A.red and black bands
B.green and black bands
C.red and white stripes
D.green and white bands
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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
A.directions
B.distances
C.locations
D.All of the above
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Rectangle
最新試題
A preferred-channel buoy may be（）.
An orange and white buoy with a rectangle on it displays（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
How is the intensity of a light expressed in the Light Lists?（）.
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A spherical buoy may be（）.
Buoys which mark dredging areas are painted（）.
Buoys which mark isolated dangers are painted with alternating（）.
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（）.