A.danger
B.vessels are excluded from the area
C.the buoy is a mooring buoy
D.operating restrictions are in effect
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A.an isolated danger mark
B.a hydrographic data collection buoy
C.a mooring buoy
D.marking a restricted area
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
最新試題
Branford reef is（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A yellow buoy may exhibit a(n)（）.
An orange and white buoy marking a danger area will have what symbol on it?（）
Buoys which mark isolated dangers are painted with alternating（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A relative bearing is always measured from（）.
A white buoy with a blue band is（）.
Buoys which mark dredging areas are painted（）.
A yellow buoy may mark a(n)（）.