A.Entrance buoy
B.New buoy
C.Port buoy
D.Cardinal buoy
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A.wingdam
B.towhead
C.cutoff
D.landwall
A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
A.white light whose characteristic is Morse (A)
B.group-occulting white light
C.composite group-flashing (2 + 1) white light
D.composite group-flashing (2 + 1) red or green light
A.lettered
B.spherical
C.showing a white light
D.All of the above
A.the equator
B.a great circle
C.a small circle
D.a meridian
最新試題
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A special purpose buoy shall be（）.
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
A preferred-channel buoy may be（）.
A parallel of latitude other than the equator is a（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A mid-channel buoy，if lighted，will show a（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）