单项选择题
A special purpose buoy shall be（）.
A.lighted with a white light
B.striped black and red
C.lighted with a red light
D.yellow
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相关考题
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单项选择题
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A.Flashing
B.Morse A
C.Equal interval
D.Occulting -
单项选择题
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
A.Entrance buoy
B.New buoy
C.Port buoy
D.Cardinal buoy -
单项选择题
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A.wingdam
B.towhead
C.cutoff
D.landwall
