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.
80: 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. 106.1 feet N b. 79.5 feet Y c. 64.2 feet N d. 56.0 feet 80: 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. 106.1 feet N b. 79.5 feet Y c. 64.2 feet N d. 56.0 feet 89: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
N a. Army Corps. of Engineers Navigation Chart N b. U.S.C.G. Light List Y c. U.S.C.G. Local Notice to Mariners N d. List of Buoys and Daymarks 118: Your company wants to know at what time you will be arriving at the fleeting area at Sycamore Chute Light (mile 740.3 AHP) in Memphis, TN. You are making turns for 9.0 mph and you estimate the average current at 2.2 mph. Figuring the distance and time from Hole in the Wall Lt. (mile 373.4 AHP), what is your ETA at Sycamore Chute Lt.?
N a. 0557, April 19th N b. 1045, April 19th Y c. 1242, April 19th N d. 1733, April 19th 121: As you approach Casting Yard Dock Lt. (mile 265.4 AHP) you notice on the map a circle with 2 black sectors. This symbol indicates a __________.
N a. lock N b. warning sign N c. mooring buoy Y d. river gage 153: What is the minimum maintained depth of the channel from Cairo to Baton Rouge during low water?
Y a. 9 feet N b. 12 feet N c. 15 feet N d. 18 feet 298: You have just passed York River Entrance Channel Lighted Buoys "13" and "14". The chart shows a light approximately 1.0 mile off your port beam with a light characteristic "Fl 6 sec". What is the name of this light?
Y a. York Spit Light N b. New Point Comfort Shoal Light N c. Mobjack Bay Entrance Light N d. York River Entrance Channel Light "1" 439: At 0337, fog closes in and you anchor under the following radar ranges and bearing:
South tip of Watch Hill Point 3.0 miles
East point of Fishers Island 1.4 miles
Latimer Reef Light 331°T
What is the approximate depth of water at your anchorage?
N a. 135 feet (40.9 meters) N b. 120 feet (36.4 meters) Y c. 100 feet (30.3 meters) N d. 83 feet (25.2 meters) 444: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1220 Y b. 1215 N c. 1208 N d. 1157 514: The shoreline along Rocky Point should give a good radar return because __________.
Y a. the shore is bluff and rocky N b. of offshore exposed rocks N c. submerged reefs cause prominent breakers N d. the lookout tower is marked with radar reflectors 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 599: Which town is located at mile 663.5 AHP?
Y a. Helena N b. Friers Point N c. St. Francis N d. Rodney 735: On 22 August , your 1852 zone time DR position is LONG 155°54.0'E. At that time you observe Polaris with a sextant altitude (hs) of 27°36.9'. The chronometer time of the sight is 08h 54m 06s, and the chronometer error is 02m 20s fast. The index error is 3.6' off the arc, and the height of eye is 61.5 feet. What is your latitude by Polaris?
N a. 27°05.5'N N b. 27°31.0'N Y c. 28°05.9'N N d. 28°09.5'N 812: On 28 July , your 0800 zone time (ZT) fix gives you a position of LAT 25°16.0'N, LONG 71°19.0'W. Your vessel is on course 026°T, and your speed is 17.5 knots. Local apparent noon (LAN) occurs at 1150 ZT, at which time a meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 82°28.7'. What is the latitude at 1200 ZT?
N a. 26°25.0'N Y b. 26°27.6'N N c. 26°29.8'N N d. 26°32.0'N 1126: What are the dotted lines crossing at mile 529.7 AHP?
Y a. submarine cables N b. power cables N c. gated dams N d. workboat crossings 1214: It is 25 February and you are keeping zone time +4. You are on course 283°T, speed 22 knots. Your 0900 DR position is LAT 29°10.3'N, LONG 72°04.9'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 08m 56s Y b. 13h 08m 02s N c. 12h 41m 36s N d. 12h 07m 56s 1392: On 3 February , your 0550 zone time DR position is LAT 26°16.0'N, LONG 112°05.0'W. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
N a. Spica, Antares, Saturn N b. Vega, Antares, Dubhe N c. Venus, Regulus, Vega Y d. Spica, Kochab, Rasalhague 1675: On 28 November , your vessel's 0652 DR position is LAT 37°30'N, LONG 124°12'W, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 103° per standard magnetic compass. Variation in the area is 16.3°E. The chronometer reads 02h 54m 18s and is 02m 06s fast. What is the deviation of the compass?
Y a. 2.5°W N b. 3.0°W N c. 2.0°E N d. 3.0°E 1688: As you approach Ashland Light (mile 378.1 AHP), which type of daymark would you see on the light structure?
N a. Green square N b. Green triangle N c. Red diamond Y d. Red triangle 1727: You pass under the Natchez bridge (mile 363.3 AHP) at 1300, on 27 March, and estimate the current to be 3.3 mph. What is your ETA at St. Louis if you continue to turn for 7.5 mph?
N a. 0617, 4 April Y b. 0316, 4 April N c. 1153, 30 March N d. 1253, 31 April 1751: At 1118, on 24 May, you pass Natchez Gage and estimate the current will average 3.0 mph for the remainder of the time on the Mississippi River. What is your ETA at Cairo, IL if you continue to turn for 10 mph?
N a. 0840, 26 May N b. 2218, 26 May Y c. 2339, 27 May N d. 0339, 28 May 1864: At 0520 zone time, on 17 March , while taking stars for a morning fix, you observe an unidentified star bearing 050°T, at an observed altitude (Ho) of 45°00.0'. Your DR position at the time of the sight is LAT 27°23.0'N, LONG 39°42.0° W. The chronometer time of the sight is 08h 22m 15s, and the chronometer error is 01m 45s fast. Your vessel is steaming on a course of 300°T at a speed of 18 knots. What star did you observe?
N a. Altair N b. Alkaid N c. Arcturus Y d. Deneb 2001: On 3 February , your 0451 zone time DR position is LAT 24°15.0'S, LONG 124°24.0'W. Considering their magnitude, azimuth and altitude, which group includes the three bodies best suited for a fix at star time?
Y a. Alphard, Denebola, Acrux N b. Spica, Venus, Procyon N c. Jupiter, Dubhe, Antares N d. Mars, Arcturus, Spica 2011: On 3 February , your 0547 zone time DR position is LAT 24°18.5'N, LONG 167°25.0'E. Considering their magnitude,
azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
Y a. Regulus, Deneb, Antares N b. Altair, Saturn, Regulus N c. Arcturus, Kochab, Venus N d. Jupiter, Denebola, Regulus 2026: On 10 June , your 1712 zone time DR position is LAT 25°10.0'S, LONG 06°58.0'E. You are on course 213°T at a speed of 9.0 knots. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
N a. Procyon, Antares, Sirius N b. Sirius, Procyon, Regulus N c. Acrux, Canopus, Regulus Y d. Acrux, Procyon, Arcturus 2082: From your 0100 position, you change course to 258° per standard magnetic compass. Your engine speed is 10.0 knots. A short time later, your fathometer reads 51 feet (15.5 meters) under the keel. What is the water depth?
N a. 42.5 feet (12.9 meters) N b. 51.0 feet (15.5 meters) Y c. 59.5 feet (18.0 meters) N d. 60.4 feet (18.4 meters) 2185: At 1000 ZT, on 21 October , your DR position is LAT 29°00'N, LONG 134°40'E. Determine the computed altitude (Hc) of the Sun for the assumed position (AP) nearest to the above given latitude and longitude, given a chronometer time of 01h 00m 00s.
N a. Hc 42°30.6' N b. Hc 42°32.1' N c. Hc 42°34.2' Y d. Hc 42°35.7' 2214: Which of the following statements regarding aids to navigation shown in the 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. Y b. Buoys should always be given as wide a berth in passing as possible. N c. Buoy positions as shown on the chart are exact. N d. Lights and daymarks are always shown in their exact location. 2535: What is the mile point of Hickman, KY Gage?
N a. 846.4 AHP N b. 889.0 AHP Y c. 922.0 AHP N d. 937.2 AHP 2594: What will be the current at Port Jefferson entrance at 0130 on December 5, 1983?
N a. 1.4 knots, flood N b. 1.4 knots, ebb N c. 0.8 knot, flood Y d. 0.8 knot, ebb 2690: While on a course of 066°pgc, a light bears 13° on the port bow at a distance of 12.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to port?
N a. 067°pgc Y b. 072°pgc N c. 079°pgc N d. 085°pgc 2778: What company does NOT have a marine facility along the river bank in Helena (mile 658 to 665 AHP)?
N a. Texas Eastern Pipeline Co. N b. Helena Port Terminal, Inc. N c. Arkansas Power & Light Co. Y d. Helena Grain Co. 3099: The propellers on your twin screw vessel have a pitch of 16'04". What is the distance in a day's run if the average RPM is 94, and you estimate 7% positive slip?
Y a. 338.3 miles N b. 389.3 miles N c. 676.6 miles N d. 778.6 miles 3269: Your vessel arrives in port with sufficient fuel to steam 812 miles at 15 knots. If you are unable to take on bunkers, at what speed must you proceed to reach your next port, 928 miles distant?
N a. 13.6 knots Y b. 14.0 knots N c. 15.3 knots N d. 15.7 knots 10106: What is the course per standard magnetic compass from Chesapeake Light to North Chesapeake Entrance Lighted Whistle Buoy NCA?
N a. 316°psc Y b. 321°psc N c. 323°psc N d. 326°psc 10306: You are 3 miles due east of Montauk Point Light. What is the course per standard magnetic compass to LAT 41°00.0'N, LONG 71°40.0'W?
N a. 145.5°psc Y b. 142.5°psc N c. 138.5°psc N d. 127.0°psc 11101: Great Salt Pond on Block Island is __________.
Y a. entered through a dredged cut N b. not accessible in easterly gales N c. available for vessels up to a maximum draft of 8 feet (2.4m) N d. not affected by the tide 11300: At 1256 your GPS position is LAT 36°57.0'N, LONG 75°41.0'W. At 1336 your position is LAT 37°07.5'N, LONG 75°39.1'W. What was the speed made good between the fixes?
N a. 14.6 knots N b. 15.2 knots Y c. 16.0 knots N d. 18.6 knots 12602: You are on course 087° per standard magnetic compass (psc) when you take the following bearings: Falkner Island Light - 022.0°psc Horton Point Light - 111.5°psc Mt. Sinai Breakwater Light - 254.0°psc What is your position?
N a. LAT 41°13.6'N, LONG 72°46.6'W N b. LAT 41°10.5'N, LONG 72°40.5'W N c. LAT 41°07.0'N, LONG 72°44.5'W Y d. LAT 41°06.8'N, LONG 72°40.7'W 13300: The soundings on this chart are measured in __________.
Y a. feet N b. yards N c. fathoms N d. meters 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 15064: At 0844, the range to the north end of Falkner Island is 2.0 miles and the left tangent bearing is 102°T. If the height of the tide is +1.0 foot, what is the approximate depth of the water under the keel?
N a. 14 ft (4.2 meters) Y b. 19 ft (5.8 meters) N c. 22 ft (6.7 meters) N d. 29 ft (8.8 meters) 15358: At 0507, Stratford Shoal Middle Ground Light bears 208°pgc. What is the position of your 0507 running fix?
N a. LAT 41°04.8'N, LONG 73°05.0'W N b. LAT 41°04.9'N, LONG 73°04.8'W Y c. LAT 41°05.1'N, LONG 73°05.1'W N d. LAT 41°05.3'N, LONG 73°04.8'W 15407: At 1430, your position is LAT 37°12.8'N, LONG 76°17.7'W. At this time, you come left and steer 045°T. This course will lead you through a channel bordered by yellow buoys. The dashed magenta lines between the buoys mark __________.
N a. York River Entrance Channel N b. New Point Comfort shoal area N c. the piloting channel for Mobjack Bay Y d. the limits of fish trap areas 15567: Point Judith Harbor of Refuge __________.
N a. is used mostly by towing vessels N b. has a maximum depth of 14 feet (4.3 meters) at MHW N c. West Gap has a controlling depth of 24 feet Y d. is entered through the East Gap or the West Gap 15824: You pass Red River Gage at 2015 on 16 April and estimate the current will average 3.5 mph for the remainder of the time on the Mississippi River. What is your ETA at the mouth of the Ohio River if you continue to turn for 10 mph?
N a. 1445, 20 April N b. 1830, 20 April Y c. 0028, 21 April N d. 0821, 21 April 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. 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. 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. 16258: What is the course to steer per standard magnetic compass from the anchorage to point A, if easterly winds are causing 3° of leeway?
N a. 187° Y b. 191° N c. 194° N d. 197°