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.
22: Charts showing the coast of Mexico are produced by the United States __________.
Y a. National Geospatial-Intelligence Agency N b. Coast Guard N c. Naval Observatory N d. National Ocean Service 220: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?
N a. The current is westerly at 0.5 knot. N b. You must increase speed to compensate for the current. N c. The current cannot be determined. Y d. The drift is 0.25 knot. 281: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. white light Y b. red light N c. green light N d. light characteristic of Morse (A) 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 354: In order to remove side error from a sextant, you should adjust the __________.
N a. horizon glass to make it parallel to the horizon mirror with the index set at zero N b. horizon glass to make it perpendicular to the index mirror with the index set at zero Y c. horizon glass to make it perpendicular to the sextant frame N d. telescope to make it parallel to the sextant frame 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.
N a. hs to the visible horizon Y b. hs to the sensible horizon N c. hs to the celestial horizon N d. Ho to the celestial horizon 494: Aneroid barometers are usually calibrated to indicate atmospheric pressure in __________.
N a. inches of mercury and centimeters N b. feet of mercury and millibars N c. inches of mercury and millimeters Y d. inches of mercury and millibars 505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the __________.
N a. horizontal parallax decreases N b. observer's height above sea level increases N c. humidity of the atmosphere decreases Y d. altitude of the body decreases 555: The letter D shown represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 588: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?
N a. 39 miles N b. 45 miles Y c. 53 miles N d. 59 miles 620: Chart legends which indicate a conspicuous landmark are printed in __________.
Y a. capital letters N b. italics N c. boldface print N d. underlined letters 746: Lines drawn through points on the Earth having the same atmospheric pressure are known as __________.
N a. isothermal N b. millibars Y c. isobars N d. seismics 811: Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.
Y a. should be left to port when heading out to sea N b. may be left close aboard on either side N c. is on the north side of a point of interest N d. is marking the preferred channel 879: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 346°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 328° N b. 323° N c. 318° N d. 314° 938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.
N a. turn away from the whale and leave at full speed Y b. turn away from the whale and leave at slow speed N c. slow to bare steerageway until the whale swims away N d. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away 962: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. underlined letters N b. boldfaced print N c. italics Y d. capital letters 996: Warm air masses will generally have __________.
N a. turbulence within the mass Y b. stratiform clouds N c. heavy precipitation N d. good visibility 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 1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.
Y a. front N b. isobar N c. isotherm N d. equipotential line 1130: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude N c. west Y d. east 1130: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude N c. west Y d. east 1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.
N a. divisional parts Y b. coefficients N c. fractional parts N d. equations 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 1336: On the approach of a warm front, barometric pressure usually __________.
Y a. falls N b. is steady N c. is uncertain N d. rises 1354: A ship is in longitude 54°00'W on a true course of 090°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W Y b. 52°30'W N c. 60°00'W N d. 67°30'W 1463: If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?
Y a. The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true N b. The readings are too low and the amount of the error must be subtracted from the compass to obtain true N c. The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true N d. The readings are too high and the amount of the error must be subtracted from the compass to obtain true 1480: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom N c. The vertical distance from the surface of the water to the ocean floor Y d. The vertical distance from the tidal datum to the level of the water at any time 1481: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
Y a. 18.3 nm N b. 15.4 nm N c. 13.1 nm N d. 10.3 nm 1590: Civil twilight starts at 1812 zone time on 26 August 1981, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which statement concerning the planets available for evening sights is TRUE?
N a. Mars will be near the prime vertical in the eastern sky. Y b. Venus may be identified from Saturn and Jupiter because it is the brightest. N c. Sights of Venus, Jupiter, and Saturn will yield a good three line fix. N d. A sight of either Jupiter, Saturn, or Venus will give a latitude line. 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 1631: Which picture shows an occulting light? (D034NG )
N a. A Y b. B N c. C N d. D 1646: Which picture in illustration D034NG shows a flashing light? (D034NG )
N a. A N b. B Y c. C N d. D 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 1730: If you observe the point of cloud convergence shifting to the right and the "bar" of the storm appears to move along the horizon __________.
Y a. the center of the storm will by-pass you N b. the storm will strike you on the starboard side N c. you are in the direct path of the storm and should take immediate steps to batten down loose gear N d. the storm is starting to break up 1732: The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the __________.
Y a. wall cloud N b. nimbostratus cloud N c. bar N d. funnel 2062: 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 F in the illustration? (D038NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 2143: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
Y a. Red over amber (yellow) N b. Green over amber (yellow) N c. Red over Green N d. Green over Red 2234: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres closer to the compass N b. Raise the heeling magnet if the red end is up N c. Remove some of the Flinders bar Y d. Raise or lower the athwartship magnets 2288: A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
N a. The motion of the apparent sun is along the ecliptic. Y b. Measurement of time is along the celestial equator. N c. The speed of the Earth's revolution is not constant. N d. There are variations in the Earth's rotational speed. 2351: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. running fix N b. probable position N c. fix Y d. dead-reckoning position 2426: You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.
N a. a sail vessel descending the river N b. a power-driven vessel ascending the river N c. a vessel restricted in its ability to maneuver crossing the river Y d. All of the above 2442: 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°. You should now adjust the compass until it reads __________.
N a. 356° N b. 358° N c. 000° Y d. 002° 2460: You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?
N a. 016° N b. 074° N c. 090° Y d. 254° 2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.
N a. black Y b. red N c. green N d. yellow 2490: A vertex of the navigational triangle is NOT located at the __________.
N a. elevated pole N b. celestial body N c. zenith Y d. coaltitude 2500: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.
Y a. for inaccuracies in the reference level N b. the equivalent reading at the center of the body N c. the equivalent reading from the center of the Earth N d. the bending of the rays of light from the body 2530: The distance between any two meridians measured along a parallel of latitude __________.
N a. increases in north latitude and decreases in south latitude N b. decreases as DLO increases N c. increases with increased latitude Y d. decreases with increased latitude 2569: The mean sun used to measure time moves __________.
N a. along the ecliptic at 15° per hour N b. along the celestial equator at 15° per day N c. along the ecliptic at 15° per day Y d. along the celestial equator at 15° per hour 2646: During daylight savings time the meridian used for determining the time is located farther __________.
Y a. east N b. west N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 2658: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45°N and latitude 49°N?
N a. 33.1 inches N b. 33.3 inches Y c. 33.6 inches N d. 33.9 inches 2739: A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated by what letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2766: In low latitudes, the high(s) of the diurnal variation of pressure occur(s) at __________.
N a. noon N b. noon and midnight Y c. 1000 and 2200 N d. 1600 2923: You should plot your dead reckoning position __________.
N a. from every estimated position Y b. from every fix or running fix N c. every three minutes in pilotage waters N d. only in pilotage waters 3018: You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?
N a. 013° N b. 178° Y c. 256° N d. 342° 3033: A navigator fixing a vessel's position by radar __________.
Y a. can use radar information from one object to fix the position N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon N d. must use information from targets forward of the beam 3083: Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?
N a. Five Y b. Four N c. Three N d. Two 3089: As a licensed Merchant Marine Officer you are expected to __________.
N a. obtain a weather forecast before setting out from port N b. listen to weather forecasts on the radio while enroute N c. understand all broadcast weather warning information Y d. All of the above 3093: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 4 hours N b. 6 hours Y c. 12 hours N d. 24 hours 3114: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?
N a. Rate of turn N b. Latitude and longitude N c. Navigational status Y d. All of the above