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 plane that cuts the Earth’s surface and passes through the poles will always form（）.
A preferred-channel buoy will show a（）.
A yellow buoy may exhibit a(n)（）.
A relative bearing is always measured from（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
An orange and white buoy with a rectangle on it displays（）.
A nun buoy will（）.
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.