A.Flashing
B.Morse A
C.Equal interval
D.Occulting
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A.Entrance buoy
B.New buoy
C.Port buoy
D.Cardinal buoy
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
最新試題
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
Except for N-S courses，and E-W courses on the equator，a great circle track between two points，when compared to a rhumb line track between the same two points，will（）.
A mid-channel buoy，if lighted，will show a（）.
A yellow buoy may exhibit a(n)（）.
A nun buoy will（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A preferred-channel buoy may be（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
How would you pass a red buoy in the maritime buoyage system “A”? （）