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.
87: 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. 0821, 21 April Y b. 0028, 21 April N c. 1830, 20 April N d. 1445, 20 April 97: The highest point on your towboat is 57 feet above the water, and the Memphis Gage reads +1.3 feet. What is the vertical clearance when you pass under the Memphis Highway Bridge in Memphis?
N a. 112.7 feet N b. 55.7 feet Y c. 54.6 feet N d. 51.8 feet 176: What is your 2118 position?
N a. LAT 36°56.6'N, LONG 76°01.0'W N b. LAT 36°57.0'N, LONG 76°01.5'W Y c. LAT 36°57.4'N, LONG 76°01.9'W N d. LAT 36°58.0'N, LONG 76°02.4'W 244: Your vessel is entering New London Harbor Channel. If there is no current, what should you steer per gyro compass to stay on the range?
N a. 006° N b. 357° N c. 354° Y d. 351° 251: You alter course from your 0045 position to head for Mattituck Breakwater Light "MI". If the visibility is 10 miles and you make good 9 knots, at what time will you lose sight of Saybrook Breakwater Light?
Y a. 0100 N b. 0123 N c. 0131 N d. The light is visible all the way to Mattituck Inlet 359: You are turning for 9 knots, a westerly wind is causing 3°
of leeway, and the current is 320°T at 1.2 knots. What true course should you steer to remain in the northern leg of York Spit Channel?
N a. 203°T N b. 197°T Y c. 194°T N d. 191°T 440: By 1015, visibility has increased to 5.0 miles and you can see Fishers Island. Fishers Island has __________.
Y a. sparsely wooded hills and is fringed with shoals to the south N b. sheer cliffs rising from the sea to a high, flat plateau N c. barren, rocky hills with prominent sandy beaches N d. low and sandy beaches with salt ponds and marsh grass 441: You get underway at 1030. The wind is out of the SSE and you estimate 3° leeway. What course should you steer per gyrocompass to make good a desired course of 075°T?
Y a. 080°pgc N b. 078°pgc N c. 076°pgc N d. 074°pgc 467: Determine the great circle initial course from LAT 29°46.0'S, LONG 30°26.0'E to LAT 31°52.0'S, LONG 115°22.0'E.
N a. 074°T N b. 113°T Y c. 117°T N d. 121°T 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 538: Determine the distance from LAT 23°24'S, LONG 13°54'E to LAT 23°24'S, LONG 42°48'W. by parallel sailing.
N a. 3119.3 miles Y b. 3122.2 miles N c. 3124.5 miles N d. 3126.6 miles 556: Your 0530 position is LAT 41°04.9'N, LONG 73°01.1'W. What is the course per standard magnetic compass to a position 1.0 mile south of Twenty Eight Foot Shoal "TE" buoy?
Y a. 099.5°psc N b. 096.0°psc N c. 092.5°psc N d. 082.0°psc 579: Which loran line of position will serve as a danger reading on the loran to keep you west of the submerged obstruction at LAT 37°24.2'N, LONG 76°03.7'W, after you leave York Spit Channel?
Y a. Not less than 9960-X-27246 N b. Not more than 9960-Y-41595 N c. Not less than 9960-Y-41595 N d. Not less than 9960-Z-58622 579: Which loran line of position will serve as a danger reading on the loran to keep you west of the submerged obstruction at LAT 37°24.2'N, LONG 76°03.7'W, after you leave York Spit Channel?
Y a. Not less than 9960-X-27246 N b. Not more than 9960-Y-41595 N c. Not less than 9960-Y-41595 N d. Not less than 9960-Z-58622 741: On 16 February , your 1845 ZT DR position is LAT 25°50.5'N, LONG 46°24.0'W. At that time you observe Polaris with a sextant altitude (hs) of 26°25.5'. The chronometer time of the sight is 09h 47m 30s and the chronometer error is 02m 16s fast. The index error is 2.5' off the arc, and the height of eye is 55.0 feet. What is your latitude by Polaris?
Y a. 25°38.0'N N b. 25°44.2'N N c. 26°00.1'N N d. 26°37.5'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 1081: On 14 Sept , your 1810 ZT DR position is LAT 27°12.0'S, LONG 71°10.0'E. You are on course 060°T at a speed of 15.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1822 running fix. NP-0011
N a. LAT 27°04.5'S, LONG 71°22.4'E N b. LAT 27°07.5'S, LONG 71°18.6'E N c. LAT 27°09.2'S, LONG 71°11.3'E Y d. LAT 27°11.0'S, LONG 71°14.5'E 1091: On 10 August , your 0430 ZT position is LAT 29°56.7'S, LONG 139°11.0'E. Your course is 321°T, speed 18.2 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0500 running fix. NP-0021
N a. LAT 29°46.0'S, LONG 138°54.0'E Y b. LAT 29°49.2'S, LONG 138°57.0'E N c. LAT 29°56.0'S, LONG 139°03.8'E N d. LAT 30°07.5'S, LONG 138°55.2'E 1247: At 0509, on 26 December, you pass under the Helena Highway Bridge (mile 661.7 AHP). What has been the average speed of the current since departing Memphis Harbor, McKellar Lake, if you have been making turns for 7.5 mph?
N a. 5.6 mph Y b. 4.4 mph N c. 2.1 mph N d. 1.8 mph 1260: On 16 March , your 0330 ZT DR position is LAT 22°36.0'S, LONG 76°16.0'E. You are on course 098°T at a speed of 16 knots. What will be the ZT of sunrise at your vessel?
N a. 0545 Y b. 0553 N c. 0600 N d. 0608 1290: You are at mile 230.0 AHP and see on the map a large rectangle outlined with a broken line . This indicates a __________.
N a. revetment N b. dredge material Y c. fleeting area N d. dike 1340: At 1300, 5 January, the river will be temporarily closed to navigation for six hours at mile 531.3 AHP due to repairs to a bridge. What minimum speed over the ground must you make from Natchez Gage in order not to be delayed?
N a. 5.7 mph Y b. 6.0 mph N c. 6.8 mph N d. 7.3 mph 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 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 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 1741: You have received orders to proceed to the Amoco Pipeline Co. (mile 253.6 AHP) above Baton Rouge. If your vessel is making turns for 9 mph with an estimated average current of 1.5 mph, what is your ETA at the Amoco docks?
N a. 2044, 25 Aug N b. 0214, 26 Aug N c. 0745, 26 Aug Y d. 0845, 26 Aug 1898: On 22 May , your 0437 DR position is LAT 25°18.5'N, LONG 51°18.0'W. You observe an unidentified star bearing 142°T at an observed altitude (Ho) of 23°10.2'. The chronometer reads 07h 40m 40s, and is 03m 24s fast. What star did you observe?
N a. Markab N b. Diphda N c. Sabik Y d. Fomalhaut 1902: On 22 April , your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 077°T at an observed altitude (Ho) of 18°58.7'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?
N a. Diphda N b. Betelgeuse N c. Gienah Y d. Arcturus 1956: At 1923, you increase speed to make good 9.2 mph. What is the first gage you will pass after your speed change?
N a. Cottonwood Point Y b. Caruthersville N c. Fulton N d. New Madrid 2112: At 0130, you obtain the following bearings:
Horton Point Lighthouse 078°T
Mattituck Breakwater Light tower 196°T
What were the course and speed made good between 0100 and 0130?
Y a. 246°T at 9.8 knots N b. 253°T at 9.4 knots N c. 259°T at 9.8 knots N d. 267°T at 9.4 knots 2208: What is the total length of the trip?
N a. 906.3 miles Y b. 922.3 miles N c. 1155.8 miles N d. 1187.3 miles 2662: You are on course 006°T, speed 16.6 knots. At 0516 you see a light bearing 008°T at a range of 10.2. If you change course at 0528 to leave the light abeam to port at 1.0 mile,
at what time will the light be abeam?
Y a. 0553 N b. 0556 N c. 0604 N d. 0607 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 3606: You are steering 154°pgc. The wind is southwest causing 4° leeway. The gyro error is 3°E, variation is 11°W and deviation is 7°E. What is the true course made good?
Y a. 153°T N b. 158°T N c. 161°T N d. 164°T 4007: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a gyro heading of 166°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 350° 122.5° - 110° 239.5° - 230°
030.5° - 020° 152.0° - 140° 269.0° - 260°
061.5° - 050° 181.0° - 170° 298.0° - 290°
092.0° - 080° 210.0° - 200° 327.5° - 320°
Y a. 1.0°W N b. 1.0°E N c. 0.5°W N d. 0.5°E 11408: At 1930 your GPS position is LAT 41°08.6'N, LONG 72°41.6'W. At 2024 your position is LAT 41°00.5'N, LONG 72°49.5'W. What is your true course and speed made good?
N a. 219° at 10.1 knots Y b. 216° at 11.2 knots N c. 039° at 9.9 knots N d. 036° at 11.1 knots 11707: 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 turning for 7.8 knots, the current is 139°T at 1.3 knots, and a northwesterly wind is causing 3° of leeway?
N a. 290.0°psc Y b. 286.0°psc N c. 283.5°psc N d. 280.5°psc 11905: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive one mile due south of Block Island Southeast Point Light, if you are turning for 8.6 knots, the current is 130° at 1.2 knots, and a northerly wind causes 3° of leeway?
Y a. 061°T N b. 064°T N c. 067°T N d. 070°T 13303: You are considering anchoring approximately three miles northeast of Chesapeake Light. After examining the chart you decide not to because of the __________.
N a. large number of wrecks N b. coral being designated as a special protected area Y c. danger of unexploded mines N d. area being designated as a National Marine Sanctuary 14205: You are off the coast of Mexico and are taking a time tick for 1600. At approximately 1554, 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 03h 59m 56s. When compared to the chronometer, the comparing watch reads 04h 01m 22s, and the chronometer reads 04h 02m 11s. What is the chronometer error?
N a. 0m 04s slow N b. 2m 15s slow Y c. 0m 45s fast N d. 1m 26s fast 14404: You are underway and proceeding in an easterly direction on the Columbia River. You position your vessel in the middle of the channel and bring Government Island Lower Range in line over your bow. What should your fathometer read at this position, if the staff gauge at Portland reads 10.0 feet?
Y a. 15 feet N b. 24 feet N c. 28 feet N d. 31 feet 15025: What is the mile point of the Arkansas City Gage?
Y a. 554.1 AHP N b. 556.8 AHP N c. 560.0 AHP N d. 562.8 AHP 15119: What is the height above water of Davis Creek Channel Light "1"?
N a. 6 feet (1.8 meters) Y b. 15 feet (4.6 meters) N c. 17 feet (5.2 meters) N d. 24 feet (7.3 meters) 15220: If the Old Point Comfort main light was inoperative what emergency light would be shown?
N a. Flashing yellow N b. Alternating red and white Y c. Light of reduced intensity N d. Strobe light 15316: What speed have you made good from 1710 to 1810?
N a. 4.2 knots N b. 4.9 knots N c. 5.5 knots Y d. 6.3 knots 15645: You round Montauk Point and steer to make good 206°T. Speed is increased to 13.0 knots. The current, if any, is unknown. The visibility has improved and is estimated to be 5 miles. At 2144 Montauk Point Light bears 273°T. At 2202 the same light bears 320°T. Which statement concerning your 2202 running fix is TRUE?
N a. You are inside the lobster pot area. Y b. The fathometer reads about 12 fathoms. N c. You are inside of the 90 foot curve. N d. You are outside the boundary of the Territorial Sea and Contiguous Zone. 15669: The area between Block Island and Montauk Point that is bounded by dashed magenta lines is a __________.
N a. naval exercise area N b. fish trap area Y c. submerged cable area N d. restricted navigation area 15915: At 0925, you obtain the following radar information:
Falkner Island Light bearing 252° true @ 1.65 nm
If you correct for a current setting 215°T at 0.5 knot,
what course will you steer from the 0925 position to arrive at a position 0.5 mile south of Long Sand Shoal West End Horn Buoy "W"?
Y a. 089°T N b. 093°T N c. 096°T N d. 102°T 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 16440: What course per gyrocompass would you need to steer from the anchorage to York Spit Channel buoy "29"?
Y a. 172° pgc N b. 175° pgc N c. 178° pgc N d. 181° pgc 16608: At 2142, you take the following bearings:
Stratford Point Light 331°T
Stratford Shoal Middle Ground Light 280°T
Old Field Point Light 223°T
What is your 2142 position?
Y a. LAT 41°03.0'N, LONG 73°01.7'W N b. LAT 41°03.1'N, LONG 73°02.1'W N c. LAT 41°03.1'N, LONG 73°01.3'W N d. LAT 41°03.3'N, LONG 73°01.9'W 16615: At 0112, the radar range to Branford Reef Light is 2.9 miles. At 0125, the range is 3.6 miles. What is the position of your 0125 running fix if you are steering 124°T at 12 knots?
Y a. LAT 41°09.7'N, LONG 72°48.1'W N b. LAT 41°09.7'N, LONG 72°48.7'W N c. LAT 41°09.8'N, LONG 72°47.2'W N d. LAT 41°10.2'N, LONG 72°47.7'W 16740: At 2245 visibility improves and Montauk Point Light bears 355°pgc. At 2314 Montauk Point Light bears 331°pgc, and at 2329 the light bears 311°pgc. Based on your 2329 running fix which statement is TRUE?
N a. You are shoreward of the 90 foot curve. N b. Your fathometer reads about 136 feet. Y c. You are being set to the left of the track. N d. You allowed too much leeway for the easterly winds.