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.
60: What town is located at mile 389.8 AHP?
N a. Whitehall N b. Belmont Y c. Rodney N d. St. James 61: What is the width of the navigable channel at Grand Gulf Island Light (mile 404.9 AHP) ?
Y a. 0.455 mile N b. 0.62 miles N c. 0.71 mile N d. 0.8 miles 327: At 0315, you obtain the following bearings:
Wolf Trap Light bearing 091° true
Old Plantation Flats Light bearing 179° true
What is the true course from this position to the entrance of York Spit Channel?
N a. 217° N b. 211° Y c. 208° N d. 203° 354: The south shore of Long Island Sound from Horton Point to Orient Point is __________.
Y a. bluff and rocky N b. low and marshy N c. marked by sandy beaches and wooded uplands N d. bound by gradual shoaling 435: Which course should you change to per standard magnetic compass as you pass SW Ledge Light to remain in the channel?
N a. 026°psc Y b. 022°psc N c. 014°psc N d. 007°psc 478: The great circle distance from LAT 38°17'N, LONG 123°16'W to LAT 35°01'N, LONG 142°21'E is 4330 miles, and the initial course is 300.9°T. Determine the latitude of the vertex.
N a. 46°54.8'N N b. 47°24.7'N N c. 47°35.2'N Y d. 47°40.5'N 527: You depart LAT 25°54'N, LONG 9°38'E and steam 592 miles on course 270°. What is the longitude of arrival?
N a. 1°20'E N b. 0°40'E N c. 0°40'W Y d. 1°20'W 604: At 1820 zone time, on 21 March , you depart San Francisco, LAT 37°48.5'N, LONG 122°24.0'W (ZD +8). You are bound for Melbourne, LAT 37°49.2'S, LONG 144°56.0'E, and you estimate your speed of advance at 21 knots. The distance is 6,970 miles. What is your estimated zone time of arrival at Melbourne?
N a. 1214, 4 April N b. 2214, 4 April Y c. 0814, 5 April N d. 1314, 5 April 610: At 0820 zone time, on 10 April , you depart Yokohoma, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Honolulu, LAT 21°18.5'N, LONG 157°52.2'W (ZD +10) and you estimate your speed of advance at 17.5 knots. The distance is 3,397 miles. What is your estimated zone time of arrival at Honolulu?
N a. 0127, 17 April Y b. 1527, 17 April N c. 0127, 18 April N d. 0927, 18 April 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. 680: On which voyage would a great circle track provide a significant savings in distance to steam, when compared to a rhumb line track? (Use gnomonic tracking chart WOXZC 5270.)
N a. Valdez, AK, to the Marquesas Islands (LAT 8°00'S, LONG 140°00'W) N b. San Francisco to Kodiak, AK N c. Christmas Island (LAT 2°00'N, LONG 157°30'W) to Singapore via LAT 3°00'N, LONG 126°00'E Y d. Guam (LAT 14°00'N, LONG 145°00'E) to Seattle via LAT 47°30'N, LONG 125°30'W 825: On 15 August , an ex-meridian altitude of the Sun's lower limb at upper transit was observed at 1130 ZT. Your DR position is LAT 26°24.0'S, LONG 155°02.0'E, and your sextant altitude (hs) is 48°45.9'. The index error is 2.6' on the arc, and your height of eye is 51.5 feet. The chronometer time of the observation is 01h 27m 38s, and the chronometer error is 02m 14s slow. Find the latitude at meridian transit from the ex-meridian observation.
N a. LAT 26°32.6'S Y b. LAT 26°51.6'S N c. LAT 26°57.0'S N d. LAT 27°09.9'S 990: On 24 March , your 0800 zone time fix gives you a position of LAT 22°16.0'N, LONG 31°45.0'W. Your vessel is steaming a course of 285°T at a speed of 16.5 knots. An observation of the Sun's upper limb is made at 0938 zone time, and the observed altitude (Ho) is 46°32.2'. The chronometer reads 11h 41m 01s, and the chronometer error is 02m 50s fast. Local apparent noon occurs at 1214 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 68°55.8'. Determine the vessel's 1200 zone time position.
N a. LAT 22°35.0'N, LONG 30°29.0'W Y b. LAT 22°35.0'N, LONG 32°51.0'W N c. LAT 22°36.0'N, LONG 32°10.5'W N d. LAT 22°36.0'N, LONG 32°55.2'W 1093: On 22 Nov. , your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0'S, LONG 42°40.0'W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix. NP-0023
Y a. LAT 28°27.0'S, LONG 42°38.0'W N b. LAT 28°25.2'S, LONG 42°40.0'W N c. LAT 28°25.0'S, LONG 42°36.0'W N d. LAT 28°23.4'S, LONG 42°42.0'W 1136: The Arkansas City Yellow Bend revetment on the LMR extends from mile __________.
Y a. 555.0-549.7 RDB N b. 549.0-548.5 RDB N c. 556.9-554.9 LDB N d. 548.5-546.5 LDB 1175: On 12 February , your 0900 zone time DR position is LAT 16°43.0'N, LONG 51°42.0'W. Your vessel is on course 093°T at a speed of 18.5 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1237 N b. 1233 N c. 1230 N d. 1226 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 1243: What is the width of the widest span of the Cairo Highway Bridge (Upper Mississippi River mile 1.3)?
N a. 800 feet Y b. 675 feet N c. 625 feet N d. 503 feet 1265: On 22 November , your 1400 ZT DR position is LAT 22°16.0'N, LONG 136°37.0'E. You are on course 038°T at a speed of 22 knots. What will be the zone time of sunset at your vessel?
Y a. 1705 N b. 1710 N c. 1714 N d. 1718 1269: At 1400 zone time, on 11 April , your DR position is LAT 25°40'N, LONG 91°00'W. You are steering 180°T at a speed of 10.0 knots. What is your zone time of sunset?
N a. 1812 N b. 1816 N c. 1820 Y d. 1825 1292: Which of the following statements regarding buoys on the Mississippi River is TRUE?
N a. Buoy positions on the chart are exact. Y b. Buoys should be given as wide a berth as possible in passing. N c. The buoys are maintained on station year round. N d. The buoys do not shift positions due to permanent moorings. 1343: At 1019, on 10 March, you pass under the Greenville Bridge (mile 531.3 AHP). What was your average speed since departing River Cement Co. Dock?
Y a. 7.2 mph N b. 6.8 mph N c. 6.5 mph N d. 6.2 mph 1652: On 16 April , in DR position LAT 28°07.0'N, LONG 81°47.0'W, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 073.5°psc. The chronometer reads 10h 53m 41s and is 02m 23s slow. Variation in the area is 11°E. What is the deviation of the magnetic compass?
N a. 4.5°E N b. 4.9°W N c. 6.1°E Y d. 6.5°W 1739: The Delta-Friar Point revetment on the LMR extends from mile __________.
N a. 645.6 - 641.4 RDB N b. 652.8 - 649.6 RDB N c. 648.5 - 645.5 LDB Y d. 657.3 - 652.2 LDB 1757: What town is located at mile 395 AHP?
Y a. St. Joseph N b. Belmont N c. St. James N d. Rodney 1873: 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 174.0°T at a sextant altitude (hs) of 18°58.6'. 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. Muhlifain N b. Alpha Hydri N c. Almak N d. Alpha Muscae 2174: On 18 October , at 0518 ZT, morning stars were observed and the vessel's position was determined to be LAT 25°31.0'N, LONG 146°29.2'E. Your vessel is steaming at 19.0 knots on a course of 308°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 11h 17m 11s, and the sextant altitude (hs) is 34°51.4'. The index error is 2.0' off the arc, and the chronometer error is 01m 57s fast. Your height of eye on the bridge is 54.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 120.6°T N b. 121.9°T Y c. 125.5°T N d. 127.3°T 2178: On 26 July , your 1901 ZT position is LAT 28°28'N, LONG 157°16'E when you take an observation of Jupiter. The chronometer at the time of the sight reads 08h 54m 34s and is 06m 24s slow. The sextant altitude (hs) is 33°51.5'. The index error is 2.8'off the arc, and the height of eye is 48 feet. What are the azimuth (Zn) and intercept (a) for this sight using the assumed position?
N a. Zn 110.8°, a 32.0' T N b. Zn 249.2°, a 32.0' A Y c. Zn 248.2°, a 34.2' T N d. Zn 290.8°, a 44.2' A 2695: You are underway on course 017°T at a speed of 14.2 knots.
You sight a buoy bearing 025°T at a radar range of 3.7 miles at 1947. If you change course at 1953, what is the course to steer to leave the buoy abeam to starboard at 0.1 mile?
N a. 021°T N b. 024°T Y c. 027°T N d. 030°T 2700: You are underway on course 163°T at a speed of 15.8 knots.
You sight a buoy bearing 161°T at a radar range of 5.5 miles at 1319. If you change course at 1325, what is the course to steer to leave the buoy abeam to starboard at 1.0 mile?
Y a. 145°T N b. 148°T N c. 151°T N d. 175°T 3080: If the speed necessary for reaching port at a designated time is 21.6 knots and the pitch of the propeller is 22.5 feet, how many revolutions per minute will the shaft have to turn, assuming a 2% positive slip?
N a. 81 N b. 87 N c. 95 Y d. 99 3265: You have steamed 1587 miles at 11.2 knots, and have consumed one-half of your total fuel capacity of 2840 bbls. What is the maximum speed you can steam to complete the remaining 1951 miles?
N a. 9.1 knots N b. 9.9 knots Y c. 10.1 knots N d. 11.6 knots 4017: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a gyro heading of 196°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320°
N a. 2.0°E N b. 2.0°W N c. 1.0°W Y d. 0.0° 10604: At 2245 your GPS position is LAT 41°01.75'N, LONG 72°48.40'W. You are steering course 086° per standard magnetic compass at a speed of 6.0 knots. At 2400 you fix your position by plotting several compass bearings on nearby known fixed objects. These result in a position of LAT 41°04.20'N, LONG 72°38.85'W. What were your set and drift?
N a. 162°T at .2 knot N b. 180°T at .4 knot N c. 339°T at .5 knot Y d. 007°T at .4 knot 11702: You are eastbound in the Thimble Shoal Channel. What is the true heading to steer if the engines are turning for 9.5 knots, the current is 110°T at 1.2 knots, and a southerly wind causes 3° of leeway?
Y a. 111° N b. 108° N c. 105° N d. 100° 12304: You are on course 302° per standard magnetic compass when you sight Block Island Southeast Point Light in line with the Block Island Aero Beacon bearing 323° per standard magnetic compass. Based on this you __________.
Y a. know the deviation table is correct for that heading N b. know the deviation is 15°E N c. should swing your vessel to check the deviation table N d. know the deviation is equal to the variation 13301: The approach channel to the town of Cape Charles (LAT 37°16'N, LONG 76°01'W) has what controlling depth?
N a. 9 feet Y b. 17 feet N c. 20 feet N d. 40 feet 13306: In the northern quadrant of the circle surrounding Chesapeake Bay Entrance Junction Buoy CBJ the number 20 over a bracket appears 5 times. What do these indicate?
N a. Markers or piles are 20 feet above mean low water. N b. The maximum draft permitted in this area is 20 feet. Y c. Obstructions have been cleared by a wire drag to 20 feet. N d. Bench marks used to measure channel depths while dredging. 13701: Why are there no buoys charted at the approach to Sand Shoal Inlet (LAT 37°16'N, LONG 75°46'W)?
N a. No buoys are stationed there. N b. They frequently shift position due to heavy weather. Y c. They are frequently shifted to conform to the changing channel. N d. The buoys are being replaced with fixed lights. 14702: At 2200 your vessel is at mile 95 proceeding in an easterly direction on the Columbia River. At 0400 the following morning, you pass the 125 mile mark. How many nautical miles have you traveled since 2200?
N a. 22.6 N b. 24.3 Y c. 26.1 N d. 34.5 15039: At 0725 you determined your vessel's position to be 37°15.5'N, 75°33.2'W. Assuming that you make good your course of 206° true and a speed of 18 knots, at what time would you expect to be abeam of Cape Charles Lighted Bell Buoy "14"?
N a. 0750 N b. 0754 Y c. 0758 N d. 0802 15058: At 0740, you obtain the following radar data:
Branford Reef Light bears 248° true @ 3.0 nm
What is your position?
N a. LAT 41°12.0'N, LONG 72°51.3'W N b. LAT 41°12.0'N, LONG 72°51.8'W N c. LAT 41°12.1'N, LONG 72°51.5'W Y d. LAT 41°12.1'N, LONG 72°52.0'W 15106: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?
N a. 147.45 MHz Y b. 162.55 MHz N c. 181.15 MHz N d. 202.35 MHz 15156: Your 1600 position is LAT 37°22.5'N, LONG 75°32.3'W. The depth of water is about __________.
N a. 38 feet (11.5 meters) N b. 45 feet (13.6 meters) Y c. 52 feet (15.8 meters) N d. 59 feet (17.3 meters) 15268: Your vessel is proceeding up New London Harbor Channel, and you are in line with the range. What would be your course per standard magnetic compass?
N a. 352° N b. 354° N c. 002° Y d. 007° 15843: You continue to steer 195°T. You pass Cape Charles Lighted Bell Buoy "14", 0.9 miles abeam to starboard at 2111. Your speed made good from 2045 to 2111 is __________.
N a. 13.7 knots N b. 14.1 knots N c. 14.5 knots Y d. 14.8 knots 15859: You are turning for 9 knots on course 230°T. At 0023,
Horton Point Light bears 208°pgc. At 0053, Horton Point Light bears 126°pgc. What is the position of your 0053 running fix?
N a. LAT 41°05.7'N, LONG 72°27.6'W N b. LAT 41°05.8'N, LONG 72°28.1'W N c. LAT 41°05.9'N, LONG 72°27.4'W Y d. LAT 41°06.0'N, LONG 72°28.2'W 16367: Weather broadcasts for the Norfolk area are broadcast on what frequency?
N a. 162.25 MHz N b. 162.30 MHz Y c. 162.55 MHz N d. 162.65 MHz 16414: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1157 N b. 1208 Y c. 1215 N d. 1219