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.
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 184: At 1930, your position is LAT 37°16.7'N, LONG 75°37.7'W. The depth of water is approximately __________.
N a. 40 feet (12.2 meters) Y b. 50 feet (15.2 meters) N c. 60 feet (18.3 meters) N d. 70 feet (23.2 meters) 256: At 0209, your position is LAT 41°01.8'N, LONG 72°40.8'W. What course should you steer per standard magnetic compass to make good 278° magnetic? (assume no set and drift)
N a. 262.0°psc N b. 265.0°psc N c. 270.5°psc Y d. 275.5°psc 256: At 0209, your position is LAT 41°01.8'N, LONG 72°40.8'W. What course should you steer per standard magnetic compass to make good 278° magnetic? (assume no set and drift)
N a. 262.0°psc N b. 265.0°psc N c. 270.5°psc Y d. 275.5°psc 305: A vessel steams 666 miles on course 295°T from LAT 24°24'N, LONG 83°00'W. What are the latitude and longitude of the point of arrival by mid-latitude sailing?
N a. LAT 29°01'N, LONG 94°18'W Y b. LAT 29°06'N, LONG 94°16'W N c. LAT 29°10'N, LONG 94°10'W N d. LAT 29°13'N, LONG 94°06'W 339: The coastline by Cape Henry is best described as __________.
N a. rocky with pine scrubs N b. low wetlands Y c. sandy hills about eighty feet high N d. low and thinly wooded with many beach houses 408: You depart LAT 37°36'N, LONG 123°00'W, and steam 2022 miles on course 241°T. What is the longitude of your arrival by Mercator sailing?
N a. LONG 163°28.2'W N b. LONG 163°18.2'W Y c. LONG 156°51.7'W N d. LONG 154°18.3'W 810: On 13 October , your 0515 zone time (ZT) fix gives you a position of LAT 26°53.0'N, LONG 90°05.0'W. Your vessel is on course 068°T, and your speed is 7.8 knots. Local apparent noon (LAN) occurs at 1145 zone time, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 54°51.5'. What is the calculated latitude at LAN?
Y a. 27°12.6'N N b. 27°14.1'N N c. 27°15.7'N N d. 27°16.2'N 997: On 20 November , your 0612 zone time (ZT) position was LAT 25°38.0'N, LONG 166°54.0'W. Your vessel was steaming on course 126°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0854 ZT. The chronometer read 07h 51m 14s and was slow 02m 52s. The observed altitude (Ho) was 27°58.3'. LAN occurred at 1147 ZT. The observed altitude (Ho) was 45°35.0'. What was the longitude of your 1147 ZT running fix?
N a. 165°20.2'W N b. 165°18.4'W N c. 165°15.8'W Y d. 165°12.5'W 1125: Where would you find out which buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP)?
Y a. Local Notice to Mariners N b. Bulletin board at the Rosedale Gage N c. Waterways Journal N d. None of the above 1130: 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 1216: It is 8 March and you are keeping zone time -3. You are on course 104°T, speed 21 knots. Your 0830 DR position is LAT 25°35.0'S, LONG 66°34.0'E. What is the time of the second estimate of LAN by ship's clocks?
Y a. 10h 41m 26s N b. 11h 15m 34s N c. 11h 17m 32s N d. 11h 36m 54s 1237: At 1118, on 24 May, you pass Natchez Gage and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at Cairo, IL if you continue to turn for 10 mph?
N a. 0840, 26 May N b. 2218, 26 May Y c. 2339, 27 May N d. 0339, 28 May 1293: What is indicated by the two light gray shaded areas that cross the river above False River Lt. (mile 251.0 AHP)?
Y a. Utility crossings N b. Ferry crossings N c. Aerial cable crossings N d. Bridge construction 1479: On 6 November , your vessel's 0706 zone time DR position is LAT 25°30.0'N, LONG 85°35.0'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 01h 03m 30s, and the Sun is bearing 114.0°pgc. The chronometer error is 02m 30s slow, and the variation in the area is 2°.
What is the gyro error?
N a. 0.8°E N b. 0.8°W N c. 2.0°W Y d. 2.0°E 1503: On 30 July , your 0200 zone time (ZD +4) DR position is LAT 43°48'N, LONG 78°00 W. At that time, you observe Polaris bearing 008.7°psc. The chronometer time of the observation is 05h 58m 07s, and the chronometer is 0m 23s slow. The variation is 10.5°W. What is the deviation of the magnetic compass?
N a. 0.5°E Y b. 3.0°E N c. 7.5°W N d. 18.0°W 1712: What is the distance from Cairo Point, IL, to Arkansas City?
N a. 28 miles N b. 110 miles N c. 218 miles Y d. 400 miles 1755: The U. S. Coast Guard facility at mile 361 AHP is represented by which numbered white square on your map?
Y a. 8 N b. 11 N c. 12 N d. 13 1763: At 2126, you pass Morganza Bend Light (mile 278.4 AHP).
At 0226, 4 January, you pass Red River Landing Gage (mile 302.4 AHP). You have been turning for 7.5 mph. What is the current?
N a. 1.4 mph N b. 1.8 mph Y c. 2.7 mph N d. 6.2 mph 1838: What is the distance from Baton Rouge, LA, to St. Louis, MO, on the Mississippi River System?
N a. 1038 miles Y b. 916 miles N c. 690 miles N d. 352 miles 1958: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)?
Y a. Green square N b. Green triangle N c. Green diamond N d. Red square 2114: At 0209, your position is LAT 41°01.8'N, LONG 72°40.8'W.
What course should you steer per standard magnetic compass to make good 278° magnetic? (assume no set and drift)
N a. 262.0°psc N b. 265.0°psc Y c. 275.5°psc N d. 280.5°psc 2202: After entering Milliken Bend (mile 455 AHP) you wish to locate the river service in Madison Parish, Louisiana. The river service is indicated by the square containing which number?
N a. 5 Y b. 4 N c. 3 N d. 2 2279: You observe the lower limb of the Sun at a sextant altitude (hs) of 58°06.6' on 5 April . The index error is 1.0' off the arc. The height of eye is 55 feet (16.8 meters). What is the observed altitude (Ho)?
N a. 58°14.2' Y b. 58°15.8' N c. 58°16.9' N d. 58°18.1' 2587: What VHF frequency would you use to listen to a weather forecast for the eastern part of Long Island Sound?
N a. 156.65 MHz N b. 156.85 MHz Y c. 162.475 MHz N d. 162.775 MHz 2865: You are steering a course of 240°T, and a lighthouse bears 025° on the starboard bow at 2116. At 2144 the same lighthouse bears 050° on the starboard bow, and you have run 6 miles since the first bearing. What is the ETA when the lighthouse is abeam?
N a. 2156 N b. 2159 Y c. 2202 N d. 2205 2883: Your vessel is steering 157°T at 18 knots. At 2018 a light bears 208°T. At 2044 the same light bears 232°T. What will be your distance off when abeam?
N a. 12.8 miles Y b. 14.4 miles N c. 15.2 miles N d. 16.7 miles 3293: Your vessel consumes 274 barrels of fuel per day at a speed of 17.5 knots. What will be the fuel consumption of your vessel at 13.5 knots?
Y a. 126 bbls N b. 163 bbls N c. 211 bbls N d. 253 bbls 3618: Your vessel is steering course 027° per standard magnetic compass (psc), variation for the area is 19°W, and deviation is 2°E. The wind is from the north-northwest, producing a 5° leeway. What true course are you making good?
N a. 005°T Y b. 015°T N c. 044°T N d. 049°T 3630: You desire to make good a true course of 203°. The variation is 19°E, magnetic compass deviation is 2°W, and gyrocompass error is 1°E. A westerly wind produces a 3° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 183°psc Y b. 189°psc N c. 210°psc N d. 223°psc 3760: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 352°T, and the variation is 4°W. If the heading of your vessel at the time of the sighting is 359° per standard magnetic compass, what is the correct deviation?
Y a. 3°W N b. 7°E N c. 11°E N d. 11°W 3771: Two beacons form a range in the direction of 221.5°T. The range is seen in line from your vessel bearing 223° per gyro compass. The variation in the area is 4°E. What is the error of your gyro compass?
Y a. 1.5°W N b. 2.5°W N c. 5.5°W N d. 2.5°E 10709: At 0726 you depart Lake Montauk with light 1 close aboard and set course 065° per standard magnetic compass at 6.7 knots. At 0912 your GPS position is LAT 41°10.5'N, LONG 71°46.6'W. What is the current?
N a. 151°T at 1.2 knots N b. 164°T at 0.7 knot N c. 227°T at 0.9 knot Y d. 240°T at 1.4 knots 11409: At 0647 your position is LAT 41°08.6'N, LONG 72°41.6'W. At 0729 your position is LAT 41°10.3'N, LONG 72°29.2'W. What were your true course and speed made good?
N a. 074° at 9.5 knots Y b. 080° at 13.6 knots N c. 253° at 9.7 knots N d. 258° at 13.5 knots 11500: At 2016 your GPS position is LAT 41°07.6'N, LONG 71°37.8'W. At 2128 your GPS position is LAT 41°00.4'N, LONG 71°29.4'W. What was the speed made good between the two positions?
N a. 11.9 knots N b. 10.2 knots Y c. 8.0 knots N d. 7.4 knots 13100: Your position is LAT 41°15.2'N, LONG 71°50.1'W at 1347. You are turning for 6.9 knots. What is your ETA at Shagwong Reef Buoy "7SR"?
Y a. 1506 N b. 1515 N c. 1521 N d. 1527 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 15046: As you pass through the Chesapeake Bay Bridge and Tunnel,
you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316°
pgc and 329°psc. What is the deviation on that heading?
N a. 3°E N b. 1°E Y c. 1°W N d. 9°W 15046: As you pass through the Chesapeake Bay Bridge and Tunnel,
you take a bearing of 047°pgc along trestle C when it is in line. The helmsman reports the vessel's heading as 316°
pgc and 329°psc. What is the deviation on that heading?
N a. 3°E N b. 1°E Y c. 1°W N d. 9°W 15066: If you correct for the current in the preceding question (035°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. 1016 Y b. 1021 N c. 1026 N d. 1030 15116: According to your track line, how far off New Point Comfort Spit Light "4" will you be when abeam of this light?
Y a. 0.9 mile N b. 1.2 miles N c. 1.5 miles N d. 1.8 miles 15410: You arrive at Cape Charles City at 1700 and depart at 1800. You are underway in Chesapeake Bay and encounter heavy fog. At 1830, you obtain the following radar readings:
Old Plantation Flats Light @ 1.9 nm
New Point Comfort Light bearing 301° true @ 10.55 nm
What is your 1830 position?
N a. LAT 37°10.3'N, LONG 76°04.5'W N b. LAT 37°10.3'N, LONG 76°06.5'W Y c. LAT 37°12.3'N, LONG 76°04.4'W N d. LAT 37°12.3'N, LONG 76°06.5'W 15419: The mean high water level at Old Point Comfort is __________.
Y a. 2.6 feet (0.8 meters) N b. 1.2 feet (0.4 meters) N c. 0.0 feet N d. -3.5 feet (-1.1 meters) 15461: At 0908, you change course to 010°T. What course should you steer per standard magnetic compass?
N a. 003° N b. 017° Y c. 021° N d. 359° 15708: Which structure should you look for while trying to locate Southwest Ledge Light?
N a. White conical tower with a brown band midway of height Y b. White octagonal house on a cylindrical pier N c. Conical tower, upper half white, lower half brown N d. Black skeleton tower on a granite dwelling 15770: At 0930, your position is LAT 41°16.5'N, LONG 71°41.4'W, and you are turning for 7 knots. Allowing 3° leeway for northerly winds and estimating the current as 035° at 0.3 knot, what is the course to steer (pgc) to point "B"?
N a. 084°pgc Y b. 086°pgc N c. 091°pgc N d. 094°pgc 15844: Your course made good from 2045 to 2111 is __________.
N a. 187°T N b. 190°T Y c. 193°T N d. 196°T 15907: At 0720, you are in the outer channel between buoy "1" and buoy "2" and change course to pass Townshend Ledge Lighted Gong Buoy "10A" abeam to port at 200 yards. What is your ETA off the buoy?
N a. 0734 Y b. 0738 N c. 0741 N d. 0745 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 16215: The wind is southerly, and you estimate 3° leeway. Allowing for leeway, what is the course to steer from your 0745 position to pass 1 mile south of Watch Hill Buoy "WH"?
N a. 079°pgc N b. 081°pgc N c. 085°pgc Y d. 087°pgc 16262: What was the speed made good from 0240 to 0400?
N a. 5.2 knots N b. 5.6 knots Y c. 6.0 knots N d. 6.4 knots 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