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.
39: At 1227, on 19 October, you pass under the Greenville Highway Bridge (mile 531.3 AHP). What speed must you average to arrive at Jimmy Hawken Light (mile 663.5 AHP) at 0930 the following day?
Y a. 6.3 mph N b. 5.9 mph N c. 5.6 mph N d. 5.2 mph 68: The river will be temporarily closed to navigation at mile 531.3 AHP due to repairs to the bridge. This will occur at 1300, 5 January, and last for six hours. What minimum speed over the ground must you make from Red River Landing Gage in order not to be delayed?
N a. 7.3 mph N b. 6.8 mph Y c. 6.4 mph N d. 6.0 mph 75: What is your ETA at the Memphis Highway Bridge?
N a. 1813, 22 Sept N b. 1405, 22 Sept Y c. 1052, 22 Sept N d. 0828, 22 Sept 174: Which of the following concerning Thimble Shoal Channel is TRUE?
N a. Only deep-draft passenger ships and large naval vessels may use the main channel. Y b. A tow drawing 20 feet is excluded from the main channel. N c. The channel is 14.5 miles in length. N d. Thimble Shoal Channel is in international waters. 268: What publication contains information on the navigational hazards in the vicinity of Falkner Island?
N a. The navigational regulations in Title 46, Code of Federal Regulations Y b. U.S. Coast Pilot N c. U.S. Coast Guard Light List N d. Inland Navigation Rules 278: The National Weather Service provides 24 hour weather broadcasts to vessels transiting the Chesapeake Bay Bridge Tunnel area on which frequency?
Y a. 162.55 MHz N b. 162.85 MHz N c. 181.15 MHz N d. 202.35 MHz 285: At 1845, you plot the following bearing lines:
Old Plantation Flats Light bearing 251°true
New Point Comfort Light bearing 335°true
Your latitude is __________.
N a. 37°10.7'N N b. 37°10.9'N Y c. 37°11.2'N N d. 37°11.6'N 322: From your 2200 fix, you steer course 288°T to travel up the Thimble Shoal North Auxiliary Channel. If you are making good 6.0 knots, at what time would you expect to pass buoy "18" at the west end of the channel? (There are no set and drift.)
N a. 2355 Y b. 2344 N c. 2335 N d. 2324 335: At 1810, you obtain the following bearings:
Cape Charles Light bearing 005° pgc
Cape Henry Light bearing 251.5° pgc
What is your position?
N a. LAT 36°56.0'N, LONG 75°58.5'W N b. LAT 36°55.4'N, LONG 75°56.0'W Y c. LAT 36°56.8'N, LONG 75°55.6'W N d. LAT 36°57.4'N, LONG 75°54.6'W 361: Which publication contains the specific information about navigating in York Spit Channel?
Y a. Coast Pilot N b. Light List N c. Chesapeake Bay Harbor- master's Regulations Manual N d. Navigator's Manual - Chesapeake Bay 419: At 0900, you take the following radar ranges:
Watch Hill Point 5.4 miles
Block Island Grace Point 8.3 miles
Which statement about this fix is TRUE?
N a. You are to the left of the track line. N b. The bottom in the area is sand and gravel. N c. You are governed by the Inland Rules. Y d. The fix is indeterminate. 428: At 0730, visibility is 5.5 miles. At what time will you lose sight of Horton Point Light?
N a. It is not visible at 0730 N b. 0733 Y c. 0751 N d. 0812 543: What was the current between 0520 and 0600?
N a. 201° at 1.0 knot N b. 201° at 1.5 knot Y c. 021° at 1.5 knot N d. 021° at 1.0 knots 551: You are on course 092°T, and the engines are turning for 8 knots. At 0452, you take the following bearings:
Stratford Point Light 020°pgc Stratford Shoal (Middle Ground) Light 141°pgc
What is your 0452 position?
Y a. LAT 41°05.2'N, LONG 73°07.8'W N b. LAT 41°05.0'N, LONG 73°07.5'W N c. LAT 41°05.0'N, LONG 73°07.3'W N d. LAT 41°04.8'N, LONG 73°07.3'W 618: Your vessel departs Seattle at 1010 zone time (ZD +8), on 28 May, bound for Apra, Guam (ZD -10). The distance by great circle is 4,948 miles, and you estimate that you will average 18.5 knots. What is your estimated zone time of arrival?
Y a. 0737, 9 June N b. 1737, 9 June N c. 1937, 9 June N d. 0737, 10 June 632: The Memphis Gage reads 18.4 feet. The high point of your towboat is 48 feet above water. What is the vertical clearance as you pass under the Memphis Highway Bridge?
Y a. 46.4 feet N b. 53.8 feet N c. 66.4 feet N d. 75.4 feet 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. 740: On 14 March , your 1846 ZT DR position is LAT 21°57.6'N, LONG 132°16.2'W. At that time you observe Polaris with a sextant altitude (hs) of 22°16.8'. The chronometer time of the sight is 03h 45m 10s, and the chronometer error is 01m 32s slow. The index error is 3.2' off the arc, and the height of eye is 44.9 feet. What is your latitude by Polaris?
N a. 21°32.4'N Y b. 21°49.8'N N c. 21°51.0'N N d. 21°53.1'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 982: On 15 August , your 0512 zone time position was LAT 29°18.0'N, LONG 57°24.0'W. Your vessel was steaming on course 262°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 0824 ZT. The chronometer read 00h 22m 24s and was slow 01m 34s. The observed altitude (Ho) was 38°16.7'. LAN occurred at 1204 zone time.
The observed altitude (Ho) was 74°58.0'. What was the longitude of your 1204 zone time running fix?
N a. LONG 59°52.0'W N b. LONG 59°54.0'W Y c. LONG 59°58.5'W N d. LONG 60°02.0'W 987: On 17 January , your 0730 zone time fix gives you a position of LAT 22°26.0'S, LONG 152°17.0'E. Your vessel is steaming on a course of 116°T at a speed of 17 knots. An observation of the Sun's lower limb is made at 1015 zone time. The chronometer reads 00h 13m 23s, and the chronometer error is 01m 49s slow. The observed altitude (Ho) is 66°02.1'. LAN occurs at 1152 zone time and a meridian altitude of the Sun's lower limb is made. The observed altitude (Ho) is 87°54.2'. Determine the vessel's 1200 zone time position.
Y a. LAT 22°53.8'S, LONG 153°25.6'E N b. LAT 22°53.8'S, LONG 153°28.8'E N c. LAT 22°56.3'S, LONG 153°25.6'E N d. LAT 22°56.3'S, LONG 153°28.8'E 1250: What facility is not found near La Grange Towhead Light (538.2 AHP) on Greenville Harbour?
N a. Mississippi Limestone N b. Ergon, Inc. N c. American Commercial Barge Lines Y d. Greenville Casino Wharf 1280: On 27 March , your 0330 zone time DR position is LAT 23°32'N, LONG 154°47'E. Your vessel is on a course of 105°T at a speed of 20 knots. What will be the zone time of sunrise at your vessel?
Y a. 0534 N b. 0557 N c. 0612 N d. 0624 1542: 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 1690: The locations of locks and dams can be found in the __________.
N a. Army Corps. of Engineers maps Y b. Light List N c. Local Notice to Mariners N d. Channel Report 1707: You are passing the Memphis Gage at 0405, 18 March. If you are turning for 8 mph and estimate the current at 2.3 mph,
what is your ETA at Cairo Point, IL (mile 954.5 AHP)?
N a. 0447, 19 Mar N b. 1052, 19 Mar N c. 1518, 19 Mar Y d. 1839, 19 Mar 1747: As you pass under the Greenville Highway Bridge, you estimate the current as 3.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph?
N a. 14.5 mph N b. 13.5 mph Y c. 12.5 mph N d. 11.5 mph 1855: On 22 July , your 0442 ZT DR position is LAT 26°35.6'N, LONG 22°16.7'W. You observe an unidentified star bearing 112°T, at an observed altitude (Ho) of 44°16.0'. The chronometer reads 05h 39m 03s and is 03m 14s slow. What star did you observe?
N a. Hamal N b. Rigel Y c. Menkar N d. Acamar 1921: On 17 March , your 1845 DR position is LAT 25°10.0'N, LONG 66°48.0'W. You observe an unidentified star bearing 340°T at an observed altitude (Ho) of 66°25.1'. The chronometer reads 10h 47m 49s, and is 1m 54s fast. What star did you observe?
Y a. Capella N b. Mirfak N c. Pollux N d. Rigel 2091: At your current speed of 22 knots you only have enough fuel remaining to travel 422 miles. You must travel 844 miles to reach your destination. What should you reduce your speed (knots) to in order to reach your destination?
N a. 19.8 N b. 18.4 N c. 17.0 Y d. 15.6 2179: On 22 June , at 0906 EDT (ZD +4), your position is LAT 24°36'N, LONG 69°30'W. You are on course 165°pgc at a speed of 14.8 knots. A sextant observation of the Sun's lower limb is made, and the sextant altitude (hs) is 42°44.0' with an index error of 0.8' off the arc. At this time the chronometer reads 01h 10m 12s, and is 2m 42s slow. If your height of eye is 70 feet, what is the azimuth (Zn) of the sight using the assumed position?
Y a. Zn 080.4° N b. Zn 081.6° N c. Zn 129.0° N d. Zn 130.5° 2286: You observe the lower limb of the Sun at a sextant altitude (hs) of 50°26.9' on 9 November . The index error is 1.5' on the arc. The height of eye is 56 feet (17 meters). What is the observed altitude (Ho)?
N a. 50°04.2' N b. 50°18.1' Y c. 50°33.5' N d. 50°41.4' 2663: You are on course 035°T, speed 18.3 knots. At 0719 you see a buoy bearing 036°T at a range of 4.1. If you change course at 0725 to leave the buoy abeam to port at 1.0 mile,
at what time will the buoy be abeam?
N a. 0740 N b. 0738 N c. 0735 Y d. 0732 2783: Which daymark would you see as you approach Red Store Light (mile 269.5 AHP)?
Y a. Green square N b. Green triangle N c. Green diamond N d. Red square 2894: You are steaming on a course of 071°T at 19 knots. At 1907 you observe a lighthouse bearing 122°T. At 1915 the lighthouse bears 154°T. What is your distance off at the second bearing?
N a. 3.4 miles Y b. 3.7 miles N c. 4.0 miles N d. 4.3 miles 2897: You are steaming on a course of 327°T at 13 knots. At 0207 you observe a lighthouse bearing 020°T. At 0226 the lighthouse bears 042°T. What is your distance off at the second bearing?
N a. 8.5 miles Y b. 8.9 miles N c. 9.2 miles N d. 9.7 miles 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 3096: If the pitch of the propeller is 20.1 feet, and the revolutions per day are 118,178, calculate the day's run allowing 6% negative slip.
N a. 367.2 miles N b. 381.6 miles N c. 398.4 miles Y d. 414.1 miles 3653: The true course between two points is 106°. Your gyrocompass has an error of 2°E and you make an allowance of 2° leeway for a south wind. What gyro course should be steered to make the true course good?
N a. 102°pgc N b. 104°pgc Y c. 106°pgc N d. 108°pgc 11709: Your position is LAT 37°00.0'N, LONG 75°30.0'W. What is the course to steer per standard magnetic compass to arrive at LAT 36°59.0'N, LONG 75°48.5'W, if you are making 7.8 knots, the current is 239°T at 1.3 knots, and a southeasterly wind is causing 3° of leeway?
N a. 271°psc N b. 274°psc Y c. 278°psc N d. 282°psc 12609: You are on course 239° per standard magnetic compass when you take the following bearings: Falkner Island Light 314°psc Duck Island West Breakwater Light 2DI 039°psc Horton Point Light 157°psc What is your position?
Y a. LAT 41°09.9'N, LONG 72°32.0'W N b. LAT 41°09.3'N, LONG 72°33.0'W N c. LAT 41°10.5'N, LONG 72°32.1'W N d. LAT 41°11.6'N, LONG 72°33.6'W 12700: You are on course 073° per standard magnetic compass when you take the following bearings: Watch Hill Point Light 037°psc Montauk Point Light 179°psc Race Rock Light 289°psc What is your position?
N a. LAT 41°13.6'N, LONG 71°54.6'W N b. LAT 41°13.7'N, LONG 71°53.8'W N c. LAT 41°13.7'N, LONG 71°54.9'W Y d. LAT 41°13.8'N, LONG 71°54.3'W 13403: Your vessel has become disabled and is dead in the water. Your GPS set fixes your position at LAT 41°12.1'N, LONG 72°43.5'W. You decide to anchor at this position. Which type of bottom should you expect?
N a. Soft clay and sand Y b. Soft mud and shell N c. Hard sand and rocks N d. Blue mud and gray sand 13501: What type of bottom is found off the southern coast of Long Island?
N a. Blue Mud N b. Shingle Y c. Brown Sand N d. Shells 13909: The irregular black line around a charted light such as Race Rock Light indicates that it is __________.
N a. unwatched Y b. surrounded by riprap N c. a minor light N d. constructed on an artificial island 14604: Contour elevations on this chart refer to heights in feet above mean __________.
N a. lower low water N b. high water N c. low water Y d. sea level 15411: From your 1830 fix, you continue south on a course of 150°T turning RPMs for 6 knots. You encounter a flood current in the direction of 330°T at 2 knots. Adjusting your course for set and drift, which course would you steer to make good a course of 150°T while turning RPMs for 6 knots?
N a. 144°T Y b. 150°T N c. 158°T N d. 162°T 15756: You are steering 087°pgc and turning for 6.8 knots. At 0600, you take the following bearings:
Little Gull Island Light bearing 085.5°pgc
Bartlett Reef Light bearing 043°pgc
What is your 0600 position?
Y a. LAT 41°12.1'N, LONG 72°13.8'W N b. LAT 41°12.1'N, LONG 72°14.6'W N c. LAT 41°12.3'N, LONG 72°14.7'W N d. LAT 41°12.5'N, LONG 71°14.9'W 15829: A stretch where the channel changes from one side of the river to the other is called a __________.
N a. passing N b. transit N c. transfer Y d. crossing 15867: You anticipate a maximum flood current north of Stratford Shoal. You will be set in which general direction?
N a. Northerly N b. Easterly N c. Southerly Y d. Westerly 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) 16619: The shoreline along Rocky Point should give a good radar return because __________.
N a. the lookout tower is marked with radar reflectors N b. of offshore exposed rocks N c. submerged reefs cause prominent breakers Y d. the shore is bluff and rocky