A.from a submarine on the surface
B.the light at Southeast Point
C.at an airport
D.on a coastal patrol vessel
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A.removed
B.altered
C.corrected
D.converted
A.always be nearer to the equator
B.always be nearer to the elevated pole
C.be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere
D.be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions
A.Flashing
B.Quick flashing
C.Composite group flashing
D.Equal interval (isophase)
A.red and black bands
B.green and black bands
C.red and white stripes
D.green and white bands
A.black
B.yellow
C.green
D.red
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A spherical buoy may be（）.
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A yellow buoy may mark a(n)（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A white buoy with an orange rectangle on it displays（）.
Except for N-S courses，and E-W courses on the equator，a great circle track between two points，when compared to a rhumb line track between the same two points，will（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A white buoy with a blue band is（）.
A mid-channel buoy，if lighted，will show a（）.