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單項選擇題

A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.

A.riding pawl
B.buckler
C.devil's claw
D.locking ring

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單項選擇題

A stage should only be rigged（）.

A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside

單項選擇題

A snatch block is a（）.

A.block used only with manila rope
B.chock roller
C.hinged block
D.strong block used for short，sharp pulls