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.
65: What are the dimensions of the Old River Lock on the Lower Old River (mile 304 AHP)?
N a. 1202 x 84 feet N b. 1200 x 75 feet N c. 1195 x 75 feet Y d. 1190 x 75 feet 155: As you approach Old River Control Structure Light you see a flashing amber light. You should __________.
Y a. navigate as close to the left descending bank as safety permits N b. navigate as close to the right descending bank as safety permits N c. turn into the inflow channel as the bypass is now open N d. slow your engine speed to not more than 5 mph 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) 198: While navigating inbound Thimble Shoal Channel system you must __________.
N a. navigate in the main channel when between Trestles A & B Y b. use the north auxiliary channel N c. remain 1500 yards (1360 meters) from large naval vessels N d. maintain a speed of six knots 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 257: At 0705, you change course to head for The Race. You wish to leave Race Rock Light bearing due north at 0.4 mile. If the current is 110°T, at 2.8 knots, and you are turning for 12.0 knots, what course (pgc) should you steer?
N a. 252°pgc N b. 257°pgc N c. 265°pgc Y d. 271°pgc 288: According to your track line, how far off New Point Comfort Spit Light "4" will you be when abeam of this light?
N a. 0.5 mile Y b. 0.9 miles N c. 1.5 miles N d. 1.8 miles 288: According to your track line, how far off New Point Comfort Spit Light "4" will you be when abeam of this light?
N a. 0.5 mile Y b. 0.9 miles N c. 1.5 miles N d. 1.8 miles 321: At 2200, you are in position LAT 36°57.5'N, LONG 76°02.5'W. You intend to travel up the Thimble Shoals auxiliary Channel to Hampton Roads. According to the Coast Pilot, what is the depth of the auxiliary channel on either side of the main channel?
N a. 45 feet (13.7 meters) N b. 36 feet (11.0 meters) Y c. 32 feet (9.8 meters) N d. 28 feet (8.5 meters) 400: Your vessel receives a distress call from a vessel reporting her position at LAT 5°24'N, LONG 31°16'W. Your position is LAT 2°39'S, LONG 39°24'W. Determine the distance from your vessel to the vessel in distress by Mercator sailing.
N a. 669.3 miles Y b. 688.7 miles N c. 699.2 miles N d. 712.9 miles 511: At 0130, your position is LAT 41°09.3'N, LONG 72°46.9'W when you change course to 086°T. If you make good 086°T, what is the closest point of approach to Twenty-Eight Foot Shoal Lighted Buoy?
N a. 1.2 mile N b. 1.1 mile Y c. 0.9 miles N d. 0.7 miles 573: Visibility has decreased to 1 mile in haze. At 0948, you take the following radar ranges. What course should you steer from this fix to the York Spit channel between buoys "19" and "20"?
Thimble Shoal Light - 5.9 miles South end of trestle C of the Chesapeake Bay Bridge and Tunnel - 3.8 miles South end of trestle B of the Chesapeake Bay Bridge and Tunnel - 5.4 miles
Y a. 010°pgc N b. 008°pgc N c. 004°pgc N d. 001°pgc 603: At 0915 zone time, on 7 November , you depart Seattle, LAT 47°36.0'N, LONG 122°22.0'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 18.5 knots. The distance is 4,527 miles. What is your estimated zone time of arrival at Kobe?
N a. 1257, 17 November Y b. 0657, 18 November N c. 1857, 18 November N d. 0657, 19 November 658: You are planning a voyage by great circle from LAT 59°00'N, LONG 07°00'W via LAT 38°00'N, LONG 61°30'W. Which of the following statements is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. You are to the east of the Northern Hemisphere vertex. N b. When plotted on a Mercator chart the track line will be concave to Cape Farwell (Kap Farvel). Y c. All courses are in the southwest quadrant of the compass. N d. Distance is measured by using the length of a degree of latitude at the midpoint of the track line. 752: On 5 May , at 1953 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 29°30.0'N, LONG 66°25.7'W, and your sextant reads 29°07.2'. Your chronometer reads 11h 51m 45s, and your chronometer error is 01m 36s slow. Your height of eye is 56 feet, and the index error for your sextant is 1.5' on the arc. What is the latitude of your vessel from your observation of Polaris?
N a. 29°14.3'N Y b. 29°23.6'N N c. 29°32.3'N N d. 29°38.8'N 836: On 16 June , in DR position LAT 50°57.0'S, LONG 53°03.9'W (ZD+4), you take an ex-meridian observation of Acrux at lower transit. The chronometer time of the sight is 10h 08m 18s, and the chronometer error is 02m 12s fast. The sextant altitude (hs) is 23°49.0'. The index error is 1.1' off the arc, and your height of eye is 26 feet. What is the latitude at meridian transit?
Y a. 50°41.2'S N b. 51°02.2'S N c. 51°33.0'S N d. 51°41.2'S 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 1230: At 1814, on 11 September, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day?
Y a. 8.7 mph N b. 7.7 mph N c. 6.3 mph N d. 5.6 mph 1247: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 5.6 mph Y b. 4.4 mph N c. 2.1 mph N d. 1.8 mph 1700: As you approach French Point Light (mile 915.4 AHP), you see 2 daymarks on the structure. What significance do the daymarks have?
N a. They indicate the starboard side of the channel from seaward and mid-channel fairway. Y b. They indicate the starboard side of the channel from seaward and a channel crossing. N c. They indicate the port side of the channel from seaward and a range marking. N d. They indicate the port side of the channel and a channel crossing. 1710: What is the width of the navigable channel at Columbus Pt. Light (mile 936.0 AHP)?
N a. 200 ft. Y b. 300 ft. N c. 450 ft. N d. 750 ft. 2002: On 16 July , your 1810 zone time DR position is LAT 24°16.5'S, LONG 162°52.0'E. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Arcturus, Spica, Antares Y b. Jupiter, Alphard, Alphecca N c. Pollux, Mars, Deneb N d. Vega, Hadar, Venus 2092: At your current speed of 23 knots you only have enough fuel remaining to travel 386 miles. You must travel 785 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 19.3 N b. 17.7 Y c. 16.1 N d. 14.5 2151: On 16 June , 0612 zone time, morning stars were observed. The vessel's position was LAT 27°23.0'S, LONG 56°22.0'W. The vessel is steaming at 16.0 knots on a course of 212°T. A sextant observation of the Sun's lower limb is made at 0850 zone time. The chronometer reads 00h 53m 19s, and the sextant altitude is 22°58.6'. The index error is 2.0' off the arc, and the chronometer error is 02m 43s fast. Your height of eye is 61.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
Y a. 044.3° N b. 052.6° N c. 136.1° N d. 148.4° 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 2335: You are underway and intend to make good a course of 088°T. You experience a current with a set and drift of 300°T at 2.4 knots, and a southerly wind produces a leeway of 3°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 16 knots. What will be your speed made good over your intended course of 088°T?
N a. 13.4 knots Y b. 13.9 knots N c. 14.4 knots N d. 14.9 knots 2595: At 0145 you take on the pilot and are inbound Port Jefferson. The ship's heading is 147°pgc when lined up on the Port Jefferson range. What is your gyro error?
Y a. 1° W N b. 1° E N c. 2° E N d. 0° 2878: Your vessel is steering 143°T at 16 knots. At 2147 a light bears 106°T, and at 2206 the same light bears 078°T. What will be your distance off abeam?
N a. 5.1 miles N b. 5.4 miles Y c. 5.9 miles N d. 6.5 miles 2902: You are steaming on a course of 058°T at 11.5 knots. At 0209 you observe a lighthouse bearing 129°T. At 0252 the lighthouse bears 173°T. What is your distance off at the second bearing?
N a. 9.4 miles N b. 10.7 miles Y c. 11.2 miles N d. 12.8 miles 2909: You are running coastwise at 14 knots. You sight a lighthouse abeam at 0912. At 0939 the lighthouse is 4 points abaft the beam. What is your distance off at the second bearing?
N a. 5.5 miles N b. 6.3 miles N c. 7.8 miles Y d. 8.9 miles 3051: The propeller on a vessel has a diameter of 20.6 feet and a pitch of 23.4 feet. What would be the apparent slip if the vessel cruised 538 miles in a 24 hour day (observed distance) at an average RPM of 87?
Y a. -11.6% N b. +11.6% N c. -10.3% N d. +10.3% 3052: The propeller on a vessel has a diameter of 21.2 feet and a pitch of 20.0 feet. What would be the apparent slip if the vessel cruised 391 miles in a 24 hour day (observed distance) at an average RPM of 88?
N a. -11.5% N b. +11.5% N c. -6.2% Y d. +6.2% 3088: If the pitch of the propeller is 21.5 feet, and the revolutions per day are 96,666, calculate the day's run allowing 9% negative slip.
N a. 311.1 miles N b. 341.8 miles N c. 357.9 miles Y d. 372.6 miles 3097: If the pitch of the propeller is 19.4 feet, and the revolutions per day are 96,713, calculate the day's run allowing 6% positive slip.
N a. 266.4 miles Y b. 290.1 miles N c. 308.6 miles N d. 327.1 miles 10506: 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 1031 your position is LAT 36°59.5'N, LONG 75°44.9'W. What was the set and drift?
N a. 239° at 0.8 knot Y b. 252° at 1.3 knots N c. 060° at 0.7 knot N d. 073° at 1.2 knots 11105: What is the height of the tide at Great Salt Pond on Block Island at the afternoon high water (daylight savings time) on 1 July 1983?
N a. 3.9 feet N b. 3.0 feet N c. 2.4 feet Y d. 2.1 feet 11806: What course should you steer by standard magnetic compass between Mattituck Inlet and Branford Reef Light, if the set and drift of the current are 027° at 2.5 knots, and a northeasterly wind will cause 1° of leeway? Your engines are turning for 12 knots.
N a. 295°psc N b. 305°psc N c. 317°psc Y d. 320°psc 11901: You are turning for 7.5 knots and a westerly wind is causing 2° of leeway. There is a current of 047°T at 1.2 knots. What course should you steer between the entrance to Quonochontaug Pond (LAT 41°19.8'N, LONG 71°43.2'W) and the entrance to Great Salt Pond (LAT 41°12.0'N,
LONG 71°35.6'W)?
N a. 156°T Y b. 155°T N c. 144°T N d. 140°T 12609: You are on course 239° per standard magnetic compass when you take the following bearings: Falkner Island Light 314°psc Duck Island West Breakwater Light 2DI 039°psc Horton Point Light 157°psc What is your position?
Y a. LAT 41°09.9'N, LONG 72°32.0'W N b. LAT 41°09.3'N, LONG 72°33.0'W N c. LAT 41°10.5'N, LONG 72°32.1'W N d. LAT 41°11.6'N, LONG 72°33.6'W 12708: You are on course 302° per standard magnetic compass when you take the following bearings: Little Gull Island Light 283°psc Race Rock Light 311°psc Latimer Reef Light 027°psc What is your position?
N a. LAT 41°12.2'N, LONG 71°57.6'W N b. LAT 41°12.4'N, LONG 71°57.4'W N c. LAT 41°12.4'N, LONG 71°57.9'W Y d. LAT 41°12.6'N, LONG 71°57.6'W 13808: The chart symbol depicted at LAT 41°13.5'N, LONG 72°29.7'W indicates __________.
N a. the exact position of a dangerous wreck Y b. the approximate position of a wreck dangerous to surface navigation N c. a wreck cleared by wire drag to a depth of 39 feet N d. a wreck not dangerous to surface navigation 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 15011: Assume set and drift have no effect on your vessel. If you change course to 187°pgc from your 1950 position, how close will you pass Cape Charles Lighted Bell Buoy "14"?
N a. 0.1 mile N b. 0.5 mile Y c. 1.1 mile N d. 1.7 miles 15456: On 25 February, your vessel is berthed near Lamberts Point in Norfolk. You are preparing to sail for Baltimore and wish to be transiting York Spit Channel while the morning flood current is at its maximum speed. At what time should you be between buoys "33" and "34"? And, what will be the speed of the flood at this time?
N a. 0513, 0.8 k Y b. 0810, 1.2 k N c. 0810, 1.5 k N d. 1124, 1.2 k 15659: At 0705, you change course to 096°T. At this time, Race Rock Light is bearing 000°T at 0.35 mile. You are now governed by which Navigation Rules?
Y a. COLREGS N b. Local Pilot Rules N c. Inland Rules N d. Coastal Fishery Rules 15721: You are turning for 7.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?
Y a. 8.8 mph N b. 7.9 mph N c. 7.8 mph N d. 6.8 mph 15845: If you are going to head directly for Chesapeake Light from your 2111 fix, what is the course to make good?
Y a. 190°T N b. 193°T N c. 196°T N d. 199°T 15909: From your 0740 position, you change course to pass 1.1 miles north of Falkner Island Light. What loran reading will ensure that you will remain clear of the 18' shoal located 1 mile NW of Falkner Island Light?
N a. 9960 W: not less than 14942 N b. 9960 X: not more than 26452 Y c. 9960 Y: not less than 44013 N d. None of the above 16417: You are encountering heavy weather. What action should you take based on your 1430 fix?
Y a. Alter course to the right, to pass well clear of Southwest Ledge. N b. Continue on the same course at the same speed. N c. Slow to 8.3 knots to compensate for the current. N d. Continue on the same course but increase speed. 16842: From your 0939 position, you wish to change course in order to pass 0.3 mile north of Buoy "NCA" (LL#375) in the inbound traffic lane. You estimate the current to be 150°
T at 2.0 knots. What course should you steer to make good the desired course? Your speed is still 13.0 knots.
N a. 232°T N b. 235°T Y c. 245°T N d. 249°T