A.removed
B.altered
C.corrected
D.converted
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A.always be nearer to the equator
B.always be nearer to the elevated pole
C.be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere
D.be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions
A.Flashing
B.Quick flashing
C.Composite group flashing
D.Equal interval (isophase)
A.red and black bands
B.green and black bands
C.red and white stripes
D.green and white bands
A.black
B.yellow
C.green
D.red
A.A safe-water buoy will display red and white vertical stripes of reflective material
B.All reflective material is white because it is the most visible at night
C.A special-purpose mark will display either red or green reflective material to agree with its shape
D.A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
最新試題
An orange and white buoy marking a danger area will have what symbol on it?（）
A parallel of latitude other than the equator is a（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A yellow buoy may mark a(n)（）.
A preferred-channel buoy may be（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.