单选题A racetrack turn would be better than a Williamson turn in recovering a man overboard if （）.Athe man has been missing for a period of timeBthe sea water is very cold and the man is visibleCthere is thick fogDthe wind was from astern on the original course
单选题
A racetrack turn would be better than a Williamson turn in recovering a man overboard if （）.
A
the man has been missing for a period of time
B
the sea water is very cold and the man is visible
C
there is thick fog
D
the wind was from astern on the original course
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