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
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
How is the intensity of a light expressed in the Light Lists?（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
Buoys which mark dredging areas are painted（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A mid-channel buoy，if lighted，will show a（）.
A spherical buoy may be（）.
A parallel of latitude other than the equator is a（）.