A.pilot charts
B.Notices to Mariners
C.Tide Tables
D.Current Tables
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A.are sheet or layer clouds
B.have undergone great vertical development
C.are middle or high altitude clouds
D.are rain clouds
A.as a mass of warm，humid air rises into the atmosphere and cools，condensing moisture into small droplets
B.as winds blow across bodies of water，the sun causes the moisture to be absorbed and move upward forming clouds
C.dry air compresses moisture from the atmosphere into clouds
D.when the relative humidity of the atmosphere is low
A.high pressure fluid accumulators
B.driving air-powered plunger pumps
C.filling open-circuit breathing systems
D.bladder-type accumulators
A.Sailing Directions
B.Light List
C.List of Private Aids
D.Aids to Navigation Manual
A.radio time signal
B.comparison with a timepiece of known error
C.applying the prevailing chronometer rate to previous readings
D.All of the above
最新試題
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
Considering the general circulation of the atmosphere，the wind system between latitudes 30°N and 60°N is commonly called the（）.
Deficient oxygen content inside a chain locker can be detected with（）.
Control of fire should be addressed（）.
Chart legends which indicate a conspicuous landmark are printed in（）.
Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
Corrosive liquids and acids should have which kind of label?（）
Clean air standards referred to as “Grade D” apply to compressed air for use in（）.
Chronometer error may be found by（）.