A.gnomonic curve
B.small circle
C.meridian
D.great circle
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A.relative bearing
B.range line
C.track line
D.estimated position
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
最新試題
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A yellow buoy may mark a(n)（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A relative bearing is always measured from（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
An orange and white buoy with a rectangle on it displays（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A preferred-channel buoy will show a（）.
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.