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
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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
A.A safe-water buoy will display red and white vertical stripes of reflective material
B.All reflective material is white because it is the most visible at night
C.A special-purpose mark will display either red or green reflective material to agree with its shape
D.A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
A.a hard sand shoal marked with a light
B.completely submerged at all stages of the tide
C.surrounded by rocks awash at low water spring tides
D.a small，low，sandy islet surrounded by shoal water
最新試題
A white buoy with a blue band is（）.
A yellow buoy may mark a(n)（）.
Buoys which mark isolated dangers are painted with alternating（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A white buoy with an open-faced orange diamond on it indicates（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
From your position you observe a rotating white and green light to the north. This light is most likely（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A preferred-channel buoy may be（）.
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（）.