单项选择题 The （） in the steering gear system provides the force.

单项选择题 The cable lifter, mooring drum and warp end of a split windlass may be separately engaged or disengaged means of a （）

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.