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.
53: What are the dimensions of Old River Lock, on the Lower Mississippi River?
Y a. 1190 feet x 75 feet N b. 1045 feet x 75 feet N c. 760 feet x 75 feet N d. 425 feet x 75 feet 162: At 1923, you decrease speed to make good 9.2 mph. What is the first Gage you will pass after your speed change?
Y a. Cottonwood Point N b. New Madrid N c. Fulton N d. Tiptonville 199: You are underway in the vicinity of Block Island and obtain the following lines of position:
Montauk Point Light 263°pgc
Block Island Southeast Light 026°pgc
Radar Bearing to Block Island Southwest Point 348°pgc
What is your position at the time of these sightings?
N a. LAT 41°05.0'N, LONG 71°36.2'W Y b. LAT 41°05.3'N, LONG 71°35.8'W N c. LAT 41°05.3'N, LONG 71°35.1'W N d. LAT 41°05.4'N, LONG 71°35.0'W 242: 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?
N a. 92 feet (28.0 meters) Y b. 97 feet (29.4 meters) N c. 108 feet (32.7 meters) N d. 115 feet (35.0 meters) 281: What is the average velocity of the maximum flood current at the Tail of the Horseshoe?
N a. 1.6 knot N b. 1.3 knot Y c. 0.9 knots N d. 0.6 knots 311: A vessel at LAT 20°10'N, LONG 122°00'E is to proceed to LAT 26°18'N, LONG 128°20'E. What are the course and distance by mid-latitude sailing?
N a. 041.2°T, 501.0 miles N b. 041.9°T, 503.6 miles Y c. 043.5°T, 507.3 miles N d. 044.7°T, 509.7 miles 323: At 2205, you are in Thimble Shoal North Auxiliary Channel abeam of lighted gong buoy "4". At this time the visibility decreases to 5 miles. You continue to turn RPMs for 6 knots and experience no set and drift. What time would you expect Old Point Comfort Light (white sector) to become visible?
N a. 2258 N b. 2246 Y c. 2240 N d. 2230 350: 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"?
N a. 090° N b. 086° N c. 083° Y d. 080° 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 450: If you want to put into Point Judith Harbor of Refuge, what chart should you use?
Y a. 13219 N b. 13217 N c. 13209 N d. 13205 597: Which daymark will you see as you approach Natchez Beam Lt. (mile 364.8 AHP)?
N a. Red diamond N b. White square N c. Green square Y d. Red triangle 666: You are on a voyage via position LAT 44°00'N, LONG 150°00'E to LAT 46°15'N, LONG 124°00'W. Using gnomonic chart WOXZC 5270, determine which statement is TRUE?
Y a. A composite sailing with a limiting latitude of 51°N will clear the Aleutian Islands. N b. The northern hemisphere vertex is east of the arrival position. N c. The Aleutian Islands are not a navigational hazard on the direct great circle track. N d. The final course angle lies in the northeast quadrant. 685: What company does NOT have a marine facility along the river bank in Madison Parish (mile 457.0 AHP)?
N a. Complex Chemical Co. N b. Delta Southern Railroads Y c. Baxter Wilson Steam N d. Farm Chemical 1010: On 8 February , your 0800 zone time position is LAT 21°55'S, LONG 52°27'W. Your vessel is on course 056°T at a speed of 17.5 knots. An observation of the Sun's lower limb is made at 0938 zone time, and the observed altitude (Ho) is 46°06.5'. The chronometer reads 12h 37m 23s, and the chronometer error is 1m 24s slow. LAN occurs at 1243 zone time, and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) for this sight is 83°56.1'. Determine the vessel's 1200 zone time position.
N a. LAT 20°57.0'S, LONG 51°21.5'W N b. LAT 20°58.0'S, LONG 51°25.5'W N c. LAT 21°04.0'S, LONG 51°12.0'W Y d. LAT 21°04.0'S, LONG 51°21.5'W 1406: Which of the following describes the river at Cypress Bend, mile 569.0 AHP?
N a. There are revetments on both banks. Y b. The river is three tenths of a mile wide. N c. There is dredge spoil on both banks. N d. There is a turning basin located on the LDB. 1464: On 17 May , your 1554 zone time DR position is LAT 26°33.0'N, LONG 65°46.0'W. At that time, you observe the Sun bearing 269°psc. The chronometer reads 07h 55m 47s, and the chronometer error is 01m 14s fast. The variation is 3°W. What is the deviation of the standard magnetic compass?
N a. 0.6°E N b. 1.6°W N c. 4.6°W Y d. 7.6°E 1492: On 22 February , your 2045 ZT position is LAT 33°19'N,
LONG 52°06'W. You observe Polaris bearing 358.1°pgc. At the time of the observation the helmsman noted that he was heading 048°pgc and 065°psc. The variation is 19°W. What is the deviation for that heading?
N a. 1°E Y b. 3°E N c. 1°W N d. 3°W 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 1670: On 10 August , your vessel's 0426 zone time DR position is LAT 52°07'N, LONG 142°16'E, when an amplitude of the Sun is observed. The Sun's lower limb is about 20 minutes of arc above the visible horizon and bears 074.5° per standard compass. Variation in the area is 12°W. The chronometer reads 07h 24m 19s and is 02m 34s fast. Which of the following is the deviation of the standard compass?
N a. 0.0° N b. 1.3°W Y c. 1.3°E N d. 2.3°W 1676: On 10 June , your vessel's 0519 zone time DR position is LAT 27°07.0'N, LONG 92°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 063.6° per standard magnetic compass. The variation in the area is 4.8°E. The chronometer reads 11h 17m 32s and is 01m 18s slow. What is the deviation of the compass?
N a. 5.6°E N b. 4.8°E N c. 4.2°W Y d. 4.8°W 1742: The highest point on your towboat is 32 feet above the
water, and the Helena Gage reads +6.6 feet. What is the vertical clearance when you pass under the A-span of the Helena Highway Bridge?
Y a. 80.8 feet N b. 73.1 feet N c. 68.0 feet N d. 56.1 feet 1769: In order to determine what buoys, if any, are in place at Concordia Bar crossing (mile 596.0 AHP), what should you check?
N a. Bulletin board at the Rosedale Gage N b. Waterways Journal N c. Light List Y d. Notice to Mariners 1856: On 22 June , your 0424 ZT DR position is LAT 26°18.5'N,
LONG 124°18.2'W. You observe an unidentified star bearing 031°T at an observed altitude (Ho) of 49°26.0'. The chronometer reads 00h 23m 24s and is 01m 32s slow. What star did you observe?
N a. Peacock Y b. Schedar N c. Ankaa N d. Alioth 1872: 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 031°T at a sextant altitude (hs) of 70°10.3'. 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?
N a. Sheratan N b. Ruchbah N c. Mimosa Y d. Cor Caroli 2090: At your current speed of 17 knots you only have enough fuel remaining to travel 316 miles. You must travel 622 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
Y a. 12.1 N b. 13.3 N c. 14.5 N d. 15.7 2181: On 4 June , at 0630 ZT, morning stars were observed, and the vessel's position was determined to be LAT 26°15'S, LONG 121°20'W. Your vessel is steaming at 13.0 knots on a course of 246°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 05h 14m 27s, and the sextant altitude is 25°57.8'. The index error is 2.1' off the arc, and the chronometer error is 0m 53s slow. Your height of eye is 39.0 feet. What is the intercept (a) and azimuth (Zn) of this sight using the assumed position method?
N a. Zn 044.6°, a 1.7' A Y b. Zn 044.6°, a 2.5' T N c. Zn 135.1°, a 1.7' A N d. Zn 135.1°, a 2.5' T 2676: While on a course of 019°pgc, a light bears 14° on the port bow at a distance of 15.3 miles. What course should you steer to pass 1.5 miles abeam of the light, leaving it to port?
N a. 006°pgc Y b. 011°pgc N c. 013°pgc N d. 015°pgc 3452: 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 course should you steer?
N a. 027°T N b. 037°T Y c. 044°T N d. 054°T 3603: You are steering 318°psc. A northeasterly wind causes 3° of leeway. The variation is 14°E and the deviation table is extracted below. What will be the true course made good?
DEVIATION TABLE
MAG HDG DEV
300° 2°E
315° 0°
330° 2°W
N a. 301°T N b. 303°T N c. 327°T Y d. 329°T 10208: Your GPS position is LAT 41°08.5'N, LONG 72°28.8'W. What course must you steer per standard magnetic compass (psc) to leave Cornfield Lighted Whistle Buoy "CF" 0.5 mile abeam to starboard?
N a. 032°psc N b. 048°psc N c. 055°psc Y d. 067°psc 10611: You are off the coast of Mexico and are taking a time tick for 1800. At approximately 1754, you hear the preparatory signal "VVVV de XDD" from the time signal station. Then you hear a series of 1 second dashes followed by a 9 second silent period and then a long 1.3 second dash. At the beginning of the long dash, your comparing watch reads 06h 00m 07s. When compared to the chronometer, the comparing watch reads 06h 01m 24s, and the chronometer reads 05h 59m 23s. What is the chronometer error?
N a. 0m 07s fast N b. 1m 17s fast N c. 0m 37s slow Y d. 1m 54s slow 12909: At 0914 you are in Chesapeake Bay southeast inbound lane with buoy "CBJ" close aboard to port. What is your ETA at Thimble Shoal Channel Buoy "19" if you are making 10.9 knots?
N a. 1034 Y b. 1038 N c. 1046 N d. 1042 13108: At 1103 you are in the entrance to Great Salt Pond on Block Island with buoy "5" close aboard. What is your ETA at light "1" at the mouth of the approaches to Lake Montauk if you make good 8.2 knots?
N a. 1249 N b. 1254 N c. 1259 Y d. 1310 13404: Your vessel has become disabled and is dead in the water. Your GPS position is LAT 41°12.1'N, LONG 72°43.5'W. You decide to anchor at this position. Under normal conditions, how much anchor chain should you expect to put out?
N a. 80 to 190 feet N b. 190 to 240 feet Y c. 245 to 343 feet N d. 345 to 420 feet 15012: At 2020, you obtain a fix using the following information:
9960-X-27112
9960-Y-41432
Cape Charles Lighted Bell Buoy "14" bears 333°pgc. Your longitude is __________.
N a. 75°38.9'W N b. 75°39.1'W N c. 75°39.3'W Y d. 75°40.5'W 15042: From your 0741 position, you wish to change course in order to pass 2.2 miles easterly of Cape Charles Lighted Bell Buoy "14". Your engine speed is now 14.0 knots. You estimate the current to be 240° true at 1.8 knots. What is the true course to steer to make good the desired course?
N a. 179°true N b. 185°true Y c. 190° true N d. 197°true 15160: At 1815, your position is LAT 37°01.0'N, LONG 75°42.7'W. If there is no current, what is the course per standard magnetic compass to arrive at a point 0.3 mile due north of North Chesapeake Entrance Lighted Whistle Buoy "NCA"?
N a. 249.0°psc N b. 251.5°psc N c. 255.0°psc Y d. 257.0°psc 15257: At 0725, Stratford Point Light bears 327°pgc at 3.1 miles.
At this time, you wish to change course to 048°T. The current is 135°T at 1.8 knots. Your engine speed is 8 knots. What course must you steer to make good 048°T?
Y a. 035°T N b. 038°T N c. 041°T N d. 044°T 15344: From your 1850 position of 41°12.8'N, 71°44.1'W, you change course to 060°T. If you make the course good,
what will be your predicted distance off Point Judith Light when the Light bears 015°T?
N a. 1.2 miles N b. 1.9 miles Y c. 2.7 miles N d. 3.4 miles 15511: From your 1830 fix, you come left to a course of 290°T.
Which of the following statements concerning Watch Hill Light is FALSE?
N a. The nominal range of its white light is 15 miles. N b. It displays both red and white lights. N c. Its horn blasts every 30 seconds in fog. Y d. Its geographic range is 18.5 miles at a 35 foot (10.7 meter) height of eye. 15727: The Helena Gage reads 9.4 feet. The high point on your towboat is 46 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 56.0 feet Y b. 64.2 feet N c. 79.5 feet N d. 106.1 feet 15819: You must arrive at your final destination by 0800. The distance from your 0300 position to the final destination is 40.5 miles. What minimum speed must be made good to arrive on time?
Y a. 8.1 knots N b. 8.5 knots N c. 9.3 knots N d. 9.6 knots 15846: At 2200, you alter course to 204°T, at 14 knots. You expect a current on this leg of the trip, setting 325° at 1.5 knots. Which course should you steer per gyro compass to make good the true course?
N a. 184°pgc N b. 190°pgc N c. 194°pgc Y d. 201°pgc 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 16007: If the visibility is 11 miles, what is the earliest time you can expect to see New Haven Light?
N a. The light is visible at 0352. N b. 0414 Y c. 0443 N d. You will not sight the light. 16219: At 0900, you take the following radar ranges:
Watch Hill Point 5.4 miles
Block Island Grace Point 8.3 miles
Which statement is TRUE?
N a. You are within 3 nautical miles of the coast. N b. The bottom in the area is sand and gravel. Y c. The fix is indeterminate. N d. You are governed by the Inland Rules. 16239: From your 2045 position, you set a course to pass 1.5 miles due east of the charted position of Hog Island Lighted Bell Buoy "12". The known set and drift in the area are 068°T at 3 knots. What is the course to steer, with no change in engine speed, to make good your desired course?
Y a. 200°T N b. 203°T N c. 206°T N d. 209°T 16256: What is the course per gyro compass from the anchorage to point A located 0.5 mile east of Cape Charles Lighted Bell Buoy 14?
N a. 180° Y b. 184° N c. 198° N d. 199.5° 16415: You can follow what loran reading between your two positions?
N a. There is no loran reading to follow. N b. 9960-Y-43958 N c. 9960-W-14655 Y d. 9960-X-25982 16507: What is your speed from your 0630 position, with Buoy "PI"
close abeam, to your 0654 position?
N a. 8.2 knots N b. 9.3 knots Y c. 10.5 knots N d. 11.4 knots 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