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.
49: As you pass under the Greenville Highway Bridge, you estimate the current as 4.5 mph. What is the speed over the ground, if your vessel is making turns for 9 mph?
Y a. 13.5 mph N b. 14.5 mph N c. 15.5 mph N d. 16.5 mph 67: The Gage at Red River Landing reads 22.2 feet. The LWRP for Red River is 10.6 feet. What is the water level in relation to the low water reference plane?
N a. 32.8 ft below N b. 32.8 ft above N c. 11.6 ft below Y d. 11.6 ft above 84: What is the distance from the Amoco Docks at Baton Rouge, LA, to the mouth of the Ohio River?
N a. 981.5 miles N b. 953.5 miles N c. 727.9 miles Y d. 700.2 miles 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 171: At 2015, your vessel is at the Chesapeake Bay Bridge and Tunnel midway between buoys "13" and "14". If the height of tide is -1 foot (-0.3 meters), what is the approximate depth of water?
N a. 35 feet (10.6 meters) N b. 43 feet (13.1 meters) N c. 46 feet (13.9 meters) Y d. 53 feet (15.5 meters) 252: At 0100, you obtain the following radar ranges:
Inlet Point - 2.7 miles,
Rocky Point - 4.5 miles,
Horton Point - 1.0 mile.
What was the speed made good between 0045 and 0100?
N a. 6.7 knots Y b. 7.2 knots N c. 8.0 knots N d. 8.7 knots 408: You depart LAT 37°36'N, LONG 123°00'W, and steam 2022 miles on course 241°T. What is the longitude of your arrival by Mercator sailing?
N a. LONG 163°28.2'W N b. LONG 163°18.2'W Y c. LONG 156°51.7'W N d. LONG 154°18.3'W 445: You can follow what loran reading between your two positions?
N a. There is no loran reading to follow. N b. 9960-Y-43958 Y c. 9960-X-25982 N d. 9960-W-14655 451: Determine the great circle distance and initial course from LAT 27°51.0'N, LONG 71°41.0'W to LAT 49°45.0'N, LONG 06°14.0'W.
N a. 3196 miles, 313.1°T Y b. 3214 miles, 046.9°T N c. 3219 miles, 042.5°T N d. 3231 miles, 041.4°T 542: You observe the planet Saturn at a sextant altitude (hs) of 63°05.1' on 25 May . The index error is 4.5' off the arc. The height of eye is 62 feet. What is the observed altitude (Ho)?
N a. 63°00.6' Y b. 63°01.5' N c. 63°02.9' N d. 63°04.1' 572: At 0908, you change course to 010°T. What course should you steer per standard magnetic compass?
N a. 359° Y b. 021° N c. 017° N d. 003° 680: On which voyage would a great circle track provide a significant savings in distance to steam, when compared to a rhumb line track? (Use gnomonic tracking chart WOXZC 5270.)
N a. Valdez, AK, to the Marquesas Islands (LAT 8°00'S, LONG 140°00'W) N b. San Francisco to Kodiak, AK N c. Christmas Island (LAT 2°00'N, LONG 157°30'W) to Singapore via LAT 3°00'N, LONG 126°00'E Y d. Guam (LAT 14°00'N, LONG 145°00'E) to Seattle via LAT 47°30'N, LONG 125°30'W 817: On 15 December , in DR position LAT 23°24.0'N, LONG 55°36.0'W, you take an ex-meridian observation of the Sun's lower limb. The chronometer time of the sight is 03h 45m 19s, and the chronometer error is 00m 00s. The sextant altitude (hs) is 43°02.3'. The index error is 2.6' on the arc, and your height of eye is 65.0 feet. What is the latitude at meridian transit?
Y a. LAT 23°33.5'N N b. LAT 23°35.8'N N c. LAT 23°38.1'N N d. LAT 23°40.6'N 1007: On 30 July , your 1030 ZT DR position is LAT 17°46'N, LONG 139°30'W. You are on course 129°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1220 138°25.0' N 18°22.3' 88°43.3'
1226 139°55.0' N 18°22.2' 88°24.0'
N a. LAT 17°24.0'N, LONG 138°59.8'W N b. LAT 17°21.6'N, LONG 138°56.2'W N c. LAT 17°18.7'N, LONG 139°07.6'W Y d. LAT 17°15.1'N, LONG 139°00.0'W 1088: On 9 June , your 0000 DR position is LAT 26°14.0'S, LONG 176°38.1'E. You are on course 223°T, speed 17.8 knots. You observed 4 celestial bodies. Determine the latitude and longitude of your 0630 running fix.
Y a. LAT 27°44.7'S, LONG 174°57.1'E N b. LAT 27°46.2'S, LONG 175°03.0'E N c. LAT 27°41.2'S, LONG 175°01.2'E N d. LAT 27°38.5'S, LONG 175°06.3'E 1464: On 17 May , your 1554 zone time DR position is LAT 26°33.0'N, LONG 65°46.0'W. At that time, you observe the Sun bearing 269°psc. The chronometer reads 07h 55m 47s, and the chronometer error is 01m 14s fast. The variation is 3°W. What is the deviation of the standard magnetic compass?
N a. 0.6°E N b. 1.6°W N c. 4.6°W Y d. 7.6°E 1701: The latest available information on the channel conditions above Baton Rouge that includes the latest buoy information, as well as recommended courses, is found in the __________.
N a. Corps. of Engineers maps N b. Waterways Journal Y c. Local Notice to Mariners N d. Sailing Directions 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 1869: On 12 June , your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 282.5°T at a sextant altitude (hs) of 14°22.3'. The index error is 0.5'
on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?
N a. Wezen Y b. Alhena N c. Mirzam N d. Menkalinan 2028: You are turning for 10 mph and passing Hog Point, LA. (mile 297.5 AHP). Angola reports that the current at Red River Landing is 4.5 mph. Which statement is TRUE?
N a. The main channel lies on the south side of the island you see ahead. N b. You are making 14.5 mph over the ground. Y c. An underwater stone dike has been constructed 0.5 miles upstream of Miles Bar Towhead. N d. You would expect to find the more favorable current near the broken red line in the river. 2109: At 0100, you obtain the following bearings:
Rocky Point Lookout Tower 062°T
Horton Point Lighthouse 189°T
What was the speed made good between 0045 and 0100?
Y a. 7.4 knots N b. 8.0 knots N c. 8.7 knots N d. 9.2 knots 2118: You are northwest of Port Jefferson Harbor steering 242°
per standard magnetic compass. As you continue westward, you see that the Port Jefferson Range Front Light and Rear Light come into line. If the deviation table is correct, the bearing of the range should be __________.
N a. 140°psc N b. 146°psc Y c. 157°psc N d. 160°psc 2175: On 13 November , at 0438 ZT, morning stars were observed and the vessel's position was determined to be LAT 22°14.0'S, LONG 79°23.0'E. Your vessel is steaming at 13.0 knots on a course of 242°T. A sextant observation of the Sun's lower limb is made at 0822 ZT. The chronometer reads 03h 20m 16s, and the sextant altitude (hs) is 45°49.7'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye on the bridge is 61.0 feet (18.6 meters). What is the azimuth (Zn) of this sight using the assumed position?
Y a. 092.6°T N b. 096.2°T N c. 098.7°T N d. 099.7°T 2872: Your vessel is on a course of 272°T at 15 knots. At 2113 a light bears 245.5°T, and at 2120 the light bears 227°T.
At what time and at what distance off will your vessel be when abeam of the light?
N a. 2124, 1.3 miles Y b. 2127, 1.8 miles N c. 2131, 2.3 miles N d. 2135, 2.7 miles 3103: You are turning 93 RPM, with a propeller pitch of 25 feet, and an estimated slip of 0%. What is the speed of advance?
N a. 20.2 knots N b. 21.9 knots N c. 22.4 knots Y d. 22.9 knots 3253: You have steamed 925 miles at 13.5 knots, and consumed 181 tons of fuel. If you have 259 tons of usable fuel remaining, how far can you steam at 16 knots?
N a. 795 miles Y b. 942 miles N c. 1117 miles N d. 1409 miles 3284: While steaming at 18.9 knots, your vessel consumes 386 barrels of fuel oil per day. In order to reduce consumption to 251 barrels of fuel oil per day, what is the maximum speed the vessel can turn for?
N a. 11.6 knots N b. 12.3 knots N c. 15.2 knots Y d. 16.4 knots 3608: You are steering 125°pgc. The wind is southwest by south causing a 3° leeway. The variation is 6°E, the deviation is 2°W, and the gyro error is 1°W. What is the true course made good?
Y a. 121°T N b. 123°T N c. 127°T N d. 129°T 3627: Your vessel is steering course 243°psc. Variation for the area is 5°E, and deviation is 2°W. The wind is from the south-southeast, producing a 2° leeway. What true course are you making good?
N a. 242°T N b. 244°T N c. 246°T Y d. 248°T 10704: At 2038 your position is LAT 41°09.2'N, LONG 71°40.6'W. You are on course 301° per standard magnetic compass at 7.2 knots. At 2152 your position is LAT 41°11.3'N, LONG 71°48.6'W. What were the set and drift?
N a. 080°T at 1.0 knot Y b. 096°T at 2.0 knots N c. 261°T at 1.2 knots N d. 277°T at 0.9 knot 11708: Your position is LAT 37°00.9'N, LONG 75°30.0'W. What is the course to steer per 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 339°T at 1.3 knots, and a northwesterly wind is causing 3° of leeway?
Y a. 265°psc N b. 267°psc N c. 269°psc N d. 271°psc 11803: What is the true course to steer between Falkner Island Light and Horton Point Light, if the set and drift of the current are 041° at 2.4 knots, and a northeasterly wind will cause 4° of leeway? Your engines are making turns for 15 knots.
N a. 116°T N b. 124°T Y c. 134°T N d. 142°T 11804: Your engines are making turns for 8 knots and a northerly wind is causing 3° of leeway. There is a current of 220°T at 1.5 knots. What is the course to steer between Branford Reef Light and Faulkner Island Light?
Y a. 084°T N b. 095°T N c. 102°T N d. 108°T 11805: What is the true course to steer between Stratford Shoal (Middle Ground Light) and New Haven Light, if the set and drift of the current are 048°T at 2 knots, and a southeasterly wind will cause 2° of leeway? Your engines are making turns for 10 knots.
N a. 032°T Y b. 037°T N c. 039°T N d. 041°T 11908: Your position is 3 miles due east of Montauk Point Light. What is the course to steer to arrive at LAT 41°00.0'N, LONG 71°30.0'W, if you are turning for 7.8 knots, the current is 330° at 1.2 knots, and a southerly wind causes 3° of leeway?
Y a. 117°T N b. 112°T N c. 104°T N d. 102°T 15257: At 0725, Stratford Point Light bears 327°pgc at 3.1 miles.
At this time, you wish to change course to 048°T. The current is 135°T at 1.8 knots. Your engine speed is 8 knots. What course must you steer to make good 048°T?
Y a. 035°T N b. 038°T N c. 041°T N d. 044°T 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 15408: From your 1430 fix, you order turns for 8 knots. You steer 045°T and experience no set and drift. At what time would you expect to have New Point Comfort Spit Light "4" abeam?
N a. 1452 Y b. 1458 N c. 1504 N d. 1510 15518: From your 1930 position, you plot a course to pass 0.5 mile due south of Race Rock Light. If your vessel's speed is 10.0 knots, the current's set and drift are 040°T at 1.8 knots, and a north wind produces a 3° leeway, what true course should you steer to make good your desired course?
N a. 275°T Y b. 280°T N c. 290°T N d. 294°T 15565: 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. 251°pgc N b. 254°pgc N c. 257°pgc Y d. 261°pgc 15643: The light on Block Island Sound South Entrance Obstruction Buoy "BIS" is reported extinguished. Which of the following will serve as a positive warning that you are being set onto the obstruction?
N a. Radar ranges to Southwest Point of less than 7.9 miles N b. Soundings of less than 50 feet N c. Shagwong Reef Lighted Bell Buoy "7SR" 3.1 miles off abeam Y d. Race Rock Light bearing 299°T and decreasing 15912: If there is no current, what is the course per standard magnetic compass from your 0802 fix to the position 1.1 miles north of Falkner Island Light?
N a. 064° N b. 068° Y c. 095° N d. 099° 16245: At 2259 Cape Henry Light bears 250°T, Chesapeake Light bears 122°T, and North Chesapeake Entrance Lighted Whistle Buoy "NCA" has a radar range of 1.8 miles. Which statement is TRUE?
N a. The course made good is 226°T. N b. You are in the red sector of Cape Henry Light. N c. You are in a submerged submarine transit lane. Y d. Chesapeake Light is 7.6 miles off. 16443: As you transit the Chesapeake Bay Bridge and Tunnel, you take a gyro bearing of trestle C when it is in line. The gyro bearing was 050°. At that time, the helmsman noted that he was heading 139°pgc and 146° per standard magnetic compass. What is the deviation?
Y a. 2°E N b. 0° N c. 2°W N d. 4°W 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