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.
74: You are turning for 7.8 mph and estimate the current at 1.0 mph. What is your speed over the ground?
N a. 6.8 mph N b. 7.8 mph N c. 7.9 mph Y d. 8.8 mph 164: The Helena Gage reads 9.4 feet. The high point on your towboat is 42 feet above water. What is the vertical clearance when you pass under the Helena Highway Bridge?
N a. 53.0 feet N b. 64.2 feet Y c. 68.0 feet N d. 110.0 feet 267: At 0802, Branford Reef Light bears 348°T at 0.75 mile, and the north point of Falkner Island bears 088°T at 6.7 miles. What were the set and drift since 0740?
N a. Set 040°T, drift .2 knot N b. Set 220°T, drift .2 knot Y c. Set 220°T, drift .6 knot N d. You are making good your intended course and speed. 401: Your vessel receives a distress call from a vessel reporting her position as LAT 35°01'S, LONG 18°51'W. Your position is LAT 30°18'S, LONG 21°42'W. Determine the true course from your vessel to the vessel in distress by Mercator sailing.
N a. 135°T N b. 149°T Y c. 153°T N d. 160°T 543: What was the current between 0520 and 0600?
N a. 201° at 1.0 knot N b. 201° at 1.5 knot Y c. 021° at 1.5 knot N d. 021° at 1.0 knots 605: At 0915 ZT, on 26 July , you depart Yokohama, LAT 35°27.0'N, LONG 139°39.0'E (ZD -9). You are bound for Seattle, LAT 47°36.0'N, LONG 122°22.0'W, and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated ZT of arrival at Seattle?
Y a. 0728, 7 August N b. 1528, 7 August N c. 0028, 8 August N d. 1528, 8 August 685: What company does NOT have a marine facility along the river bank in Madison Parish (mile 457.0 AHP)?
N a. Complex Chemical Co. N b. Delta Southern Railroads Y c. Baxter Wilson Steam N d. Farm Chemical 832: On 19 November , in DR position LAT 20°03.5'N, LONG 129°48.0'W, you take an ex-meridian observation of the planet Venus at upper transit. The chronometer time of the sight is 11h 29m 44s, and the chronometer error is 01m 23s slow. The sextant altitude (hs) is 43°54.3'. The index error is 2.0' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?
N a. 20°08.2'N Y b. 19°58.0'N N c. 19°53.2'N N d. 19°50.6'N 1000: On 18 May , your 1030 ZT DR position is LAT 18°30'N, LONG 62°31'W. You are on course 286°T, speed 24 knots. Determine your 1200 position using the following observations of the Sun.
ZONE TIME GHA DECLINATION Ho
1204 61°54.6' N 19°37.6' 88°39.7'
1210 63°24.6' N 19°37.7' 88°59.2'
N a. LAT 18°33.6'N, LONG 62°54.3'W N b. LAT 18°35.2'N, LONG 62°49.7'W N c. LAT 18°38.7'N, LONG 62°59.2'W Y d. LAT 18°41.1'N, LONG 62°53.9'W 1120: At 0850, 4 January, you pass the Gage at Natchez, MS which reads 26.8 feet. The low water reference plane (LWRP) for Natchez is 6.1 feet. What is the water level in relation to the low water reference plane?
Y a. 20.7 ft above N b. 20.7 ft below N c. 32.9 ft above N d. 32.9 ft below 1129: Which daymark should you see as you approach French Point Light (mile 915.4 AHP)?
N a. Red diamond N b. Green square Y c. Red triangle N d. Green diamond 1149: As you approach Dean Island Light (mile 754.8 AHP), which type of daymark will be observed at the light?
N a. Green triangle Y b. Green diamond N c. Green square N d. Red-and-green banded square 1211: It is 15 July and you are keeping +7 zone time. You are on course 095°, speed 16 knots. Your 0800 DR position is LAT 25°39.4'N, LONG 129°46.2'W. What is the time of the second estimate of LAN by ship's clocks?
N a. 13h 40m 17s Y b. 13h 38m 26s N c. 12h 42m 20s N d. 12h 38m 20s 1503: On 30 July , your 0200 zone time (ZD +4) DR position is LAT 43°48'N, LONG 78°00 W. At that time, you observe Polaris bearing 008.7°psc. The chronometer time of the observation is 05h 58m 07s, and the chronometer is 0m 23s slow. The variation is 10.5°W. What is the deviation of the magnetic compass?
N a. 0.5°E Y b. 3.0°E N c. 7.5°W N d. 18.0°W 1540: You estimate the current at 2.0 mph. What is the speed over the ground?
N a. 9.5 mph Y b. 5.5 mph N c. 5.0 mph N d. 4.5 mph 1681: On 8 December , in DR position LAT 21°56.1'S, LONG 17°21.6'E you observe an amplitude of the Sun. The Sun's center is on the celestial horizon and bears 240.5°psc. The chronometer reads 05h 27m 21s and is 00m 47s fast. Variation in the area is 3.3°E. What is the deviation of the standard magnetic compass?
N a. 1.5°W N b. 0.3°W N c. 0.6°E Y d. 1.5°E 1685: As you approach Buckridge Light (mile 412.5 AHP), which type of daymark would you see on the light structure?
N a. Red square N b. Green square N c. Red diamond Y d. Green diamond 1775: At 1412 you increase speed to make good 10.2 mph. At 1506 you have a daymark on your port beam. Which daymark is this?
N a. Bessie Daymark Y b. Nolan Light N c. Everetts Light N d. Marr Towhead Light 1908: On 22 March , your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 315°T at an observed altitude (Ho) of 66°01.2'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?
N a. Regulus N b. Menkar Y c. Rigel N d. Alphard 1960: The low water reference plane for Greenville Highway Bridge is 11.3 feet. If the Gage at the Greenville Highway Bridge reads 22.0 feet, what is the water level in relation to the low water reference plane (LWRP)?
N a. 22.1 feet below the LWRP N b. 10.7 feet below the LWRP Y c. 10.7 feet above the LWRP N d. 0.5 feet below the LWRP 2319: You complete changing out your tow and get underway enroute Ark City Tank Storage (mile 554.0 AHP) to deliver the tank barges. What is the distance you must travel from Cairo Point Light?
N a. 606.8 miles N b. 554.0 miles Y c. 399.8 miles N d. 202.1 miles 2328: As you pass through the Chesapeake Bay Bridge and Tunnel, you sight Trestle "B" in line bearing 018°pgc. What is the gyro error by observation?
N a. 2°E Y b. 0° N c. 2°W N d. 4°W 2331: What is the coastwise distance from your 0731 fix to Wilmington, DE (LAT 39°43.2'N, LONG 75°31.5'W)?
N a. 339 miles N b. 309 miles N c. 245 miles Y d. 221 miles 2454: What is the width of the widest span of the Cairo Highway Bridge (Upper Mississippi River mile 1.3)?
N a. 800 feet Y b. 675 feet N c. 625 feet N d. 503 feet 2674: You are steaming on course 126°T at 14.8 knots. At 1022 you sight a buoy bearing 128°T, at a range of 4.8 miles. If you change course at 1026, what true course will you steer to leave the buoy 0.5 mile abeam to port?
Y a. 136° N b. 133° N c. 122° N d. 119° 2706: While on a course of 216°pgc, a light bears 12° on the port bow at a distance of 11.2 miles. Which course should you steer to pass 2 miles abeam of the light leaving it to port?
N a. 208°pgc N b. 210°pgc N c. 212°pgc Y d. 214°pgc 2890: You are steaming on a course of 084°T at a speed of 13 knots. At 1919 a lighthouse bears 106.5°T. At 1957 the same lighthouse bears 129°T. What will be your distance off the lighthouse when abeam?
N a. 4.3 miles Y b. 5.7 miles N c. 7.1 miles N d. 8.2 miles 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 3110: You are turning 78 RPM, with a propeller pitch of 21 feet, and an estimated slip of -7%. What is the speed of advance?
N a. 14.9 knots N b. 15.7 knots Y c. 17.3 knots N d. 17.8 knots 3601: You are steering 142°pgc to make good your desired course. The gyro error is 1°E . The variation is 8°W. What should you steer by standard magnetic compass to make good the desired course?
DEVIATION TABLE MAGNETIC HEADING DEV.
120° 4°E 135° 2°E 150° 0°
N a. 133°psc N b. 146°psc N c. 148°psc Y d. 151°psc 3641: You desire to make good a true course of 174°. The variation is 17°W, magnetic compass deviation is 4°W, and gyrocompass error is 4°E. A west-southwest wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?
N a. 195°psc N b. 197°psc Y c. 199°psc N d. 203°psc 3751: While proceeding up a channel on course 010° per gyro compass, you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check of the chart shows the range to be 009°T and the variation to be 15°W. If the ship's course is 026°psc, what is the deviation for the present heading?
Y a. 2°W N b. 2°E N c. 1°W N d. 1°E 3754: 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 014°T, and the variation is 11°E. If the heading of your vessel at the time of the sighting is 009° per standard magnetic compass, what is the correct deviation?
N a. 5°E N b. 5°W N c. 6°E Y d. 6°W 4011: 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 magnetic compass heading of 234°.
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°
N a. 2.5°W N b. 2.5°E N c. 1.0°W Y d. 0.5°E 11007: What will be the height of the high water at Mount Sinai Harbor on the morning of 26 August 1983?
N a. 4.1 feet Y b. 6.3 feet N c. 7.2 feet N d. 8.4 feet 11903: What is the true course to steer between the entrance to Winnapaug Pond (LAT 41°19.6'N, LONG 71°45.8'W) and the entrance to Lake Montauk (LAT 41°04.8'N, LONG 71°56.3'W), if you are turning for 8.5 knots, allowing for a current of 095°T at 0.9 knot, and an easterly wind is causing 3° of leeway?
N a. 200°T N b. 208°T Y c. 211°T N d. 214°T 12909: At 0914 you are in Chesapeake Bay southeast inbound lane with buoy "CBJ" close aboard to port. What is your ETA at Thimble Shoal Channel Buoy "19" if you are making 10.9 knots?
N a. 1034 Y b. 1038 N c. 1046 N d. 1042 13703: NOAA weather broadcasts can be received on what frequency while navigating off Cape Henry?
N a. 162.45 MHz Y b. 162.55 MHz N c. 162.65 MHz N d. 162.70 MHz 14515: At 2150, your position is LAT 36°57.2'N, LONG 76°01.3'W. In this position on the chart, you note a light magenta line running in a direction of 030°T. This line indicates the limits of __________.
N a. a precautionary area Y b. a pilotage area N c. the Cape Henry Light red sector N d. chart 12222 14604: Contour elevations on this chart refer to heights in feet above mean __________.
N a. lower low water N b. high water N c. low water Y d. sea level 14703: At 0800 your vessel is at mile 110 proceeding in an easterly direction on the Columbia River. At 1030 Reed Island is abeam to port as you pass the 125 mile mark. What has been your average speed in knots?
N a. 4.3 knots Y b. 5.2 knots N c. 8.7 knots N d. 10.0 knots 15045: From your 0841 position, you are steering a course of 241°
true to the northeasterly inbound channel entrance, your speed is now 15 knots. What is your ETA abeam of buoy "NCA" (LL#375)?
N a. 0850 Y b. 0855 N c. 0901 N d. 0911 15108: Your 1752 position places you __________.
Y a. less than 0.5 mile westward of York Spit Channel N b. less than 0.5 mile eastward of York Spit Channel N c. greater than 0.5 mile westward of York Spit Channel N d. greater than 0.5 mile eastward of York Spit Channel 15345: You are making good a course of 060°T at a speed of 13.5 knots. At 1855 Block Island North Light bears 086°T; at 1910 Block Island North Light bears 108°T; and at 1930 the same light bears 184°T. Which statement is TRUE about your 1930 running fix position?
Y a. You are on the edge of a cable area. N b. The bottom is mud, sand, and clay. N c. The wavy magenta lines to the north through east of your position are designated lobstering areas. N d. You are inside the 120 fathom curve 16240: The speed that you can expect to make good, while steering to make good your desired course, is __________.
N a. 13.5 knots Y b. 14.3 knots N c. 15.1 knots N d. 15.9 knots 16319: As you enter the New Haven Outer Channel, you sight the outer range markers in line directly ahead. Your heading at this time is 347°psc. What is your compass deviation by observation?
Y a. 0.5°East N b. 3.0°East N c. 3.5°West N d. 4.5°East 16519: As you head toward Great Salt Pond, visibility is unlimited. At what time will you lose sight of Montauk Pt.
Light?
N a. 0905 N b. 0928 N c. 0950 Y d. It will remain visible to Great Salt Pond. 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