单项选择题
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
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单项选择题
A shepherd’s crook is used to（）.
A.lower spring buoys into the water
B.find an anchor after the buoy has been lost
C.transfer a pennant wire to the anchor handling boat
D.clean chain as it is hauled into the rig -
单项选择题
A sheepshank is used to（）.
A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line -
单项选择题
A serving mallet is used in（）.
A.covering wire or fiber rope
B.forcing fids into a line
C.dogging hatches
D.splicing lines
