Your chart indicates that there is an isolated rock and the rock is named in vertical letters. This indicates the ______.

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• Chart legends which indicate a conspicuous landmark are printed in（）.

  A . capital letters B . italics C . boldface print D . underlined letter

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• The irregular black line around a charted light such as Race Rock Light indicates that it is （）.

  A . unwatched B . surrounded by riprap C . a minor light D . constructed on an artificial island

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• Which chart symbol indicates the bottom is clay（）.

  A、Cly B、Cla C、Cl D、C

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• The compass rose on a nautical chart indicates both variation and （）.

  A、deviation B、annual rate of variation change C、precession D、compass error

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• The buoy symbol printed on your chart is leaning to the northeast. This indicates （）.

  A . you should stay to the north or east of the buoy B . you should stay to the west or south of the buoy C . the buoy is a major lighted buoy D . nothing special for navigational purpose

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• Solid green arrows on the main body of a pilot chart indicate （）.

  A . prevailing wind directions B . prevailing ocean current directions C . probable surface current flow D . shortest great circle route

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• How is variation indicated on a small-scale nautical chart?（）.

  A . Magnetic compass table B . Magnetic meridians C . Isogonic lines D . Variation is not indicated on small-scale nautical chart

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• You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.

  A . White buoy with a green top B . White and international orange buoy C . Yellow buoy D . Yellow and black vertically-striped buoy

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• You can indicate that your vessel is in distress by（）.

  A . displaying a large red flag B . displaying three black balls in a vertical line C . sounding four or more short rapid blasts on the whistle D . continuously sounding the fog whistle

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• Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.

  A . Expect to see cirrus clouds followed by altostratus and nimbostratus clouds B . Alter course to remain in the navigable semicircle C . Prepare for gusty winds，thunderstorms，and a sudden wind shift D . Expect clear weather，with steady winds and pressure，until the front passe

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• On a nautical chart，the inner ring of a compass rose indicates（）.

  A、true directions B、compass error C、deviation D、magnetic directions

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• The agonic line on an isomagnetic chart indicates the （）.

  A . magnetic equator B . magnetic longitude reference line C . points where there is no variation D . points where there is no annual change in variatio

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• The numeral in the center of a wind rose circle on a pilot chart indicates the （）.

  A . total number of observations B . average wind force on the Beaufort scale C . average wind force in knots D . percentage of calm

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• Isogonic lines are lines on a chart indicating （）.

  A . points of equal variation B . points of zero variation C . the magnetic latitude D . magnetic di

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• What indicates that a tropical cyclone may be within 500 to 1，000 miles of your position?（）

  A . A pumping of the barometer up and down a few millibars B . A sudden wind shift from southwest to northwest followed by steadily increasing winds C . The normal swell pattern becoming confused，with the length of the swell increasing D . An overcast sky with steadily increasing rain from nimbostratus cloud

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• 153. On a nautical chart, the inner ring of a compass rose indicates ______.

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• 25. Which chart abbreviation indicates the bottom is clay?______

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• 58．Which chart symbol indicates the bottom is clay?

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• 131. How is variation indicated on a small-scale nautical chart?

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• 26. Which chart abbreviation indicates the bottom is rock?______

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• 246. ____indicates the date when this chart was partly or completely revised and published.

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• 27. Which chart abbreviation indicates the bottom is coral?______

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• 119. On a nautical chart, the inner ring of a compass rose indicates _____.

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• 169. How is variation indicated on a small-scale nautical chart? ______

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