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.
297: What course should you steer per standard magnetic compass in order to navigate down the center of York River Entrance Channel (ignore set and drift)?
N a. 149°psc N b. 145°psc Y c. 141°psc N d. 139°psc 384: What is the course per standard magnetic compass between points "A" and "B"?
N a. 099.5° Y b. 098.5° N c. 095.5° N d. 094.5° 469: Determine the great circle initial course from LAT 37°12.6'S, LONG 73°58.0'W to LAT 10°33.0'S, LONG 142°08.0'E.
Y a. 223°T N b. 253°T N c. 287°T N d. 317°T 526: Your vessel receives a distress call from a vessel reporting her position as LAT 35°01.0'S, LONG 18°51.0'W. Your position is LAT 35°01.0'S, LONG 21°42.0'W. Determine the true course and distance from your vessel to the vessel in distress by parallel sailing.
Y a. 090°T, 140.0 miles N b. 090°T, 189.2 miles N c. 270°T, 140.0 miles N d. 270°T, 189.2 miles 656: You are planning a voyage by great circle to Reykjavik, Iceland, via Cape Race, Newfoundland, LAT 46°30'N, LONG 53°00'W. Which statement is TRUE? (Use gnomonic tracking chart WOXZC 5274)
N a. The track line will be concave to Cape Farewell (Kap Farvel) when plotted on a Mercator chart. Y b. You will reach the northernmost latitude in the vicinity of Reykjavik. N c. The distance is measured using the length of a degree of latitude at the mid-latitude and mid-longitude position. N d. The Northern Hemisphere vertex is in the vicinity of 49°W longitude. 753: On 10 June , your 2010 zone time DR position is LAT 41°10.0'N, LONG 61°15.0'W. At that time, you observe Polaris with a sextant altitude (hs) of 40°35.8'. The chronometer time of the sight is 00h 08m 18s, and the chronometer error is 01m 54s slow. The index error is 2.0' on the arc, and the height of eye is 40 feet. What is your latitude by Polaris?
N a. 41°10.6'N Y b. 41°15.0'N N c. 41°18.3'N N d. 41°21.2'N 753: On 10 June , your 2010 zone time DR position is LAT 41°10.0'N, LONG 61°15.0'W. At that time, you observe Polaris with a sextant altitude (hs) of 40°35.8'. The chronometer time of the sight is 00h 08m 18s, and the chronometer error is 01m 54s slow. The index error is 2.0' on the arc, and the height of eye is 40 feet. What is your latitude by Polaris?
N a. 41°10.6'N Y b. 41°15.0'N N c. 41°18.3'N N d. 41°21.2'N 1021: On 30 March , your 0145 DR position is LAT 29°30'S, LONG 122°45'E. You are on course 055°T at a speed of 22 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 28°24.6'S, LONG 124°21.4'E Y b. LAT 28°39.9'S, LONG 124°18.6'E N c. LAT 28°41.5'S, LONG 124°41.5'E N d. LAT 29°20.1'S, LONG 123°41.0'E 1082: On 20 Nov. , your 1030 ZT DR position is LAT 27°16.0'N, LONG 157°18.6'E. You are on course 060°T at a speed of 20 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1200 running fix. NP-0012
N a. LAT 27°16.8'N, LONG 157°30.5'E N b. LAT 27°22.6'N, LONG 157°37.8'E Y c. LAT 27°29.7'N, LONG 157°43.0'E N d. LAT 27°33.4'N, LONG 157°48.2'E 1131: At 1923, you increase speed to make good 9.2 mph. What is the first Gage you will pass after your speed change?
N a. Cottonwood Point Y b. Caruthersville N c. Fulton N d. New Madrid 1179: On 26 September , your 0830 zone time DR position is LAT 26°04.0'N, LONG 129°16.0'W. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
Y a. 1124 N b. 1127 N c. 1130 N d. 1133 1249: What is the white/black within a circle symbol found at mile 592.1 AHP?
N a. Terrence Landing Light N b. Daymark Y c. River Gage N d. Information Board 1272: At 1800 zone time, on 7 December , your DR position is LAT 22°48'S, LONG 91°26'W. You are steering 320°T at a speed of 14.0 knots. What is the zone time of sunset?
N a. 1830 N b. 1836 Y c. 1842 N d. 1852 1709: A stretch where the channel changes from one side of the river to the other is called a __________.
N a. bifurcation N b. transit Y c. crossing N d. changeover 1726: The highest point on your towboat is 57 feet above water. The Natchez Gage (mile 363.3 AHP) reads 16.7 feet. What is the vertical clearance when you pass under the Natchez - Vidalia (westbound) Hwy. Bridge?
Y a. 52.3 feet N b. 59.9 feet N c. 61.0 feet N d. 68.6 feet 1897: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 249°T at an observed altitude (Ho) of 52°50.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?
N a. Peacock N b. Schedar N c. Ankaa Y d. Altair 2024: On 3 December , evening twilight for your vessel will occur at 1901 zone time. Your vessel's DR position for this time will be LAT 24°18.5'S, LONG 110°30.6'W. Considering their magnitude and location, what are the three stars best suited to observe for a fix at star time?
N a. Canopus, Hamal, Deneb Y b. Alpheratz, Achernar, Nunki N c. Antares, Fomalhaut, Mirfak N d. Rigel, Canopus, Regulus 2110: 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. 38.5 feet (11.7 meters) N b. 43.5 feet (13.2 meters) N c. 51.0 feet (15.5 meters) Y d. 59.5 feet (18.0 meters) 2158: On 26 May , your vessel's 1906 zone time position is LAT 27°16.0'N, LONG 24°37.0'W. At that time, a sextant observation of the planet Jupiter was made. The sextant altitude is 63°27.6', and the chronometer reads 09h 05m 16s. The index error is 5.2' on the arc, and the chronometer error is 01m 25s slow. Your height of eye is determined to be 52.6 feet. What is the (Zn) of this sight using the assumed position?
N a. 011.3°T Y b. 168.7°T N c. 191.3°T N d. 348.7°T 2654: You are steering 231°T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338. You change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?
Y a. 0420 N b. 0423 N c. 0426 N d. 0429 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 3250: You are taking a time tick using the 1200 signal from Valparaiso, Chile. You hear a series of 1 second dashes followed by a 9 second silent period, then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 12h 00m 18s. When compared to the chronometer, the comparing watch reads 12h 01m 23s, and the chronometer reads 11h 59m 35s. What is the chronometer error?
N a. 0m 18s fast N b. 1m 05s fast N c. 0m 25s slow Y d. 1m 30s slow 3259: You have steamed 607 miles at 17.0 knots, and consumed 121 tons of fuel. If you have 479 tons of usable fuel remaining, how far can you steam at 14.5 knots?
N a. 1211 miles N b. 1748 miles N c. 2817 miles Y d. 3303 miles 3275: You have steamed 989 miles at 16.5 knots, and consumed 215 tons of fuel. If you have 345 tons of usable fuel remaining, how far can you steam at 13 knots?
N a. 1025 miles N b. 1993 miles Y c. 2557 miles N d. 3245 miles 3304: You have steamed 265 miles and consumed 25.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 346 miles?
Y a. 32.6 tons N b. 37.4 tons N c. 42.6 tons N d. 49.5 tons 3457: You wish to make good a course of 035°T while turning for an engine speed of 12 knots. The set is 340°T, and the drift is 2 knots. What speed will you make good along the track line?
N a. 12.2 knots N b. 12.7 knots Y c. 13.0 knots N d. 13.3 knots 3761: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 283°
T, and the variation is 13°E. If the heading of your vessel at the time of the sighting is 278° per standard compass, what is the deviation?
N a. 5°E N b. 5°W N c. 8°E Y d. 8°W 4012: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a magnetic compass heading of 210°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324°
Y a. 0.0° N b. 0.5°W N c. 0.5°E N d. 1.0°E 10302: Determine the course per standard magnetic compass from Cerberus Shoal Buoy 9 (LAT 41°10.4'N, LONG 71°57.1'W) to a position 0.2 mile south of Race Rock Light (LAT 41°14.6'N, LONG 72°02.8'W).
Y a. 326.5°psc N b. 324.0°psc N c. 298.5°psc N d. 296.0°psc 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 12103: You sight Wolf Trap Light in line with New Point Comfort Spit Light "2" bearing 048° per standard magnetic compass. You are on course 203°psc. Based on this, you know __________.
N a. the compass error is 12°W N b. the deviation is 9°W Y c. that the deviation table is in error N d. the deviation is 3°E for bearings of 048° per standard magnetic compass 12604: You are on course 082° per standard magnetic compass (psc) when you take the following bearings: New London Ledge Light - 036.5°psc Little Gull Island Light - 157.0°psc Saybrook Break Water Light - 294.5°psc What is your position?
N a. LAT 41°02.3'N, LONG 72°04.5'W N b. LAT 41°09.5'N, LONG 72°07.1'W Y c. LAT 41°13.6'N, LONG 72°07.5'W N d. LAT 41°14.1'N, LONG 72°12.8'W 14002: At 1630 your vessel exits Bonneville Lock steaming in a westerly direction. What speed must you average to arrive at the Interstate 5 highway bridge with an ETA of 2120?
N a. 6 mph N b. 7 mph Y c. 8 mph N d. 9 mph 14502: You are proceeding in an easterly direction on the Columbia River. The pool level of the Bonneville reservoir stands at 84 feet above MSL. If the highest point on your vessel is 49 feet above the water, what will be the vertical clearance as you pass under the center of the Bridge of the Gods?
Y a. 74.0 feet N b. 86.0 feet N c. 97.5 feet N d. 123 feet 14602: Where would you tune your radio to receive a VHF-FM weather broadcast for the Columbia River in the vicinity of Government Island?
N a. KIH-32 - 162.40 MHz N b. KBA-99 - 162.40 MHz Y c. KEB-97 - 162.55 MHz N d. KEC-62 - 162.55 MHz 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 15306: Your 0200 position is LAT 37°23.5'N, LONG 76°09.2'W. Your speed is 8 knots, and your course is 095°T. Which statement is TRUE?
N a. The depth of the water in your vicinity is about 38 to 40 fathoms (69.1 meters to 72.7 meters). Y b. You are less than a mile from a sunken wreck which could interfere with your tow. N c. The closest major aid to navigation is New Point Comfort Light. N d. You will pass through a disposal area on your present course. 15360: Your 0507 position is about 7 miles from Bridgeport, CT. What is the distance from this position to Newport, RI?
Y a. 88 miles N b. 95 miles N c. 101 miles N d. 114 miles 15443: As you enter Chesapeake Bay, visibility improves. At 2235 you are between Chesapeake Channel Buoys "5" and "6" in the 41 foot dredged section of Chesapeake Channel. At that time, you change course to pass between buoys "9" and "10". If buoys "11" and "12" are extinguished, your best leading light to keep you in deep water in the Chesapeake Channel, as you approach the Chesapeake Bay Bridge and Tunnel, would be __________.
N a. fixed red light on trestle "C" Y b. fixed green light on trestle "B" N c. fixed red light on trestle "B" N d. Thimble Shoal Light 15642: At 2030 you take the following radar ranges:
Race Rock Light 2.1 miles
Latimer Reef Light 6.4 miles
If you estimate an average current of 080°T at 1.5 knots,
which course will you steer per gyrocompass to leave Endeavor Shoals Gong Buoy bearing 270°T at 1.5 miles?
N a. 115° N b. 118° N c. 124° Y d. 127° 15716: At 1210, you are in position LAT 41°14.3'N, LONG 72°16.5'W. What is the depth of water below your keel?
Y a. 97 feet (29.4 meters) N b. 108 feet (32.7 meters) N c. 119 feet (36.1 meters) N d. 125 feet (37.9 meters) 15861: At 0125, Mattituck Inlet Light bears 203°pgc at 2.1 miles.
What is the approximate depth of the water under the keel?
N a. 46 fathoms (83.6 meters) N b. 44 fathoms (80.0 meters) N c. 43 feet (13.0 meters) Y d. 38 feet (11.5 meters) 15865: From your 0200 position, you change course to 272°pgc. How far north of Stratford Shoal Middle Ground Light does this track pass?
Y a. 2.1 miles N b. 1.6 miles N c. 1.3 miles N d. 1.0 miles 16115: You sighted Trestle "A" in line at 0707 and are steering 108°T. At 0731, Cape Henry Light bears 136°T; Cape Charles Light bears 032.5°T; and Thimble Shoal Tunnel South Light bears 282°T. What was the speed made good between 0707 and 0731?
N a. 8.3 knots Y b. 8.8 knots N c. 9.2 knots N d. 9.4 knots 16270: The wind is northerly and will cause 2° leeway. The current is 018° at 0.5 knot. If your engines are turning for 8.0 knots. What should you steer to remain in York River Entrance Channel?
N a. 304°T N b. 306°T Y c. 309°T N d. 314°T 16516: At 0815, visibility is excellent and you can see Montauk
Point. Montauk Point is __________.
N a. low and rocky with scattered small pine trees N b. a low lying wetland N c. a flat wooded plain Y d. a high sandy bluff 16612: At 0112, what is the approximate depth under the keel?
Y a. 38 feet (11.5 meters) N b. 47 feet (14.2 meters) N c. 51 feet (15.5 meters) N d. 57 feet (17.3 meters) 16613: At 0112, you are on course 124°T and turning for 12.0 knots. What course will you make good if the current is 255°T at 1.2 knots?
N a. 132° Y b. 129° N c. 120° N d. 118° 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