A.an isolated danger mark
B.a hydrographic data collection buoy
C.a mooring buoy
D.marking a restricted area
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A.submerged rock，not dangerous to navigation
B.sunken wreck，not dangerous to navigation
C.towed-under buoy
D.All of the above
A.underway
B.making way
C.dead in the water
D.a power driven vessel
A.dike
B.revetment
C.cutoff
D.crib
A.numbered
B.lettered
C.green
D.red
A.lighted with a white light
B.striped black and red
C.lighted with a red light
D.yellow
最新試題
A mid-channel buoy，if lighted，will show a（）.
Branford reef is（）.
Buoys which mark dredging areas are painted（）.
A white buoy with an orange rectangle on it displays（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A preferred-channel buoy may be（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A nun buoy will（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.