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
How is the intensity of a light expressed in the Light Lists?（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
An orange and white buoy with a rectangle on it displays（）.
A yellow buoy may mark a(n)（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A mid-channel buoy，if lighted，will show a（）.