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
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A nun buoy will（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A yellow buoy may mark a(n)（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A mid-channel buoy，if lighted，will show a（）.
A yellow buoy may exhibit a(n)（）.