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 white buoy with an open-faced orange diamond on it indicates（）.
How is the intensity of a light expressed in the Light Lists?（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
Branford reef is（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A spherical buoy may be（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A white buoy with an orange rectangle on it displays（）.