A.black
B.yellow
C.green
D.red
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你可能感興趣的試題
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
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（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A mid-channel buoy，if lighted，will show a（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A white buoy with a blue band is（）.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A special purpose buoy shall be（）.
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）