HM Coastguard is primarily（）for the initiation and co-ordination of civil maritime SAR operations in the UK.

Generally，you can best keep a vessel under steering control when the vessel has（）.

A.Headway
B.Sternway
C.No way on，with engines stopped
D.No way on，with engines full ahead

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Generally speaking，the most favorable bottom for anchoring is（）.

A.Very soft mud
B.Rocky
C.A mixture of mud and clay
D.Loose sand

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