W. Assuming that there are no set and drift, what course must you steer per standard magnetic compass (psc) to arrive at a position 0.5 mile due south of New Haven Lighted whistle Buoy NH?
N a. 315.5°psc Y b. 310.5°psc N c. 290.5°psc N d. 284.5°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 10306: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to LAT 41°00.0'N, LONG 71°40.0'W?
N a. 145.5°psc Y b. 142.5°psc N c. 138.5°psc N d. 127.0°psc 10307: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to a position 0.5 mile due south of Race Rock Light?
Y a. 324°psc N b. 328°psc N c. 331°psc N d. 339°psc 10607: At 0912 your GPS position is LAT 41°04.9'N, LONG 72°42.1'W. You are on course 085° per standard magnetic compass at a speed of 6 knots. At 1052 your GPS position is 0.5 mile due south of Twenty-Eight Foot Shoal Lighted Buoy "TE". What were your set and drift?
N a. 145°T at 1.2 knots N b. 148°T at 0.9 knot N c. 320°T at 1.3 knots Y d. 325°T at 0.7 knot 11408: At 1930 your GPS position is LAT 41°08.6'N, LONG 72°41.6'W. At 2024 your position is LAT 41°00.5'N, LONG 72°49.5'W. What is your true course and speed made good?
N a. 219° at 10.1 knots Y b. 216° at 11.2 knots N c. 039° at 9.9 knots N d. 036° at 11.1 knots 12302: You are on course 203° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 194° per standard magnetic compass. Based on this you __________.
N a. know the correct deviation is 3°W Y b. should swing your vessel to check the deviation table N c. should apply 15°W compass error to all compass readings N d. know you are steering a true course of 185° 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 14201: The draw of the Burlington Northern railroad bridge across the Columbia River at mile 328.0 shall be opened on signal, without prior notice, from __________.
N a. 6:00 am to 6:00 pm N b. 6:00 pm to 6:00 am N c. 8:00 pm to 4:00 am Y d. 8:00 am to 4:00 pm 15018: What course per standard magnetic compass (psc) is the same as 247°pgc?
N a. 240°psc N b. 246°psc Y c. 257°psc N d. 260°psc 15070: As you enter New London Harbor, you are steering on the entrance range. The lights are in line over the bow as you are heading 352°pgc. What is the gyro error?
Y a. 2°E N b. 0° N c. 1°W N d. 3°W 15313: From your noon position, if there is no set and drift, what is your course per standard magnetic compass to the "NCA"
(LL #375) buoy?
N a. 215°psc Y b. 217°psc N c. 219°psc N d. 221°psc 15318: You passed Cape Henry Light at 0730 outbound at maximum flood. What approximate current can you expect on entering Chesapeake Channel?
N a. Slack before ebb N b. Slack before flood N c. Ebb current Y d. Flood current 15715: Little Gull Island Light is __________.
N a. lighted only during daytime when the sound signal is in operation N b. maintained only from May 1 to Oct 1 Y c. lighted throughout 24 hours N d. obscured by trees from 253° to 352° 15966: The yellow buoys on either side of your vessel that lead to Mobjack Bay mark __________.
N a. the limits of the dredged channel Y b. fish trap areas N c. underwater cable areas N d. ferry routes 16015: By 0430, the wind has increased, and the visibility cleared due to passage of a front. You estimate 3° leeway due to NW'ly winds. What is the course per gyrocompass to pass 1.2 miles due south of Twenty-eight Foot Shoal Lighted Buoy "TE"?
Y a. 080° N b. 083° N c. 086° N d. 090° 16016: At 0430, you change course and speed to make good 090°T at 10 knots. At 0433, you slow due to an engineering casualty and estimate you are making good 5.5 knots. At what time will Branford Reef Light bear 000°T?
N a. 0601 Y b. 0609 N c. 0620 N d. 0624 16019: The south shore of Long Island Sound from Horton Point to Orient Point is __________.
N a. low and marshy Y b. bluff and rocky N c. marked by sandy beaches and wooded uplands N d. bound by gradual shoaling