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
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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
A.directions
B.distances
C.locations
D.All of the above
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Rectangle
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
最新試題
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（）.
Branford reef is（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A preferred-channel buoy will show a（）.
A mid-channel buoy，if lighted，will show a（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A yellow buoy may exhibit a(n)（）.
From your position you observe a rotating white and green light to the north. This light is most likely（）.
A white buoy with an open-faced orange diamond on it indicates（）.
Buoys which mark dredging areas are painted（）.