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.
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 321: At 2200, you are in position LAT 36°57.5'N, LONG 76°02.5'W. You intend to travel up the Thimble Shoals auxiliary Channel to Hampton Roads. According to the Coast Pilot, what is the depth of the auxiliary channel on either side of the main channel?
N a. 45 feet (13.7 meters) N b. 36 feet (11.0 meters) Y c. 32 feet (9.8 meters) N d. 28 feet (8.5 meters) 352: What is the approximate distance to New Bedford, MA, from your 0530 DR position, if your 0352 position was 7 miles from Bridgeport, CT?
N a. 122 miles N b. 115 miles Y c. 104 miles N d. 95 miles 420: At 0930, your position is LAT 41°16.5'N, LONG 71°41.4'W, and you are turning for 7 knots. Allowing 3° leeway for southerly winds and estimating the current as 035° at 0.3 knot, what is the course to steer (pgc) to point "B"?
Y a. 096°pgc N b. 094°pgc N c. 091°pgc N d. 089°pgc 518: Point Judith Harbor of Refuge __________.
N a. is used mostly by towing vessels N b. has a maximum depth of 14 feet at MHW Y c. is entered through the East Gap or the West Gap N d. is easily accessible in heavy southerly seas 544: From your 0600 position, what is the course per gyrocompass to leave Watch Hill Light abeam to starboard at 2.0 miles if a southerly wind is producing 3° of leeway?
N a. 262°pgc N b. 258°pgc N c. 256°pgc Y d. 252°pgc 597: Which daymark will you see as you approach Natchez Beam Lt. (mile 364.8 AHP)?
N a. Red diamond N b. White square N c. Green square Y d. Red triangle 626: You are on a voyage from St. John, Canada, to Galveston, TX. The distance is 2280 miles, and the speed of advance is 15.0 knots. You estimate 16.5 hours for bunkering enroute at Ft. Lauderdale, FL. If you sailed at 1642 hours (ZD +4), 27 February , what was your ETA (ZD +6) at Galveston?
Y a. 1512, 6 March N b. 0812, 6 March N c. 0712, 6 March N d. 2312, 5 March 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 750: On 28 October , at 1754 ZT, your vessel's DR position is LAT 28°30'N, LONG 63°24'W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28°42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?
N a. 28°25.2'N N b. 28°30.6'N Y c. 28°34.9'N N d. 28°41.3'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 1079: On 12 Dec. , your 1830 ZT DR position is LAT 24°16.0'S, LONG 41°18.0'W. You are on course 235°T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 1930 running fix. NP-0009
N a. LAT 24°12.5'S, LONG 41°10.9'W Y b. LAT 24°16.9'S, LONG 41°18.2'W N c. LAT 24°25.2'S, LONG 41°39.9'W N d. LAT 27°46.9'S, LONG 41°31.2'W 1104: On 19 November , your 0200 zone time DR position is LAT 20°29.0'N, LONG 150°21.3'E. You are on course 136°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0033
N a. LAT 19°30.1'N, LONG 151°06.0'E N b. LAT 19°31.7'N, LONG 151°04.9'E Y c. LAT 19°33.0'N, LONG 151°10.0'E N d. LAT 19°35.8'N, LONG 151°13.6'E 1105: On 28 May , your 0200 DR position is LAT 19°16.5'S , LONG 119°24.0'W. You are on course 107°T at a speed of 18 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0600 running fix. NP-0034
Y a. LAT 19°43.0'S, LONG 117°54.0'W N b. LAT 19°48.2'S, LONG 118°04.5'W N c. LAT 20°07.5'S, LONG 117°32.0'W N d. LAT 20°17.1'S, LONG 118°06.0'W 1145: 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?
N a. 75.4 feet N b. 66.4 feet N c. 53.8 feet Y d. 46.4 feet 1192: On 3 October , your 0830 ZT position is LAT 26°15.0'S, LONG 73°16.0'E. Your vessel is on course 280°T at a speed of 19.0 knots. What is the ZT of local apparent noon (LAN)?
N a. 1151 N b. 1154 N c. 1158 Y d. 1201 1203: You are keeping ZD +4 on your vessel. On 21 June ,
at 0906 DST, your position is LAT 30°48.0'N,
LONG 71°00.0'W. You are on a course of 167°T at 15.2 knots. At what time will local apparent noon (LAN) occur ZT at your vessel? You are keeping DST.
N a. 1145 N b. 1202 N c. 1218 Y d. 1245 1499: On 16 June , your 0430 zone time DR position is LAT 29°24.0'S, LONG 36°16.0'E. At that time, you observe Vega bearing 341.0°psc. The chronometer reads 02h 32m 06s, and the chronometer error is 01m 54s fast. The variation is 20.5°W. What is the deviation?
N a. 3.2°E N b. 3.2°W Y c. 2.4°W N d. 2.8°E 1663: On 7 April , in DR position LAT 27°42.0'N, LONG 114°03.0'W, you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 076°psc. The chronometer reads 02h 10m 17s and is 01m 52s slow. Variation in the area is 8°E. What is the deviation of the standard magnetic compass?
Y a. 1.8°W N b. 2.3°E N c. 6.2°E N d. 7.8°W 1668: On 20 June , your vessel's 1955 ZT DR position is LAT 52°38.9'N, LONG 03°42.7'E, when an amplitude of the Sun is observed. The Sun's center is on the visible horizon and bears 311° per gyrocompass. Variation in the area is 6°W. At the time of the observation, the helmsman noted that he was heading 352° per gyrocompass and 358° per steering compass. What is the gyro error and deviation for that heading?
N a. 1.3°W GE, 1.3°E DEV N b. 0.0° GE, 0.0° DEV N c. 1.3°W GE, 1.3°W DEV Y d. 1.3°E GE, 1.3°E DEV 1724: What is the mile point of the Natchez, MS Gage?
N a. 228.4 AHP N b. 265.4 AHP N c. 302.4 AHP Y d. 363.3 AHP 1739: The Delta-Friar Point revetment on the LMR extends from mile __________.
N a. 645.6 - 641.4 RDB N b. 652.8 - 649.6 RDB N c. 648.5 - 645.5 LDB Y d. 657.3 - 652.2 LDB 1891: On 22 July , your 1759 DR position is LAT 24°50.2'S, LONG 005°16.0'E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?
N a. Regulus N b. Antares Y c. Miaplacidus N d. Suhail 2006: On 8 November , your 1731 zone time DR position is LAT 27°16.0'N, LONG 137°25.0'W. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?
Y a. Alphecca, Fomalhaut, Schedar N b. Antares, Rasalhague, Altair N c. Sirius, Hamal, Dubhe N d. Peacock, Ankaa, Al Na'ir 2054: The Natchez Gage reads 16.3 feet. The high point on your towboat is 38 feet above water. What is the vertical clearance when you pass under the Natchez Highway Bridge?
N a. 79.0 feet Y b. 71.7 feet N c. 65.2 feet N d. 59.1 feet 2157: On 25 May , your vessel's 1917 zone time position is LAT 24°16.0'N, LONG 017°26.0'W. At that time a sextant observation of the planet Saturn was made. The sextant altitude is 63°05.1', and the chronometer reads 08h 18m 24s. The index error is 4.5' off the arc, and the chronometer error is 01m 05s fast. Your height of eye is determined to be 62.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 143.8° Y b. 147.3° N c. 148.7° N d. 149.9° 2172: On 11 October , at 0516 ZT, morning stars were observed, and the vessel's position was determined to be LAT 23°21.0'N, LONG 139°27.0'W. Your vessel is steaming at 14.0 knots on a course of 293°T. A sextant observation of the Sun's lower limb is made at 0927 ZT. The chronometer reads 06h 30m 21s, and the sextant altitude (hs) is 39°48.7'. The index error is 2.0' on the arc, and the chronometer error is 02m 56s fast. Your height of eye on the bridge is 63.0 feet. What is the azimuth (Zn) of this sight using the assumed position?
N a. 116.2°T Y b. 123.4°T N c. 126.2°T N d. 128.4°T 2651: You are steering 246°T, and a light is picked up dead ahead at a distance of 14 miles at 1037. You change course to pass the light 2.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 2.5 miles off the light?
N a. 1143 Y b. 1146 N c. 1149 N d. 1152 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 2901: You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?
Y a. 14.8 miles N b. 15.3 miles N c. 15.8 miles N d. 16.3 miles 3300: You have steamed 156 miles and consumed 19 tons of fuel. If you maintain the same speed, how many tons of fuel will you consume while steaming 273 miles?
N a. 23.6 tons N b. 27.9 tons Y c. 33.3 tons N d. 37.2 tons 3760: 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 352°T, and the variation is 4°W. If the heading of your vessel at the time of the sighting is 359° per standard magnetic compass, what is the correct deviation?
Y a. 3°W N b. 7°E N c. 11°E N d. 11°W 3763: Your vessel is proceeding up a channel, and you see a pair of range lights that are in line dead ahead. The chart indicates that the direction of this pair of lights is 178°T, and the variation is 9°W. If the heading of your vessel at the time of the sighting is 180° per standard magnetic compass, what is the deviation?
N a. 2°E N b. 2°W Y c. 7°E N d. 7°W 11501: At 2016 your GPS position is LAT 41°07.6'N, LONG 71°33.8'W. At 2128 your 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 N c. 8.9 knots Y d. 6.7 knots 11705: 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 the current is 043°T at 1.3 knots, a south-southeasterly wind is causing 3° of leeway, and you are turning for 8.7 knots?
N a. 260.5°psc N b. 264.0°psc Y c. 268.0°psc N d. 271.5°psc 11902: What is the true course to steer between the entrance to Lake Montauk (LAT 41°04.8'N, LONG 71°56.3'W) and Winnapaug Pond entrance) LAT 41°19.6'N, LONG 71°45.8'W), if you are turning for 9.5 knots, allow for a current of 075°T at 1.2 knots, and a westerly wind is causing 3° of leeway?
Y a. 021°T N b. 024°T N c. 027°T N d. 029°T 13305: What are the bottom characteristics of Nautilus Shoal (LAT 37°03'N, LONG 75°56'W)?
N a. Sand and shells N b. Hard sand Y c. Fine gray sand N d. Mud and sand 13810: Which chart would you use if you planned to continue westward beyond the coverage of this chart?
Y a. 12363 N b. 12373 N c. 13205 N d. 13218 13902: A vessel enroute to Long Island Sound from sea will enter waters governed by the Inland Rules of the Road __________.
N a. when crossing the Territorial Sea boundary N b. between Montauk Point and Block Island N c. when north of latitude 41°10.0'N Y d. when passing through The Race 15209: At 1800, Tue Marshes Light bears 264.5°pgc, York Spit Swash Channel Light "3" bears 007°pgc. Your position is __________.
N a. LAT 37°15.5'N, LONG 76°19.8'W N b. LAT 37°15.2'N, LONG 76°20.3'W N c. LAT 37°15.0'N, LONG 76°20.0'W Y d. LAT 37°14.5'N, LONG 76°20.1'W 15261: You make good 097°T from your 0830 fix. With a westerly current of 1.2 knots, what engine speed will you have to turn for from your 0830 position in order to arrive abeam of Six Mile Reef Buoy "8C" at 1030?
N a. 9.7 knots Y b. 10.5 knots N c. 10.9 knots N d. 12.1 knots 15619: At 2123, your position is LAT 37°20.0'N, LONG 76°03.0'W. What is your distance offshore of Savage Neck?
N a. 4.3 miles N b. 3.4 miles N c. 2.6 miles Y d. 1.7 miles 15661: At 0727, the cupola on Fishers Island is in line with Latimer Reef Light bearing 024°pgc. Based on this, the gyro error is __________.
N a. 2°E N b. 1°E N c. 0° Y d. 3°W 15826: In high water conditions, which publication would you consult for the latest information on buoys between Baton Rouge and Cairo?
Y a. U.S.C.G. Local Notice to Mariners N b. U.S.C.G. Light List N c. Army Corps. of Engineers Navigation Chart N d. List of Buoys and Daymarks 16008: While on a heading of 082°T, you sight Middle Ground Light in line with Old Field Point Light bearing 206° per standard magnetic compass. From this you can determine the __________.
N a. variation Y b. deviation table is correct for that heading N c. compass error is 17.5°E N d. deviation is 3.5°E for a bearing of 206° per standard magnetic compass 16217: Which statement describes the shore between Watch Hill Point and Point Judith?
N a. Low, rocky cliffs with heavily wooded hills inland Y b. Sandy beaches broken by rocky points N c. Sand dunes and beaches with a mud and sand bottom N d. Wooded, barren hills with isolated prominent buildings 16309: From your 0530 position, you set a course of 271°psc with an engine speed of 9 knots. At 0645, Cornfield Safe-Water Buoy "CF" is abeam to port. What speed have you averaged since 0530?
N a. 7.5 knots Y b. 8.6 knots N c. 9.0 knots N d. 9.5 knots 16314: At 0820, you take the following bearings:
Branford Reef Light bearing 307° true
Falkner Island Light bearing 052° true
What are the set and drift since 0730?
N a. Set 052°T, drift 1.1 knots N b. Set 052°T, drift 1.3 knots N c. Set 236°T, drift 1.1 knot Y d. Set 236°T, drift 1.3 knots 16406: At 0227, you take the following radar ranges and bearings:
Bartlett Reef Light 359°T at 2.4 miles
Race Rock Light 083°T at 4.1 miles
What is your 0227 position?
Y a. LAT 41°14.1'N, LONG 72°08.2'W N b. LAT 41°14.2'N, LONG 72°08.4'W N c. LAT 41°14.0'N, LONG 72°08.5'W N d. LAT 41°14.3'N, LONG 72°08.5'W 16414: At 1110, you increase speed to 12 knots. What is your ETA at the new position?
N a. 1157 N b. 1208 Y c. 1215 N d. 1219 16541: At 2255 you take the following visual bearings.
Saybrook Breakwater Light 333°pgc
Little Gull Island Light 094°pgc
Horton Point Light 211°pgc
What is your position?
Y a. LAT 41°13.6'N, LONG 72°19.2'W N b. LAT 41°13.8'N, LONG 72°19.6'W N c. LAT 41°14.0'N, LONG 72°19.0'W N d. LAT 41°14.2'N, LONG 72°19.7'W 16711: At what time will you cross the 60 foot curve if you make good 12 knots?
Y a. 0528 N b. 0534 N c. 0541 N d. 0544 16720: In order to check your compasses, you sight North Dumpling Island Light in line with Latimer Reef Light bearing 074°
pgc. The helmsman was steering 303°pgc and 315° per standard magnetic compass at the time. Which of the following is TRUE?
Y a. The gyro error is still 2°E. N b. The deviation based on the observation is 15°W. N c. The magnetic compass error is 12°W. N d. The true line of the range is 072°.