A.numbered
B.lettered
C.green
D.red
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A.lighted with a white light
B.striped black and red
C.lighted with a red light
D.yellow
A.Flashing
B.Morse A
C.Equal interval
D.Occulting
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
最新試題
Buoys which mark isolated dangers are painted with alternating（）.
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 vessel is（）when she is not at anchor，made fast to the shore，or aground.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A white buoy with a blue band is（）.
A special purpose buoy shall be（）.
A yellow buoy may mark a(n)（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.