单项选择题

What indicates a dual purpose buoy? （）

A.Red buoy with a horizontal yellow band
B.Red and white vertically-striped buoy with a vertical yellow stripe
C.Red and white vertically-striped buoy with a red spherical topmark
D.Green buoy with a yellow square

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热门试题

单项选择题

What describes an accurate position that is NOT based on any prior position? （）

A.Dead-reckoning position
B.Estimated position
C.Fix
D.Running fix

单项选择题

Uncharted lights，fog signals and radar beacon transmissions may be（）near the station.

A.encountered
B.met
C.contacted
D.seen