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 rock and sand structure extending from the bank of the river toward the channel is known as a（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A spherical buoy may be（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
Buoys which mark isolated dangers are painted with alternating（）.
A yellow buoy may exhibit a(n)（）.