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 124: At 1000, on May 11th, you are passing George Prince Lt. (mile 364.1 AHP) in Natchez, Mississippi and must send an ETA to the Monsanto Terminal in St. Louis (mile 178.0 UMR). Your engines are still turning for 8.5 mph and you estimate the current at 2.5 mph. What will be your arrival time in St. Louis?
N a. 1919 on 15 May N b. 2344 on 15 May Y c. 1757 on 16 May N d. 2236 on 16 May 293: At 1730, your position is LAT 37°13.9'N, LONG 76°26.4'W. You are steering course 088° per standard magnetic compass (psc) at an engine speed of 8.0 knots. What is your distance off Tue Marshes Light at 1730?
N a. 3.2 miles N b. 3.0 miles N c. 2.8 miles Y d. 2.6 miles 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 328: From your 0315 position, what time can you expect to reach York Spit Channel Buoys "37" and "38"?
N a. 0423 N b. 0417 N c. 0412 Y d. 0405 465: Determine the great circle distance and initial course from LAT 34°51.0'N, LONG 115°01.2'E to LAT 10°16.0'S, LONG 51°42.6'E.
N a. 4436 miles, 245.3°T N b. 4598 miles, 245.6°T Y c. 4493 miles, 245.6°T N d. 4582 miles, 245.6°T 732: On 3 January , your 1759 zone time DR position is LONG 60°53.2'W. At that time you observe Polaris with a sextant altitude (hs) of 22°55.8'. The chronometer time of the sight is 09h 57m 10s, and the chronometer error is 02m 26s slow. The index error is 2.9' off the arc, and the height of eye is 52.5 feet. What is your latitude by Polaris?
N a. 21°35.2'N N b. 21°52.5'N Y c. 22°03.6'N N d. 22°22.6'N 750: On 28 October , at 1754 ZT, your vessel's DR position is LAT 28°30'N, LONG 63°24'W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28°42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?
N a. 28°25.2'N N b. 28°30.6'N Y c. 28°34.9'N N d. 28°41.3'N 826: On 5 May , in DR position LAT 38°34.5'N, LONG 124°20.7'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 07h 59m 10s, and the chronometer error is 01m 10s slow. The sextant altitude (hs) is 67°27.0'. The index error is 1.4' on the arc, and your height of eye is 30 feet. What is the latitude at meridian transit?
N a. LAT 38°26.4'N N b. LAT 38°30.2'N Y c. LAT 38°36.0'N N d. LAT 38°41.2'N 1183: On 25 June , your 0900 zone time DR position is LAT 24°10.0'S, LONG 148°30.0'W. Your vessel is on a course of 230°T at a speed of 18.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1154 N b. 1156 Y c. 1200 N d. 1204 1193: On 26 September , your 0830 zone time DR position is LAT 23°04.0'N, LONG 129°16.0'E. Your vessel is on course 119°T at a speed of 20.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1158 N b. 1205 Y c. 1210 N d. 1214 1195: On 23 June , your 0900 zone time DR position is LAT 21°26.0'N, LONG 137°46.0'W. Your vessel is on course 059°T at a speed of 19.0 knots. What is the zone time of local apparent noon (LAN)?
N a. 1159 N b. 1205 Y c. 1210 N d. 1214 1491: On 5 February , your 2320 ZT position is LAT 52°28'N, LONG 23°48'W. You observe Polaris bearing 000.2°pgc. At the time of the observation the helmsman noted that he was heading 224°pgc and 244°psc. The variation is 20°W. What is the deviation for that heading?
N a. 0.0° Y b. 1.5°W N c. 3.0°W N d. 4.5°W 1650: On 22 October , in DR position LAT 21°51.0'S, LONG 76°24.0'E, you observe an amplitude of the Sun. The Sun's center is on the visible horizon and bears 256°psc. The chronometer reads 01h 01m 25s and is 01m 15s fast. Variation for the area is 2°E. What is the deviation of the standard magnetic compass?
N a. 0.3°E Y b. 0.3°W N c. 2.0°E N d. 2.0°W 1680: On 31 October , your 1700 zone time DR position is LAT 27°17.0'N, LONG 116°10.0'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 246.5° per standard magnetic compass. Variation in the area is 8.5°E. The chronometer reads 01h 01m 23s and the chronometer error is 01m 54s slow. What is the deviation of the standard compass?
N a. 0.8°E Y b. 0.8°W N c. 2.5°E N d. 2.5°W 1721: What is the total length of the trip?
Y a. 850.6 miles N b. 894.8miles N c. 922.5 miles N d. 946.5 miles 1749: Which light characteristics does Black Hawk Light (mile 318.3 AHP) have?
N a. 1 red flash every 4 seconds N b. 1 green flash every 4 seconds Y c. 1 white flash every 4 seconds N d. 2 white flashes every 5 seconds 1810: You are turning for 9 mph, approaching Fort Adams Lt. (mile 311.4 AHP) and it is reported that the current at Knox Landing is estimated at 4.5 MPH. Which of the following statements is TRUE?
Y a. Tows and other vessels should navigate as close to the left descending bank as safety will permit. N b. The inflow channel is a navigable channel for any vessel. N c. You are making 13.5 mph over the ground. N d. Old River Control Structure Light and Fort Adams Light may be used as range lights when entering the outflow channel. 1875: On 2 October , your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 68°03.6' bearing 154°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?
Y a. Alpha Indi N b. Epsilon Cygni N c. Gamma Aquilae N d. Albireo 1887: On 8 April , your evening DR position is LAT 22°16.0'N, LONG 157°58.3'W. You observe an unidentified star bearing 271°T at an observed altitude (Ho) of 44°08.2'. The chronometer reads 05h 09m 57s, and is 01m 23s slow. What star did you observe?
N a. Betelgeuse Y b. Aldebaran N c. Alnilam N d. Bellatrix 1953: You are downbound when you observe on your Mississippi River map a circel with black and white quadrants on the left bank. This indicates a __________.
Y a. river gage N b. daymark N c. control tower N d. information board 2031: After passing Wilkinson Lt. (mile 310.0 AHP) you see a flashing amber light on the right descending bank ahead. The flashing light indicates that you should __________.
N a. stay in the deepest water N b. slow down due to dredging operations N c. keep as close to the right descending bank as safety permits Y d. keep as close to the left descending bank as safety permits 2104: What type of bottom is found at Long Sand Shoal?
N a. Rocky N b. Muddy N c. Sandy Y d. Hard 2159: On 25 May , your vessel's 1858 zone time position is LAT 21°05.0'N, LONG 143°27.0'E. At that time a sextant observation of the planet Venus was made. The sextant altitude is 12°53.4' and the chronometer reads 08h 59m 15s. The index error is 4.5' off the arc, and the chronometer error is 01m 25s fast. Your height of eye is determined to be 55.0 feet. What is the azimuth (Zn) of the sight using the assumed position?
N a. 069.6°T N b. 110.4°T N c. 249.6°T Y d. 290.4°T 2285: You observe the lower limb of the Sun at a sextant altitude (hs) of 45°49.7' on 13 November . The index error is 1.0' on the arc. The height of eye is 61 feet (18.6 meters). What is the observed altitude (Ho)?
N a. 45°59.3' Y b. 45°56.4' N c. 45°52.9' N d. 45°49.8' 2322: At 1032 on 24 June, you pass Carolina Landing Light (mile 508.8 AHP). What has been the average current since 2350, 23 June, if you have been making turns for 9.0 mph?
Y a. 0.5 mph N b. 1.5 mph N c. 5.7 mph N d. 8.5 mph 2405: You are underway and intend to make good a course of 350°T. You experience a current with a set and drift of 070°T at 1.5 knots, and a westerly wind produces a leeway of 4°. You adjust your course to compensate for the current and leeway, while maintaining an engine speed of 10 knots. What will be your speed made good over your intended course of 350°T?
N a. 9.4 knots N b. 9.8 knots Y c. 10. 2knots N d. 10.6 knots 2456: You have steamed 520 miles at 22 knots and burning 319 barrels of fuel per day. You must decrease your consumption to 137 barrels per day with 410 miles left in your voyage. What must you reduce your speed (kts) to in order to burn this amount of fuel?
N a. 12.8 N b. 14.8 Y c. 16.2 N d. 18.2 2651: You are steering 246°T, and a light is picked up dead ahead at a distance of 14 miles at 1037. You change course to pass the light 2.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 2.5 miles off the light?
N a. 1143 Y b. 1146 N c. 1149 N d. 1152 2704: You are underway on course 340°T at a speed of 14.8 knots.
You sight a buoy bearing 342°T at a radar range of 4.8 miles at 1422. If you change course at 1428, what is the true course to steer to leave the buoy abeam to port at 1.0 mile?
N a. 327°T N b. 354°T N c. 357°T Y d. 001°T 2705: While on a course of 192°T, a light bears 11° on the starboard bow at a distance of 12.7 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard?
N a. 167°T N b. 173°T N c. 185°T Y d. 189°T 3062: The propeller on your vessel has a pitch of 22.8 feet. From 0800, 18 April, to 1020, 19 April, you steamed an observed distance of 403.6 miles. If your average RPM was 74, what was the slip?
N a. +7.0% N b. -7.0% Y c. +8.0% N d. -8.0% 3106: You are turning 85 RPM, with a propeller pitch of 19 feet, and an estimated slip of +3%. What is the speed of advance?
N a. 14.7 knots Y b. 15.5 knots N c. 16.4 knots N d. 17.1 knots 3262: You have steamed 632 miles at 18.5 knots, and consumed 197 tons of fuel. If you have 278 tons of usable fuel remaining, how far can you steam at 15.0 knots?
N a. 681 miles N b. 892 miles N c. 1100 miles Y d. 1357 miles 3312: You have steamed 199 miles and consumed 23.0 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 410 miles?
N a. 32.6 tons N b. 39.9 tons Y c. 47.4 tons N d. 97.6 tons 3639: You desire to make good a true course of 132°. The variation is 10°W, magnetic compass deviation is 5°E, and gyrocompass error is 5°W. A northeast by east wind produces a 5° leeway. What is the course to steer per standard magnetic compass to make the true course good?
Y a. 132°psc N b. 135°psc N c. 137°psc N d. 142°psc 12703: You are on course 025° per standard magnetic compass when you take the following bearings: Point Judith Light - 072°psc Block Island North Point Light - 118°psc Watch Hill Light - 306°psc What s your position?)
N a. LAT 41°14.9'N, LONG 71°43.2'W N b. LAT 41°15.1'N, LONG 71°44.0'W Y c. LAT 41°15.4'N, LONG 71°43.1'W N d. LAT 41°15.6'N, LONG 71°42.8'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 13809: Which chart, of the same scale, continues eastward from this chart?
Y a. 13205 N b. 13212 N c. 13214 N d. 13216 14303: What is the height above the water of light No. 84 on the Columbia River below Bonneville lock & dam?
N a. 10 feet Y b. 14 feet N c. 18 feet N d. 24 feet 14703: At 0800 your vessel is at mile 110 proceeding in an easterly direction on the Columbia River. At 1030 Reed Island is abeam to port as you pass the 125 mile mark. What has been your average speed in knots?
N a. 4.3 knots Y b. 5.2 knots N c. 8.7 knots N d. 10.0 knots 15346: At 1942 Point Judith bears 030°T and has a range of 3.6 miles and Sandy Point has a range of 5.3 miles. What was your speed made good from your 1850 position?
N a. 12.5 knots Y b. 13.0 knots N c. 13.5 knots N d. 14.0 knots 15515: You decide to use the 9960-Y and 9960-W rates. At 1915,
you obtain the following readings:
9960-Y-43936.0
9960-W-14653.3
What is your 1915 position?
N a. LAT 41°13.0'N, LONG 71°54.0'W N b. LAT 41°13.1'N, LONG 71°53.9'W N c. LAT 41°13.2'N, LONG 71°54.3'W Y d. LAT 41°13.2'N, LONG 71°53.7'W 15709: At 0830, you obtained the following radar informations:
Branford Reef Light bearing 259° true @ 4.2 nm
What is your vessel's position?
N a. LAT 41°12.4'N, LONG 73°56.0'W N b. LAT 40°17.4'N, LONG 73°54.0'W N c. LAT 41°12.0'N, LONG 72°53.8'W Y d. LAT 41°12.4'N, LONG 72°53.8'W 15719: On chart 12354, the datum from which heights of objects are taken is __________.
Y a. mean high water N b. mean low water N c. lowest low water N d. mean lower low water 15740: At 2000 Montauk Point Light bears 010°T. At 2030 Montauk Point Light bears 348°T. Assuming that you are making good your course of 046°T and a speed of 9 knots, what is your 2030 running fix position?
N a. LAT 40°53.9'N, LONG 71°51.3'W Y b. LAT 40°54.2'N, LONG 71°50.2'W N c. LAT 40°55.9'N, LONG 71°49.0'W N d. LAT 40°56.7'N, LONG 71°48.1'W 15757: If you change course at 0610, what is the course to steer per gyro compass to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")?
N a. 072°pgc Y b. 076°pgc N c. 080°pgc N d. 084°pgc 15962: Based on dead reckoning, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone N b. depart a restricted area N c. cross a submerged pipeline Y d. depart a regulated area 15966: The yellow buoys on either side of your vessel that lead to Mobjack Bay mark __________.
N a. the limits of the dredged channel Y b. fish trap areas N c. underwater cable areas N d. ferry routes 16120: At 0812, you are on course 132°T. The standard magnetic compass reads 135°. What should you conclude?
N a. The deviation table is correct for that heading. N b. You should adjust the magnetic compass. Y c. Your compass may be influenced by a local magnetic disturbance. N d. The deviation is increasing as you go south. 16318: What true course and speed did you make good between 0730 and 0900?
N a. 273°T, 8.7 knots Y b. 277°T, 8.4 knots N c. 279°T, 8.0 knots N d. 284°T, 7.5 knots 16470: The wind is easterly and will cause 2° of leeway. The current is 180° 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. 307°T N c. 310°T Y d. 315°T 16720: In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 074°
pgc. The helmsman was steering 303°pgc and 315° per standard magnetic compass at the time. Which of the following is TRUE?
Y a. The gyro error is still 2°E. N b. The deviation based on the observation is 15°W. N c. The magnetic compass error is 12°W. N d. The true line of the range is 072°.