单项选择题
An orange and white buoy marking a danger area will have what symbol on it?（）
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
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相关考题
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单项选择题
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square -
单项选择题
A yellow buoy may mark a(n)（）.
A.wreck
B.shoal area
C.anchorage area
D.middle ground -
单项选择题
A yellow buoy may exhibit a(n)（）.
A.fixed red light
B.flashing light
C.white light
D.occulting light
