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.
16: The direction of the surface wind is __________.
N a. directly from high pressure toward low pressure N b. directly from low pressure toward high pressure Y c. from high pressure toward low pressure deflected by the earth's rotation N d. from low pressure toward high pressure deflected by the earth's rotation 71: A preferred-channel buoy may be __________.
Y a. lettered N b. spherical N c. showing a white light N d. All of the above 84: When using an echo sounder in deep water, it is NOT unusual to __________.
Y a. receive a strong return at about 200 fathoms (366 meters) during the day, and one nearer the surface at night N b. receive a first return near the surface during the day, and a strong return at about 200 fathoms (366 meters) at night N c. receive false echoes at a constant depth day and night N d. have to recalibrate every couple of days due to inaccurate readings 104: What should you apply to a fathometer reading to determine the depth of water?
N a. Subtract the draft of the vessel. Y b. Add the draft of the vessel. N c. Subtract the sea water correction . N d. Add the sea water correction. 338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents __________. (D042NG )
N a. hail N b. freezing rain Y c. rain N d. snow 346: If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?
N a. East to northeast N b. East to southeast Y c. North to northwest N d. South to southeast 369: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. What course should you steer at 11 knots to have the maximum CPA?
N a. 250° N b. 234° N c. 227° Y d. 215 ° 412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.
Y a. Pilot Chart N b. Coast Pilot N c. Notice to Mariners N d. None of the above 485: A phase correction is applied to observations of __________.
N a. the Sun N b. stars Y c. planets N d. All of the above 495: A semidiameter correction is applied to observations of __________.
N a. Mars Y b. the Moon N c. Jupiter N d. All of the above 526: When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.
N a. high pressure area Y b. extratropical low-pressure system N c. tropical storm N d. easterly wave 540: A white buoy with an orange rectangle on it is used to indicate __________.
N a. danger N b. a controlled area N c. an exclusion area Y d. general information 548: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
N a. have either a double ebb or a double flood N b. become reversing currents Y c. become weak and variable N d. exceed the predicted velocities 589: What is the index error of sextant D? (D050NG )
N a. 7'10" on the arc N b. 6'50" on the arc N c. 3'00" on the arc Y d. 2'10" on the arc 609: A tropical wave is located 200 miles due west of your position, which is north of the equator. Where will the wave be in 24 hours?
Y a. Farther away to the west N b. Farther away to the east N c. In the same place N d. Closer and to the west 667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.
N a. behind the typhoon, measured from 90° to 180°From each side of the storm's track Y b. to the right of the storm's track N c. ahead of the typhoon, measured from the storm's track to 90° on each side N d. measured from due south, counterclockwise 180° 679: A tropical wave is usually preceded by __________.
N a. tropical storms Y b. good weather N c. heavy rain and cloudiness N d. heavy seas 708: Which statement about Radio Navigational Warning Broadcasts is TRUE?
N a. Radio navigational warnings are valid for 10 days, unless cancelled earlier. N b. NAVAREA warnings cover coastal areas only, while HYDROLANTS or HYDROPACS cover entire ocean areas. Y c. Radio navigational warnings issued by NGA (NIMA) are published in the Daily Memorandum and the Notice to Mariners. N d. HYDROLANTS and HYDROPACS cover the same geographical areas as NAVAREA warnings, but are for the use of military vessels only. 738: Most GPS receivers use the Doppler shift of the carrier phase to compute __________.
N a. Latitude N b. Longitude Y c. Speed N d. Time 828: The true wind has been determined to be from 210°T, speed 12 knots. You desire the apparent wind to be 30 knots from 10° on the port bow. What course must you steer, and what speed must you make for this to occur?
Y a. 235°T, 18.6 knots N b. 245°T, 20.0 knots N c. 325°T, 22.4 knots N d. 335°T, 23.6 knots 880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
N a. 60° Y b. 90° N c. 45° N d. 30° 969: The population of northern right whales, an endangered species, numbers approximately __________.
Y a. 300 N b. 5000 N c. 100,000 N d. 1,000,000 1028: At what angle to the isobars do surface winds blow over the open sea?
N a. About 90° N b. About 50° N c. About 25° Y d. About 15° 1069: What do the numbers on isobars indicate?
Y a. barometric pressure N b. temperature N c. rain in inches N d. wind speed 1161: What is characteristic of an occulting light?
N a. 1 sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse N b. 5 sec. flash, 5 sec. eclipse Y c. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse N d. 6 sec. flash, 6 sec. eclipse 1172: Which position shown would likely have stratus or stratocumulus clouds, occasional light drizzle, steady southerlies around 10 knots, and steady temperatures? (D049NG )
N a. B N b. C N c. D Y d. E 1187: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 016° N b. 106° Y c. 254° N d. 286° 1238: What will be the height of tide at Three Mile Harbor Entrance, Gardiners Bay, NY, at 0700 (ZD +5) on 14 Nov 1983?
N a. 1.1 feet (0.3 meters) Y b. 1.7 feet (0.5 meters) N c. 1.9 feet (0.6 meters) N d. 2.2 feet (0.7 meters) 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1283: The error in a magnetic compass caused by the vessel's magnetism is called __________.
N a. variation Y b. deviation N c. compass error N d. bearing error 1385: What is the length of the lunar day?
Y a. 24h 50m 00s N b. 24h 00m 00s N c. 23h 56m 04s N d. 23h 03m 56s 1423: Quadrantal error in a gyrocompass has its GREATEST effect __________.
N a. in high latitudes N b. near the equator N c. on north or south headings Y d. on intercardinal headings 1450: The distance between the surface of the water and the tidal datum is the __________.
N a. range of tide N b. charted depth Y c. height of tide N d. actual water depth 1452: When is the rhumb line distance the same as the great circle distance?
N a. Course 090°T in high latitudes Y b. Course 180°T when you cross the equator N c. Course 045°T in low latitudes N d. The rhumb line distance is always longer than the great circle distance. 1495: A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude?
N a. 157°E N b. 57°E Y c. 23°E N d. 57°W 1551: In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.
Y a. about 75 miles east of Ormond Beach, FL N b. close inshore between Jupiter Inlet and Fowey Rocks, FL N c. along the 50-fathom curve while off the east coast of Florida N d. about 10 miles east of Cape Canaveral, FL 1640: Clouds with the prefix "nimbo" in their name __________.
N a. are sheet or layer clouds N b. have undergone great vertical development N c. are middle or high altitude clouds Y d. are rain clouds 1646: Which picture in illustration D034NG shows a flashing light? (D034NG )
N a. A N b. B Y c. C N d. D 1696: Two well-developed high pressure areas may be separated by a __________.
N a. hill of low pressure Y b. trough of low pressure N c. valley of low pressure N d. ridge of low pressure 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1740: If you are in the dangerous semicircle of a hurricane you can expect all of the following except __________.
Y a. backing winds N b. high seas N c. high winds N d. veering winds 1763: Weather patterns in the Gulf Coast area of the United States are __________.
Y a. those of a transition zone between tropical and a temperate area N b. those of a tropical region N c. extremely hot in summer N d. tropical over Florida and subtropical over the rest of the Gulf Coast area 1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the sky overhead N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions Y d. a weather map 1824: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C in the illustration? (DO36NG )
N a. One red light N b. Two green lights Y c. Three green lights N d. No light 2182: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?
N a. No lights Y b. One red light N c. Two red lights N d. Three red lights 2216: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres out. Y b. Move the quadrantal spheres in. N c. If the spheres are in as far as possible replace them with smaller spheres. N d. If the spheres are out as far as possible replace them with smaller spheres. 2238: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are all of the way out replace them with larger spheres. N b. If the quadrantal spheres are all of the way in replace them with larger spheres. Y c. If the quadrantal spheres are all of the way in, move the spheres out. N d. If the quadrantal spheres are all of the way out, move the spheres in. 2264: The revision date of a chart is printed on which area of the chart?
N a. Top center Y b. Lower-left corner N c. Part of the chart title N d. Any clear area around the neat line 2266: It is difficult to determine which limb of the Moon is fully illuminated __________.
N a. when the Moon is low in the sky at rising or setting N b. at the new Moon phase N c. when taking Moon sights during daylight Y d. when the terminator is nearly vertical 2362: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004°. Which action should be taken?
N a. Use the Flinders bar and adjust the compass until it reads 002°. N b. Use the fore-and-aft magnets and adjust the compass until it reads 000°. Y c. Use the athwartships magnets and adjust the compass until it reads 002°. N d. Use the athwartships magnets and adjust the compass until it reads 000°. 2416: An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?
N a. Open-faced diamond Y b. Diamond with a cross N c. Circle N d. Square 2540: The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.
N a. difference in longitude N b. mid-longitude Y c. departure N d. meridian angle 2562: In the time diagram shown __________. (D005NG )
N a. the GHA of the Sun is approximately 330° Y b. your date is one day later than the date at Greenwich N c. the LHA of the Sun is approximately 120° N d. you are in west longitude 2582: You must construct a Mercator plotting sheet on a piece of paper measuring 32" by 36". The area includes latitude 31°S to 37°S and longitude 005°W to 002°E. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 4.00 inches N b. 4.11 inches N c. 4.25 inches Y d. 4.36 inches 2651: Low pressure disturbances which travel along the intertropical convergence zone are called __________.
Y a. tropical waves N b. tropical disturbances N c. permanent waves N d. tidal waves 2669: Under the IALA Buoyage System, which topmark shown will be displayed on a safe water mark? (D023NG )
Y a. A N b. B N c. C N d. D 2684: The maximum difference between mean time and apparent time is __________.
N a. equal to the longitude expressed in time units Y b. about 16 minutes N c. the difference between the GHA of mean sun and the first point of Aries N d. 15° of arc 2889: On 29 June 1981 you observe a back sight of the upper limb of the Moon. The sextant altitude (hs) is 114°16.9'. The height of eye is 36 feet, and the index error is 2.0' off the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?
N a. 66°23.8' N b. 66°04.4' N c. 66°00.4' Y d. 65°53.8' 3011: The survey information upon which a chart is based is found __________.
N a. at the top center of the next line Y b. near the chart title N c. at the lower left corner N d. at any convenient location 3078: Which data must ECDIS be able to record at one-minute intervals?
N a. Position N b. Electronic navigational chart source N c. Course made good history Y d. All of the above