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.
2: On an isomagnetic chart, the line of zero variation is the __________.
N a. zero variation line N b. isogonic line N c. variation line Y d. agonic line 31: When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.
Y a. light characteristic N b. color of the uppermost band N c. shape of an unlighted buoy N d. color of the light 38: When navigating a vessel, you __________.
N a. can always rely on a buoy to be on station N b. can always rely on a buoy to show proper light characteristics N c. should assume a wreck buoy is directly over the wreck Y d. should never rely on a floating aid to maintain its exact position 62: Charted depth is the __________.
N a. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide Y b. vertical distance from the chart sounding datum to the ocean bottom N c. average height of water over a specified period of time N d. average height of all low waters at a place 109: While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown bearing 053°T. What action should you take? (D021NG )
N a. Alter course to 053° and leave the buoy close aboard on either side N b. Maintain course Y c. Alter course to 060° and ensure that the true bearings decreases N d. Alter course to port to rapidly open the bearing to the right 125: The GMT is 0445 and your zone description is +1. Your zone time is __________.
N a. 0445 Y b. 0345 N c. 0545 N d. 1545 146: What change in the wind direction could be expected at position "D" if the low were moving northeasterly? (D049NG )
Y a. Veering to the west N b. Backing to the north N c. Veering to the north N d. Backing to the east 212: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station N b. Radar transponder beacon N c. Radio beacon Y d. Aero light 307: The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.
N a. 60°W N b. 75°W Y c. 90°W N d. 105°W 371: Which buoy may be odd numbered?
N a. Mid-channel buoy N b. Unlighted nun buoy Y c. Lighted green buoy N d. All of the above 376: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the __________.
N a. northeast N b. west-southwest N c. northwest Y d. south-southeast 492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth?
N a. Lambert conformal Y b. Oblique gnomonic N c. Mercator N d. Transverse conic 546: If it is impossible to avoid a hurricane in the Northern Hemisphere, the most favorable place to be when the storm passes is in __________.
N a. the dangerous semicircle N b. the eye (center) of the storm N c. that half of the storm lying to the right of the storm's path Y d. that half of the storm lying to the left of the storm's path 549: On a working copy of a weather map, an occluded front is represented by which color line?
N a. Red N b. Blue N c. Alternating red and blue Y d. Purple 563: Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?
N a. 313° N b. 314° Y c. 316° N d. 317° 799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. green can buoy N b. red can buoy Y c. green conical buoy N d. red conical buoy 832: What is the most important source of information to be used in correcting charts and keeping them up to date?
N a. Fleet Guides Y b. Notice to Mariners N c. Sailing Directions N d. Pilot Charts 890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?
N a. Rhythm N b. Period Y c. Intensity N d. Color 896: The wind direction around a low pressure area in the Northern Hemisphere is __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and inward N d. counterclockwise and outward 916: Stormy weather is usually associated with regions of __________.
Y a. low barometric pressure N b. high barometric pressure N c. steady barometric pressure N d. changing barometric pressure 936: A cyclone in its final stage of development is called a(n) __________.
N a. tornado N b. anticyclone Y c. occluded cyclone or occluded front N d. polar cyclone 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 1072: What is the approximate geographic range of Assateague Light, VA, if your height of eye is 52 feet (15.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 14.1 nm N b. 21.8 nm Y c. 23.0 nm N d. 50.2 nm 1073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. inconspicuous N b. a radio transmitter Y c. conspicuous N d. a government facility or station 1083: Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________.
N a. induced magnetism in the vessel's horizontal soft iron N b. change in the magnetic field when the vessel inclines from vertical Y c. permanent magnetism of the vessel N d. magnetic fields caused by electrical currents in the vicinity 1098: A chart position enclosed by a square is a(n) __________.
N a. fix Y b. estimated position N c. dead reckoning position N d. running fix 1162: A line connecting all possible positions of your vessel at any given time is a __________.
N a. longitude line N b. latitude line Y c. line of position N d. fix 1217: What will be the velocity and direction of the tidal current at Old Ferry Point, NY, at 1340 EST (ZD +5) on 5 February 1983?
N a. 0.8 knot at 060°T N b. 0.8 knot at 240°T N c. 1.0 knot at 076°T Y d. 1.4 knots at 076°T 1229: The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?
N a. 063.8°T Y b. 116.2°T N c. 243.8°T N d. 296.2°T 1295: The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.
N a. cloud movement N b. vessel heading Y c. waves N d. swells 1308: On a voyage from Cape Town to London, the favorable ocean current off the coast of Africa is the __________.
N a. Canary Current Y b. Benguela Current N c. Agulhas Current N d. South Atlantic Current 1343: Variation is a compass error that you __________.
N a. can correct by adjusting the compass card N b. can correct by adjusting the compensating magnets N c. can correct by changing the vessel's heading Y d. cannot correct 1358: Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.
N a. drop in barometric pressure Y b. drop in temperature N c. wind shift N d. squall line 1375: The Moon rises earlier on succeeding days when the __________.
N a. retardation effect of the revolution of the Moon is greater than the effect due to change of declination Y b. effect due to change of declination is larger than that due to revolution N c. the revolution effect and the declination effect act in the same direction N d. the Moon is on the equator and the revolution effect is at a maximum 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 1460: What is the major advantage of a rhumb line track?
Y a. The vessel can steam on a constant heading (disregarding wind, current, etc.). N b. The rhumb line is the shortest distance between the arrival and departure points. N c. It is easily plotted on a gnomonic chart for comparison with a great circle course. N d. It approximates a great circle on east-west courses in high latitudes. 1470: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates a hurricane? (D042NG )
N a. M N b. I N c. L Y d. K 1512: You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?
N a. The arc should be converted into a straight line using offsets and then run forward. N b. An arc should never be run forward. Y c. The position of the object observed should be advanced to the new time and a new arc swung using the radius of the old arc. N d. The distance between LOP's should be added to the radar range and a new arc swung. 1598: A slow, gradual fall of the barometer indicates approaching __________.
N a. gale force winds within 12 hours N b. blizzard conditions Y c. deteriorating or unsettled weather N d. heavy, wind driven rain 1610: When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?
Y a. Red lights N b. Three white lights in a vertical line N c. Red lights on the LDB and green lights on the RDB N d. Yellow lights 1619: Sextant A reads __________. (D043NG )
Y a. 29°42.7' N b. 29°45.7' N c. 29°51.8' N d. 30°47.2' 1653: In a weather report, the term "visibility" expresses __________.
N a. how far you can see with the "naked eye" N b. how far you can see with a telescope or binoculars N c. how well you can identify an object at night Y d. the distance in miles at which prominent objects are identifiable 1695: Compared to a low pressure system, generally the air in a high is __________.
N a. warmer, less dense, and less stable Y b. cool, more dense, and drier N c. muggy and cloudy N d. extremely moist with high relative humidity 1744: Which condition suggests that your present position lies in the navigable semicircle of a tropical storm?
Y a. A backing wind N b. A veering wind N c. Sustained gale force winds N d. A strong wind that maintains a constant speed and direction 1749: If the current and wind are in opposite directions, the sea surface represents __________.
N a. a greatly reduced wind speed Y b. a higher wind speed than what really exists N c. a lower wind speed than what really exists N d. more turbulent winds 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1782: You are on course 027°T and take a relative bearing to a lighthouse of 220°. What is the true bearing to the lighthouse?
N a. 113° N b. 193° Y c. 247° N d. 279° 1916: The prime vertical is the reference point from which the angle of which type of observation is measured?
N a. Sextant angle N b. Azimuth Y c. Amplitude N d. Local apparent noon 1916: The prime vertical is the reference point from which the angle of which type of observation is measured?
N a. Sextant angle N b. Azimuth Y c. Amplitude N d. Local apparent noon 1930: The phase correction should be applied to sights of Venus and Mars __________.
N a. during day time observations only Y b. during twilight observations only N c. at all times N d. when observed at altitudes of less than 25° 1974: Ocean currents are well defined and __________.
N a. create large waves in the direction of the current N b. change direction 360° during a 24 hour period Y c. remain fairly constant in direction and velocity throughout the year N d. are characterized by a light green color 2081: 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. 30° N b. 45° N c. 60° Y d. 90° 2128: 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 B if the lock walls and piers are not awash?
Y a. Three red lights N b. Two red lights N c. One red lights N d. No lights 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 2478: On 23 August 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 116°42.8'. The height of eye is 56 feet and the index error is 2.0' on the arc. What is the observed altitude (Ho)?
Y a. 63°42.0' N b. 63°38.0' N c. 63°19.4' N d. 62°49.6' 2546: A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________.
Y a. dike N b. revetment N c. cutoff N d. crib 2548: On the Mississippi River, gage zero is the gage reading measured from the __________.
Y a. National Geodetic Vertical Datum N b. low water reference plane N c. the lowest recorded river depth N d. the highest recorded river depth 2986: Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?
N a. 1052, 9 January Y b. 0852, 10 January N c. 1052, 10 January N d. 1052, 11 January 3052: The Sailing Directions contain information on __________.
N a. required navigation lights N b. lifesaving equipment standards N c. casualty reporting procedures Y d. currents in various locations 3122: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to ___.
N a. 96 characters Y b. 158 characters N c. 256 characters N d. 384 characters