单项选择题

The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the（）.

A.General commander
B.Commander general
C.Search commander
D.On-scene commander

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Stop search and return to（）.A.keelB.virginC.originD.bas...

单项选择题Stop search and return to（）.

A.keel
B.virgin
C.origin
D.base

The International Regulations for Preventing Collisions...

单项选择题The International Regulations for Preventing Collisions at Sea（）while carrying out search and rescue operation.

A.apply fully
B.apply half
C.apply in part
D.not apply

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