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單項選擇題

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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單項選擇題

A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）

A.Flashing
B.Morse A
C.Equal interval
D.Occulting

單項選擇題

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

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