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.
62: The Greenville Gage reads 10.6 feet. The high point of your towboat is 54 feet above water. What is the vertical clearance as you pass under the Greenville Highway Bridge?
N a. 75.4 feet Y b. 65.4 feet N c. 54.2 feet N d. 44.4 feet 100: Which of the following statements concerning the buoys on the Mississippi River is TRUE?
Y a. Buoy locations may be changed to indicate the channel for the existing river stage. N b. The buoys are maintained on station year round. N c. Buoys have permanent moorings on the river bottom and will not shift position. N d. The position of river buoys can be determined by consulting the latest Light List - Vol. V. 127: After entering Milliken Bend (mile 455 AHP) you wish to locate the river service in Madison Parish, Louisiana. The river service is indicated by the square containing which number?
N a. 7 N b. 6 N c. 5 Y d. 4 151: What is the distance from the Memphis Gage to the Redneb Services Dock in New Orleans, LA.
N a. 460 miles N b. 503 miles N c. 588 miles Y d. 633 miles 187: 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 Y c. 75°40.5'W N d. 75°41.4'W 365: 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. 9.4 knots N b. 9.2 knots Y c. 8.8 knots N d. 8.3 knots 472: The great circle distance from LAT 38°17.0'N, LONG 123°16.0'W to LAT 35°01.0'N, LONG 142°21.0'E is 4330 miles and the initial course is 300.9°T. The latitude of the vertex is 47°40.5'N. What is the longitude of the vertex?
N a. 173°04.6'E N b. 167°18.0'E N c. 173°04.6'W Y d. 167°18.5'W 519: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?
N a. 227°psc N b. 233°psc N c. 258°psc Y d. 262°psc 536: Determine the distance from LAT 63°54.0'N, LONG 04°52.0'E to LAT 63°54.0'N, LONG 18°24.0'W by parallel sailing.
N a. 608.6 miles N b. 610.9 miles N c. 612.3 miles Y d. 614.2 miles 600: What is the brown colored tint shown at Bordeaux Point Dykes (mile 681.0 AHP)?
N a. river gage N b. fish hatchery N c. levee Y d. dredge material 819: On 27 March , in DR position LAT 32°31.0'N, LONG 76°25.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 05h 23m 32s, and the chronometer error is 01m 30s fast. The sextant altitude (hs) is 59°59.0'. The index error is 1.8' off the arc, and your height of eye is 52 feet. What is the latitude at meridian transit?
N a. LAT 32°21.6'N Y b. LAT 32°29.5'N N c. LAT 32°37.6'N N d. LAT 32°46.2'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 996: On 30 August your 0554 zone time (ZT) position was LAT 25°39.0'S, LONG 31°51.0'E. Your vessel was steaming on course 325°T at a speed of 15.0 knots. An observation of the Sun's lower limb was made at 0836 ZT. The chronometer read 06h 38m 36s and was fast 02m 24s. The observed altitude (Ho) was 30°49.2'. LAN occurred at 1157 ZT. The observed altitude (Ho) was 56°40.0'. What was the longitude of your 1157 ZT running fix?
N a. 30°59.8'E N b. 30°57.6'E N c. 30°55.9'E Y d. 30°52.5'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 1225: You estimate the current at 2.0 mph. What is the speed over the ground?
N a. 9.5 mph Y b. 5.5 mph N c. 5.0 mph N d. 4.5 mph 1469: On 2 March , your 2216 ZT DR position is LAT 21°20.0'S, LONG 17°10.0'W. At that time, you observe Saturn bearing 078°psc. The chronometer reads 11h 14m 04s, and the chronometer error is 02m 20s slow. The variation is 4.5°W. What is the deviation of the standard compass?
N a. 1.5°W N b. 1.6°E N c. 2.9°W Y d. 3.6°E 1683: You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PPE" repeated several times followed by a short dash (0.4 sec), 60 dots (0.1 sec each) and another short dash. At the beginning of the last dash, the comparing watch reads 07h 30m 08s. When compared to the chronometer, the comparing watch reads 07h 31m 48s, and the chronometer reads 07h 32m 16s. What is the chronometer error?
N a. 0m 28s slow N b. 1m 40s slow N c. 0m 08s fast Y d. 0m 36s fast 1754: At 0715, on 24 May, you are abreast the St. Catherine Bar Lt. (mile 348.6 AHP). If you are turning for 8.0 mph, what has been the average current since you left Baton Rouge?
N a. 1.0 mph N b. 1.4 mph Y c. 3.8 mph N d. 4.4 mph 1764: The Gage at Red River Landing reads 43.4 feet. The low water reference plane (LWRP) for Red River Landing, LA. Is 10.6 ft. How many feet is this above the low water reference plane?
N a. 10.6 ft N b. 11.6 ft N c. 22.2 ft Y d. 32.8 ft 1857: On 22 May , your 0437 ZT DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 097°T at an observed altitude (Ho) of 48°20.0'. The chronometer reads 07h 40m 40s and is 03m 24s fast. What star did you observe?
Y a. Markab N b. Diphda N c. Sabik N d. Hamal 1901: On 22 April , your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 248°T at an observed altitude (Ho) of 25°00.9'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?
Y a. Rigel N b. Betelgeuse N c. Gienah N d. Arcturus 2180: On 12 April , at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What are the intercept (a) and azimuth (Zn) from the assumed position of this sight?
N a. Zn 057.7°, a 15.4' T Y b. Zn 057.0°, a 17.7' A N c. Zn 122.3°, a 17.7' A N d. Zn 123.0°, a 22.7' A 2180: On 12 April , at 0515 ZT, morning stars were observed, and the vessel's position was determined to be LAT 21°05'S, LONG 16°30'W. Your vessel is steaming at 19 knots on a course of 278°T. A sextant observation of the Sun's lower limb is made at 0930 ZT. The chronometer reads 10h 28m 25s, and the sextant altitude (hs) is 40°15.9'. The index error is 2.5' off the arc, and the chronometer error is 2m 15s slow. Your height of eye on the bridge is 57 feet. What are the intercept (a) and azimuth (Zn) from the assumed position of this sight?
N a. Zn 057.7°, a 15.4' T Y b. Zn 057.0°, a 17.7' A N c. Zn 122.3°, a 17.7' A N d. Zn 123.0°, a 22.7' A 2290: You observe the lower limb of the Sun at a sextant altitude (hs) of 75°12.3' on 6 August . The index error is 1.5' off the arc. The height of eye is 32 feet (9.8 meters). What is the observed altitude (Ho)?
N a. 75°18.6' Y b. 75°24.0' N c. 75°30.7' N d. 75°34.6' 2370: As you pass under the Vicksburg Bridges, you estimate the current as 3.0 mph. What is the speed over the ground, if your vessel is making turns for 10.5 mph?
N a. 16.5 mph Y b. 13.5 mph N c. 10.5 mph N d. 7.5 mph 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 2709: If the highest point of your towboat is 54 feet above the water and the Natchez Gage reads 24.8 feet, what will be your vertical clearance when passing under the Natchez-Vidalia westbound Highway Bridge?
N a. 35.9 feet Y b. 47.2 feet N c. 49.6 feet N d. 57.5 feet 3071: If the speed necessary for reaching port at a designated time is 20.7 knots and the pitch of the propeller is 23.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 3% negative slip?
N a. 74 N b. 79 Y c. 86 N d. 98 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 11306: At 1919 your position is LAT 37°00.0'N, LONG 75°30.0'W. At 1950 your position is LAT 36°59.5'N, LONG 75°37.0'W. What is the speed made good?
N a. 5.6 knots N b. 8.2 knots N c. 9.1 knots Y d. 10.9 knots 11508: At 1014 you depart the entrance to Lake Montauk with light "1" close aboard. Your course is 066° per standard magnetic compass, and the speed is 8.6 knots. At 1232 your position is LAT 41°20.0'N, LONG 71°40.0'W. What is the speed made good?
N a. 8.2 knots Y b. 8.5 knots N c. 8.9 knots N d. 9.2 knots 12508: You are on course 319° per standard magnetic compass when you take the following bearings: New Point Comfort Light "2" 244°psc Horn Harbor Entrance Light "HH" 267°psc Wolf Trap Light 335°°psc What is the position of the fix?
N a. LAT 37°20.9'N, LONG 76°09.7'W N b. LAT 37°21.0'N, LONG 76°09.2'W N c. LAT 37°21.0'N, LONG 76°09.9'W Y d. LAT 37°21.1'N, LONG 76°09.5'W 13406: You are planning to anchor your vessel at LAT 41°01.1'N, LONG 73°02.8'W. What type of bottom should you expect at this position?
N a. Gray sand N b. Soft mud Y c. Gray mud N d. Hard sand 13503: You are proceeding from a point 4 miles due east of Montauk Point enroute to Long Island Sound via The Race. You should expect the soundings to __________.
N a. remain fairly constant N b. increase rapidly at first then remain constant until through the Race Y c. start increasing when north of Montauk Point N d. be inaccurate due to sound absorption by the mud bottom 13707: The level of mean high water at Old Point Comfort is how many feet above the sounding datum?
N a. 1.5 feet N b. 2.2 feet Y c. 2.5 feet N d. 3.5 feet 13906: When approaching Block Island Sound from Long Island Sound, you will enter waters governed by the International Rules of the Road when you __________.
Y a. pass through The Race N b. cross the territorial sea boundary N c. exit Block Island Sound to the east or south N d. None of the above, as Long Island Sound is governed by the International Rules of the Road 14003: At 1430 your vessel passes under the Interstate 5 highway bridge east bound. Your engines are making RPM's for 12 mph. If the current is ebbing at 3 mph, what is your ETA at Bonneville Lock?
N a. 1744 N b. 1753 N c. 1834 Y d. 1848 15024: Which of the following statements regarding buoys on the Mississippi River is TRUE?
N a. The positions of river buoys can be found in the latest edition of Light List-Vol. V. Y b. Buoy positions on the chart are approximate. N c. The buoys are maintained on station year round. N d. The buoys do not shift positions due to permanent moorings. 15230: What is the distance from Cairo Point, IL, to Arkansas City?
N a. 28 miles N b. 110 miles N c. 292 miles Y d. 400 miles 15246: From your 1845 position, you desire to leave Stratford Shoal Middle Ground Light 1.0 mile off your starboard beam at 1900. Which course and speed would you order if you allow for a 2.0 knot current with a set of 180°T?
N a. 205°T at 9.2 knots N b. 208°T at 11.4 knots Y c. 215°T at 9.2 knots N d. 225°T at 11.5 knots 15420: You are entering Norfolk Harbor and have just passed Craney Island. Which chart should you use for your final approach into Norfolk Harbor?
N a. 12223 N b. 12238 N c. 12248 Y d. 12253 15610: 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"
(LL#375)?
N a. 249.0° N b. 251.5° N c. 255.0° Y d. 257.0° 15624: The Gage at Red River Landing reads 22.2 feet. The low water reference plane for Red River is 10.6 feet. How many feet is this above the low water reference plane?
N a. 10.6 ft Y b. 11.6 ft N c. 22.2 ft N d. 32.8 ft 15823: As you approach Shreves cut-off you see Red River Landing Gage (302.4 AHP) which reads 6.2 feet. The Low Water Reference Plane (LWRP) for Red River is 10.6. Which of the following statements is TRUE?
Y a. This reading is at 4.4 ft. below the Low Water Reference Plane. N b. This reading is 6.2 ft. above the Low Water Reference Plane. N c. The depth of water at Red River Landing is 6.2 ft. N d. A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River. 15842: From your 2030 fix you change course to 195°T, and leave the engine speed at 14 knots.
At 2045, Your position is L 37° 13.50'N Long 075° 38.05' W
Which statement is TRUE?
Y a. Cape Charles Light bears 050° relative. N b. Chesapeake Light bears 190° relative. N c. Your fathometer reading is approximately 40 fathoms. N d. Your vessel is located in a restricted area. 16010: The characteristic of Branford Reef Light is __________.
N a. flashing red every 4 seconds N b. flashing red every 3 seconds Y c. flashing white every 6 seconds N d. flashing yellow every 4 seconds 16020: If visibility permits, Orient Point Light will break the horizon at a range of about __________.
N a. 9.3 miles N b. 10.8 miles Y c. 13.9 miles N d. 17.0 miles 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 16558: From your position you observe a rotating white and green light to the north. This light is most likely __________.
Y a. at an airport N b. on a naval mine-countermeasures vessel N c. "Block Island North Light" N d. on a vessel engaged in public safety activity 16714: What was the current between 0520 and 0600?
N a. 201° at 1.0 knot N b. 201° at 1.5 knot N c. 021° at 1.0 knot Y d. 021° at 1.5 knots