A.black
B.yellow
C.green
D.red
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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
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
最新試題
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A white buoy with an open-faced orange diamond on it indicates（）.
A yellow buoy may exhibit a(n)（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
Buoys which mark isolated dangers are painted with alternating（）.
A parallel of latitude other than the equator is a（）.
A white buoy with an orange rectangle on it displays（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
An orange and white buoy marking a danger area will have what symbol on it?（）