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 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（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A preferred-channel buoy may be（）.
A preferred-channel buoy will show a（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A nun buoy will（）.
Buoys which mark dredging areas are painted（）.