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.
40: Which of the following statements regarding aids to navigation shown in the Army Corps. of Engineers map book is TRUE?
N a. The U.S. Army Corps.. of Engineers is responsible for placing and maintaining all aids to navigation. N b. Buoy positions as shown on the chart are exact. Y c. Buoys should always be given as wide a berth as possible. N d. Lights and daymarks are always shown in their exact location. 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 98: At 0230 on 13 August, you are at mile 610.5 AHP when you see about a mile ahead lights on the water near the left bank. What might you see when you come abreast of these lights?
N a. Privately maintained buoys at a yacht club N b. Government buoys marking the Hurricane Point dikes Y c. Barges moored at the Dennis Landing Terminal N d. A pipeline discharging dredge spoil 269: If there is no current, what is the course per standard magnetic compass from your 0802 fix to the position 1.1 miles north of Falkner Island Light?
N a. 099° Y b. 095° N c. 068° N d. 064° 277: What chart should you use after you enter New London Harbor?
N a. 13211 N b. 13214 Y c. 13213 N d. 13272 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° 427: Assuming no current, at what time can you expect to be abeam of Townshend Ledge Lighted Buoy?
Y a. 0910 N b. 0905 N c. 0902 N d. 0859 596: At 0921, on 24 July, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 10.0 mph, what was the current since departure?
N a. 1.4 mph Y b. 1.7 mph N c. 2.0 mph N d. 7.0 mph 605: At 0915 ZT, on 26 July , you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated ZT of arrival at Seattle?
Y a. 0728, 7 August N b. 1528, 7 August N c. 0028, 8 August N d. 1528, 8 August 655: On a North Pacific voyage, you wish to sail the shortest distance from LAT 46°05'N, LONG 124°00'W to LAT 44°00'N, LONG 150°00'E. You do not want to exceed 50°N latitude due to anticipated fog conditions. Which voyage plot meets these requirements? (Use gnomonic tracking chart WOXZC 5270)
N a. A great circle between departure and arrival with Mercator legs north of the Aleutians N b. A great circle between departure and arrival with parallel sailing where the track intersects the 50°N parallel Y c. A great circle to 50°N, 153°W, parallel sailing to 50°N, 173°W, then a great circle to arrival N d. A great circle from departure to the mid-longitude at 50°N, then another great circle to arrival 671: You are on a voyage from Nome to Honolulu via Unimak Pass (LAT 54°30'N, LONG 164°30'W). The great circle track passes through a point at LAT 38°00'N, LONG 161°40'W. Using gnomonic chart WOXZC5270, determine which answer is TRUE. (The great circle distance, Unimak Pass to Honolulu, is 2013 miles.)
N a. A great circle track results in a significant savings in distance when compared to a rhumb line. N b. The northern vertex of the great circle track would lie between Unimak Pass and Nome. N c. Distance of the great circle track is measured by using the length of degree of latitude at the mid-latitude of the track. Y d. A great circle course would offer no significant advantage because the rhumb line course is close to 180°. 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 1127: You are turning for 6.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?
N a. 6.8 mph Y b. 7.8 mph N c. 8.8 mph N d. 9.4 mph 1137: What is the length of the trip?
N a. 1195.4 miles N b. 1223.1 miles N c. 1464.8 miles Y d. 1520.1 miles 1228: As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads 8.9 ft. If the highest point on your vessel is 54 ft. above the water, what is your vertical clearance?
Y a. 63.1 feet N b. 65.3 feet N c. 67.2 feet N d. 122.0 feet 1342: What is the vertical clearance between the highest point of your towboat, if it is 45 feet above the water, and if the Natchez Gage reads 23.4 feet when passing under the Natchez-Vidalia Westbound Highway Bridge?
N a. 67.5 feet Y b. 57.1 feet N c. 52.2 feet N d. 45.2 feet 1410: What is the distance from the Amoco Docks at Baton Rouge, LA, to Pittsburgh, PA?
Y a. 1681 miles N b. 1575 miles N c. 981 miles N d. 727 miles 1451: On 11 December , your 1816 ZT DR position is LAT 26°30.0'N, LONG 140°35.0'E. At that time, you observe Venus bearing 230°pgc. The chronometer reads 09h 14m 52s and the chronometer error is 01m 02s slow. The variation is 3.5°E. What is the gyro error?
N a. 2.2°E Y b. 3.3°E N c. 3.2°W N d. 4.2°W 1477: On 27 June , your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?
N a. 1.5°E N b. 1.9°W Y c. 3.0°W N d. 3.0°E 1500: On September 9 , your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error?
Y a. 0.7°E N b. 1.2°E N c. 0.8°W N d. 9.4°W 1565: Which of the following statements concerning the buoys on the Mississippi River is TRUE?
N a. The position of river buoys can be determined by consulting the latest Light List - Vol. V. N b. A preferred channel mark is a lateral mark indicating a channel junction which must always be passed to starboard. Y c. Setting a buoy is the act of placing a buoy on assigned position in the water. N d. None of the above. 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 1722: You estimate the current as 2.0 mph. What is the speed over the ground?
N a. 4.5 mph Y b. 5.5 mph N c. 7.5 mph N d. 9.5 mph 1778: At 2234 ZT, on 14 July , in DR position LAT 34°03'N, LONG 150°16'W you observe an amplitude of Saturn. The planet is about one Sun's diameter above the visible horizon and bears 272.1°pgc. The variation is 14°E. What is the gyro error?
N a. 0.5°W N b. 0.5°E Y c. 1.5°W N d. 2.5°E 1859: On 22 March , your 0519 ZT DR position is LAT 27°20.6'N, LONG 69°25.6'W. You observe an unidentified star bearing 094°T, at an observed altitude (Ho) of 30°15.0'. The chronometer reads 10h 16m 47s and is 02m 15s slow. What star did you observe?
N a. Acamar Y b. Enif N c. Menkar N d. Rigel 2019: On 15 October , your 0300 zone time DR position is LAT 27°14'S, LONG 99°46'E. You are on course 128°T at a speed of 19 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Jupiter, Alphard, Betelgeuse N b. Mars, Regulus, Canopus N c. Achernar, Suhail, Alphard Y d. Achernar, Procyon, Aldebaran 2052: The highest point on your towboat is 48 feet above the water, and the Memphis Gage reads +7.5 feet. What is the vertical clearance when you pass under the Hernando Desoto Bridge in Memphis?
Y a. 53.2 feet N b. 58.1 feet N c. 68.2 feet N d. 96.3 feet 2076: What is the mile point of the Fulton Gage?
Y a. 778 AHP N b. 687 AHP N c. 632 AHP N d. 598 AHP 2124: If the visibility is 10 miles and you are in the red sector, at what distance off should you sight Cape Henry Light?
Y a. 15 miles N b. 12 miles N c. 10 miles N d. 08 miles 2167: On 4 July , at 0630 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°15.0'S, LONG 21°20.0'W. Your vessel is steaming at 13.0 knots on a course of 146°T. A sextant observation of the Sun's lower limb is made at 0915 ZT. The chronometer reads 10h 14m 27s, and the sextant altitude is 25°29.8'. The index error is 3.1' off the arc, and the chronometer error is 0m 53s slow. Your height of eye on the bridge is 48.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
Y a. 049.5°T N b. 052.6°T N c. 054.3°T N d. 058.9°T 2328: As you pass through the Chesapeake Bay Bridge and Tunnel, you sight Trestle "B" in line bearing 018°pgc. What is the gyro error by observation?
N a. 2°E Y b. 0° N c. 2°W N d. 4°W 2392: Which company does NOT have a marine facility in Rosedale harbor (mile 585 AHP)?
N a. Sanders Elevator Corp N b. Rosedale-Boliver County Port Commission Y c. T.L. James N d. Cives Steel Company 3257: You have steamed 824 miles at 15.5 knots, and consumed 179 tons of fuel. If you have 221 tons of usable fuel remaining, how far can you steam at 18 knots?
N a. 495 miles N b. 650 miles Y c. 754 miles N d. 876 miles 3752: While your vessel is proceeding down a channel you notice a range of lights in line with your vessel's mast. If your vessel is on course 001° per gyro compass and the charted value of the range of lights is 359°T, what is the gyro compass error?
Y a. 2°W N b. 2°E N c. 1°E N d. 1°W 10109: What is the base course (psc) in the inbound northeasterly traffic lane of the Chesapeake Bay entrance traffic separation scheme?
Y a. 261°psc N b. 258°psc N c. 250°psc N d. 244°psc 10109: What is the base course (psc) in the inbound northeasterly traffic lane of the Chesapeake Bay entrance traffic separation scheme?
Y a. 261°psc N b. 258°psc N c. 250°psc N d. 244°psc 11102: What is the velocity of the first PM (Daylight Savings Time) maximum ebb current at Plum Gut on 10 August 1983?
N a. 3.3 knots N b. 4.0 knots N c. 4.5 knots Y d. 5.4 knots 11401: At 1520 your GPS position is LAT 41°13.1'N, LONG 72°16.1'W. At 1630 your position is LAT 41°17.5'N, LONG 72°04.7'W. What were your true course and speed made good?
N a. 344° at 8.2 knots N b. 077° at 9.5 knots Y c. 063° at 8.3 knots N d. 059° at 8.1 knots 11805: What is the true course to steer between Stratford Shoal (Middle Ground Light) and New Haven Light, if the set and drift of the current are 048°T at 2 knots, and a southeasterly wind will cause 2° of leeway? Your engines are making turns for 10 knots.
N a. 032°T Y b. 037°T N c. 039°T N d. 041°T 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 12500: You are on course 135° per standard magnetic compass when you take the following bearings per standard magnetic compass: Cape Henry Light 266° Cape Charles Light 353°Chesapeake Light 124° What is your position?
Y a. LAT 36°57.3'N, LONG 75°50.9'W N b. LAT 36°57.5'N, LONG 75°50.1'W N c. LAT 36°57.6'N, LONG 75°51.6'W N d. LAT 35°57.9'N, LONG 75°50.8'W 13309: What type of bottom can be expected at the northern end of York Spit Channel?
N a. Hard clay N b. Fine gray sand N c. Soft black mud Y d. Mud and sand 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 13706: What is the horizontal clearance of the navigation opening of Trestle B of the Chesapeake Bay Bridge and Tunnel?
N a. 21 feet Y b. 70 feet N c. 75 feet N d. 300 feet 15112: Based on a DR, at approximately 1817 you would expect to __________.
N a. enter a traffic separation zone Y b. depart a regulated area N c. cross a submerged pipeline N d. depart a restricted area 15208: At 1750, your position is LAT 37°14.5'N, LONG 76°22.9'W. What was the course made good between 1730 and 1750?
N a. 072°T N b. 075°T Y c. 078°T N d. 080°T 15463: If you are making 10 knots, what is your ETA at York Spit Channel Buoys "19" and "20"?
N a. 0959 N b. 1002 Y c. 1006 N d. 1011 15816: At 0209, your position is LAT 41°01.8'N, LONG 72°40.8'W.
What course should you steer per standard magnetic compass to make good 278° magnetic? (assume no set and drift)
N a. 262.0°psc N b. 265.0°psc Y c. 275.5°psc N d. 280.5°psc 15864: At 0200, you take the following bearingss:
Mattituck Inlet Light bearing 125°pgc
Falkner Island Light bearing 355°pgc
What is the position of your 0200 fix?
Y a. LAT 41°03.9'N, LONG 72°38.9'W N b. LAT 41°03.8'N, LONG 72°39.1'W N c. LAT 41°03.7'N, LONG 72°38.5'W N d. LAT 41°03.5'N, LONG 72°38.8'W 15917: At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?
N a. 5.9 nm N b. 6.9 nm N c. 12.0 nm Y d. 12.8 nm 15939: From your 1910 position, you set a course of 162°T at a speed of 14 knots. What will serve as a definite warning that you are being set towards Race Rock Light?
N a. Decreasing bearings to Race Rock Light Y b. Decreasing loran readings on loran rate 9960-W N c. Increasing soundings N d. Decreasing radar ranges to Race Point 16310: At 0730, your position is LAT 41°10.5'N, LONG 72°32.2'W. From this position you steer course 286°psc with an engine speed of 9.0 knots. What is the approximate depth of water under your keel?
Y a. 52 feet (15.8 meters) N b. 57 feet (17.3 meters) N c. 62 feet (18.8 meters) N d. 67 feet (20.3 meters)