单项选择题

A man was sighted as he fell overboard. After completing a Williamson turn，the man is not sighted. What type of search should be conducted?（）

A.Expanding circle
B.Sector search
C.Parallel track pattern
D.Datum-drift search

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单项选择题（）the visibility to reduce to one mile by heavy rain，it（）be impossible to rescue the vessel in distress.

A.Was／would
B.Were／would
C.Is／will
D.Is／is to

If more than one raft is manned after the vessel has su...

单项选择题If more than one raft is manned after the vessel has sunk，you should（）.

A.go in a different direction in search of land
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Physical exertion on the part of a person who has falle...

单项选择题Physical exertion on the part of a person who has fallen into cold water would（）.

A.be the best thing to try if there was no rescue in sight
B.increase survival time in the water
C.increase the rate of heat loss from the body
D.not affect the heat loss from the body

搜索用语

A man was sighted as he fell overboard. After completing a Williamson turn，the man is not sighted. What type of search should be conducted?（）