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 preferred-channel buoy will show a（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
A white buoy with an open-faced orange diamond on it indicates（）.
Buoys which mark dredging areas are painted（）.
An orange and white buoy with a rectangle on it displays（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A spherical buoy may be（）.
A parallel of latitude other than the equator is a（）.