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單項(xiàng)選擇題

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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單項(xiàng)選擇題

Stop search and return to（）.

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

單項(xiàng)選擇題

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