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.
105: On 19 January , your 0300 zone time DR position is LAT 22°13'N, LONG 40°19'W. You are on course 297°T at a speed of 17 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0545 running fix?
Y a. LAT 22°29.0'N, LONG 41°06.5'W N b. LAT 22°30.3'N, LONG 41°00.2'W N c. LAT 22°31.1'N, LONG 42°58.6'W N d. LAT 22°33.0'N, LONG 42°55.9'W 146: On which river is Dover, KY located?
N a. Mississippi N b. Tennessee Y c. Ohio N d. Missouri 182: What course should you steer using the standard magnetic compass (psc) to make good the course of 192°pgc?
N a. 188°psc Y b. 203°psc N c. 205°psc N d. 208°psc 231: From your 2123 position, you are approximately 42 miles from Crisfield, MD. If you are making good a speed of 13 knots, at what time should you arrive at Crisfield, MD?
N a. 0148 N b. 0112 Y c. 0037 N d. 2359 245: On chart 12354, the datum from which heights of objects are taken is __________.
N a. lowest low water N b. mean low water Y c. mean high water N d. mean lower low water 261: You must arrive at your final destination by 0800. The distance from your 0300 position to the final destination is 40.5 miles. What minimum speed must be made good to arrive on time?
N a. 9.6 knots N b. 9.3 knots N c. 8.5 knots Y d. 8.1 knots 282: From your 1752 position, you steer 307°pgc at 9 knots. At 1805, you obtain the visual bearings. What are the latitude and longitude of your 1805 position? Old Pt. Comfort Light 232°pgc. Chesapeake Bay Tunnel North Light 130°pgc.
Y a. LAT 37°05.9'N, LONG 76°08.0'W N b. LAT 37°06.0'N, LONG 76°08.4'W N c. LAT 37°05.9'N, LONG 76°07.7'W N d. LAT 37°06.1'N, LONG 76°07.5'W 357: If the visibility is 5 miles and you are in the red sector, at what distance off should you sight Cape Henry Light?
Y a. 09 miles N b. 11 miles N c. 13 miles N d. 15 miles 372: If you change course at 0610, what is the course to steer to a point where Little Gull Island Light bears 180°T at 0.7 mile (Point "A")?
N a. 084°pgc Y b. 080°pgc N c. 076°pgc N d. 072°pgc 424: From your 0530 position, you set a course of 271°psc with an engine speed of 9 knots. At 0645, Cornfield Safe-Water Buoy is abeam to starboard. What speed have you averaged since 0530?
N a. 9.5 knots N b. 9.0 knots Y c. 8.6 knots N d. 7.5 knots 442: Shortly after getting underway, you sight Stonington Outer Breakwater Light in line with Stonington Inner Breakwater Light bearing 000° per gyrocompass. Which statement is TRUE?
N a. The deviation is 2°W N b. The variation is 2°E. N c. The compass error is 16°W. Y d. The gyro error is 2.5°W 469: Determine the great circle initial course from LAT 37°12.6'S, LONG 73°58.0'W to LAT 10°33.0'S, LONG 142°08.0'E.
Y a. 223°T N b. 253°T N c. 287°T N d. 317°T 496: At 0815, you change course to 079°T and head for the entrance of Great Salt Pond on Block Island. To compensate for a northerly wind, you estimate a 5° leeway is necessary. What course should you steer per gyrocompass to make good 079°T?
Y a. 071°pgc N b. 074°pgc N c. 076°pgc N d. 079°pgc 806: On 15 November , your 0913 zone time fix gives you a position of LAT 22°30.0'N, LONG 68°28.0'W. Your vessel is on course 164°T, and your speed is 13.5 knots. Local apparent noon (LAN) occurs at 1118 zone time at which time meridian altitude of the Sun's lower limb is observed. The observed altitude (Ho) for this sight is 49°46.0'. What is the calculated latitude at LAN?
N a. 21°36.1'N N b. 21°37.7'N Y c. 21°39.3'N N d. 21°40.9'N 836: On 16 June , in DR position LAT 50°57.0'S, LONG 53°03.9'W (ZD+4), you take an ex-meridian observation of Acrux at lower transit. The chronometer time of the sight is 10h 08m 18s, and the chronometer error is 02m 12s fast. The sextant altitude (hs) is 23°49.0'. The index error is 1.1' off the arc, and your height of eye is 26 feet. What is the latitude at meridian transit?
Y a. 50°41.2'S N b. 51°02.2'S N c. 51°33.0'S N d. 51°41.2'S 840: On 29 October , in DR position LAT 41°12.0'N, LONG 50°18.9'W, you take an ex-meridian observation of the Sun's lower limb, near upper transit. The chronometer time of the sight is 03h 21m 12s, and the chronometer error is 01m 50s slow. The sextant altitude (hs) is 34°54.2'. The index error is 2.0' on the arc, and your height of eye is 45 feet. What is the latitude at meridian transit?
N a. 41°12.0'N Y b. 41°16.0'N N c. 41°20.2'N N d. 41°23.6'N 1021: On 30 March , your 0145 DR position is LAT 29°30'S, LONG 122°45'E. You are on course 055°T at a speed of 22 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix.
N a. LAT 28°24.6'S, LONG 124°21.4'E Y b. LAT 28°39.9'S, LONG 124°18.6'E N c. LAT 28°41.5'S, LONG 124°41.5'E N d. LAT 29°20.1'S, LONG 123°41.0'E 1103: On 25 August , your 0300 zone time DR position is LAT 21°28.0'N, LONG 167°48.0'E. You are on course 248°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0032
N a. LAT 20°52.4'N, LONG 167°32.1'E Y b. LAT 20°57.1'N, LONG 167°01.0'E N c. LAT 20°59.5'N, LONG 166°54.8'E N d. LAT 21°06.0'N, LONG 167°10.9'E 1233: What is the distance from Greenville, MS, to Tiptonville, TN on the Mississippi River System?
N a. 95 miles N b. 136 miles Y c. 341 miles N d. 520 miles 1270: At 0500 zone time, on 21 August , your DR position is LAT 47°00'N, LONG 125°15'W. You are steering 000°T at a speed of 9.8 knots. What is the zone time of sunrise?
Y a. 0525 N b. 0529 N c. 0531 N d. 0535 1462: On 17 June , your 0815 zone time DR position is LAT 25°27.0'N, LONG 47°16.0'W. At that time, you observe the Sun bearing 079.5°psc. The chronometer reads 11h 15m 03s, and the chronometer error is 01m 15s fast. The variation is 3°E. What is the deviation of the standard magnetic compass?
N a. 0.7°W Y b. 3.5°W N c. 3.7°E N d. 2.3°E 1538: At 1032 on 24 June, you pass Carolina Landing Light(508.8 AHP). What has been the average current since 2350, 23 June, if you have been making turns for 9.0 mph?
N a. 8.5 mph N b. 5.7 mph N c. 1.5 mph Y d. 0.5 mph 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 1895: On 22 June , your 0424 DR position is LAT 26°18.5'N, LONG 124°18.2'W. You observe an unidentified star bearing 195°T at an observed altitude (Ho) of 03°30.7'. The chronometer reads 00h 23m 24s, and is 01m 32s slow. What star did you observe?
Y a. Peacock N b. Schedar N c. Ankaa N d. Alioth 1927: At 1554, on 25 May, you pass Huntington Point Light (mile 555.2 AHP). What was your average speed since departing Amoco Pipeline Co. DockS (253.6 AHP)?
N a. 6.9 mph Y b. 6.2 mph N c. 4.8 mph N d. 4.3 mph 1927: At 1554, on 25 May, you pass Huntington Point Light (mile 555.2 AHP). What was your average speed since departing Amoco Pipeline Co. DockS (253.6 AHP)?
N a. 6.9 mph Y b. 6.2 mph N c. 4.8 mph N d. 4.3 mph 2017: On 2 February , your 0400 zone time DR position is LAT 24°14.0'N, LONG 163°28.0'W. You are on course 322°T at a speed of 22 knots. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
Y a. Saturn, Antares, Rasalhague N b. Jupiter, Saturn, Polaris N c. Saturn, Polaris, Zubenelgenubi N d. Jupiter, Spica, Denebola 2170: On 22 July , at 0720 ZT, in DR position LAT 20°38.2'N, LONG 87°16.0'W, you observe the Moon's lower limb. The sextant altitude (hs) is 38°32.6, and the chronometer reads 01h 18m 14s. The chronometer is 01m 28s slow. The index error is 3.1' off the arc, and the height of eye is 68 feet. What is the azimuth (Zn) and intercept (a) of this sight from the assumed position?
N a. Zn 291.4°, a 5.2' A N b. Zn 111.4°, a 8.7' A Y c. Zn 248.6°, a 5.0' T N d. Zn 068.6°, a 6.5' T 2210: The low water reference plane (LWRP) for Bayou Sara is 5.25 feet. If the Bayou Sara Gage reads -0.5 feet, what is the water level in relation to the low water reference plane?
N a. 4.75 feet above the plane N b. 5.75 feet above the plane Y c. 5.75 feet below the plane N d. 4.75 feet below the plane 2677: You sight a light 9° on your starboard bow at a distance of 21 miles. Assuming you make good your course, what will be your distance off the light when abeam?
Y a. 3.3 miles N b. 3.7 miles N c. 4.0 miles N d. 4.3 miles 2686: While on a course of 034°pgc, a light bears 8° on the port bow at a distance of 8.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to port?
N a. 035°pgc Y b. 043°pgc N c. 051°pgc N d. 059°pgc 2777: The Helena Gage reads 2.3 feet. The high point on your towboat is 26 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 76.0 feet N b. 84.2 feet N c. 89.5 feet Y d. 90.7 feet 3076: If the speed necessary for reaching port at a designated time is 16.4 knots and the pitch of the propeller is 23.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 6% positive slip?
N a. 66 Y b. 74 N c. 82 N d. 90 3077: If the speed necessary for reaching port at a designated time is 23.7 knots and the pitch of the propeller is 20.8 feet, how many revolutions per minute will the shaft have to turn, assuming a 7% negative slip?
Y a. 108 N b. 112 N c. 116 N d. 124 3764: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 064°T, and the variation is 17°W. If the heading of your vessel at the time of the sighting is 094° per standard magnetic compass, what is the correct deviation?
N a. 4°E N b. 4°W N c. 13°E Y d. 13°W 3767: You are on course 251°pgc and 241° per magnetic compass, when you observe a range in line bearing 192°pgc. The chart indicates that the range is in line on a bearing of 194°T. The variation is 16°E. What is the deviation of the magnetic compass?
N a. 2°E N b. 2°W Y c. 4°W N d. 10°W 4015: You swung ship and compared the magnetic compass against the gyro compass to find deviation. Gyro error is 2°W. The variation is 8°W. Find the deviation on a true heading of 319°.
HEADING HEADING HEADING
PSC PGC PSC PGC PSC PGC
358.5° - 354° 122.5° - 114° 239.5° - 234°
030.5° - 024° 152.0° - 144° 269.0° - 264°
061.5° - 054° 181.0° - 174° 298.0° - 294°
092.0° - 084° 210.0° - 204° 327.5° - 324°
N a. 0.5°E N b. 1.0°W Y c. 2.5°E N d. 2.5°W 11405: At 2125 your GPS position is LAT 41°05.7'N, LONG 72°46.5'W. At 2208 your position is LAT 41°03.3'N, LONG 72°37.9'W. What was your course made good by standard magnetic compass?
Y a. 123°psc N b. 287°psc N c. 303°psc N d. 326°psc 11500: At 2016 your GPS position is LAT 41°07.6'N, LONG 71°37.8'W. At 2128 your GPS position is LAT 41°00.4'N, LONG 71°29.4'W. What was the speed made good between the two positions?
N a. 11.9 knots N b. 10.2 knots Y c. 8.0 knots N d. 7.4 knots 11700: What is the true heading to steer outbound in Thimble Shoal Channel if your engines are turning for 8.0 knots, the current is 050°T at 1.0 knot and a northerly wind causes 3° of leeway?
Y a. 111°T N b. 104°T N c. 101°T N d. 098°T 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 11909: Your position is 3 miles due east of Montauk Point Light. What is the true course to steer to arrive one mile due south of Block Island Southeast Point Light, if you are turning for 6.8 knots, the current is 330° at 1.2 knots, and a southerly wind causes 3° of leeway?
N a. 081°T Y b. 084°T N c. 087°T N d. 090°T 12502: You are on course 262° per standard magnetic compass when you take the following bearings: Cape Henry Light 252°psc Cape Charles Light 003°psc Chesapeake Light 131°psc What is your position?
Y a. LAT 36°59.0'N, LONG 75°52.9'W N b. LAT 36°58.1'N, LONG 75°52.6'W N c. LAT 36°57.9'N, LONG 75°53.2'W N d. LAT 36°58.6'N, LONG 75°52.2'W 12906: At 0919 you are in Chesapeake Channel between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel. What is your ETA between York River Entrance Channel Buoys "17" and "18" if you are making 11.3 knots?
N a. 1034 N b. 1039 Y c. 1044 N d. 1049 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 15114: Your 1900 position is LAT 37°12.9'N, LONG 76°13.5'W. You change course to 317°pgc and slow to 8.0 knots. What is the course per standard magnetic compass?
N a. 331°psc Y b. 329°psc N c. 311°psc N d. 309°psc 15144: At 2310 Buoy "MP" bears 305° true with a radar range of 2.5 miles. From this position you change course to 005° true. Without any set and drift, what would be your predicted distance off Southwest Ledge Buoy "2" when it is on your starboard beam?
N a. 0.9 mile N b. 1.1 miles Y c. 1.5 miles N d. 1.9 miles 15161: From your 1815 position, you want to make good course 263°
T. Your engines are turning RPMs for 12 knots. The current is 050°T at 1.9 knots. Adjusting your course for set and drift, at what time should you expect to enter the red sector of Cape Henry Light?
N a. 1851 N b. 1857 Y c. 1904 N d. 1911 15258: Which structure should you look for while trying to locate Stratford Point Light?
Y a. White conical tower with a brown band midway of height N b. White octagonal house on a cylindrical pier N c. Conical tower, upper half white, lower half brown N d. Black skeleton tower on a granite dwelling 15544: At 2310 your position is LAT 41°05.5'N, LONG 72°33.7'W and you change course to make good 068°T. A radar speed check using Twenty Eight Foot Shoal Buoy indicates your speed over the ground is 13.6 knots. At 2325 Horton Point Light bears 129°T. At 2341 the same light bears 194°T. What is the position of your 2341 running fix?
N a. LAT 41°07.9'N, LONG 72°25.9'W N b. LAT 41°08.3'N, LONG 72°25.8'W Y c. LAT 41°08.5'N, LONG 72°25.6'W N d. LAT 41°08.8'N, LONG 72°25.2'W 15746: Which nautical chart would you use to navigate into New London, CT?
N a. 13209 N b. 13211 Y c. 13212 N d. 13214 16407: At 0227, you are on course 087°T at 10 knots. What course per standard magnetic compass should you steer to make good your true course?
N a. 099°psc N b. 102°psc Y c. 105°psc N d. 109°psc 16708: At 0520 you are on course 243°pgc at 12 knots. What is the course per standard magnetic compass?
Y a. 263°psc N b. 258°psc N c. 233°psc N d. 227°psc 16738: At 2212 your position is LAT 40° 51'N, LONG 71° 53.5'W.
What is the course to steer, per gyrocompass from your 2212 position, to leave Montauk Point Buoy "MP" abeam to port at 1 mile if easterly winds are causing 3° of leeway?
N a. 027° pgc N b. 030° pgc N c. 032° pgc Y d. 035° pgc 16841: At 0907 you change course to 224°T, and your speed is now 13.0 knots. At 0939 Chesapeake Light is bearing 168°T at a distance of 7.1 miles, and Cape Henry Light is bearing 246°T. What were the set and drift since 0907?
N a. 326°T at 0.7 knot N b. 326°T at 1.4 knots Y c. 146°T at 1.4 knots N d. 146°T at 0.7 knots