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
A nun buoy will（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
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 marking a danger area will have what symbol on it?（）
A relative bearing is always measured from（）.
A white buoy with a blue band is（）.
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
How is the intensity of a light expressed in the Light Lists?（）.