A.relative bearing
B.range line
C.track line
D.estimated position
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A.painted color
B.light color and phase characteristic
C.type of structure
D.All of the above
A.fixed red light
B.Morse (A) white light
C.composite group-flashing light
D.yellow light
A.flashing
B.pulsating
C.occulting
D.alternating
A.switching
B.alternating
C.oscillating
D.fluctuating
A.sharp turn in the channel
B.narrowing in the channel at that point
C.junction in the channel
D.obstruction that must be left to port
最新試題
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A parallel of latitude other than the equator is a（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A yellow buoy may exhibit a(n)（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）