单项选择题 The rotating unit of a spilt windlass consists of a（） with shaped snugs to grip the anchor cablea mooring drum for paying out or letting go of mooring wires and warp end for warping duties.

单项选择题 Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.

单项选择题 The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）