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How to use rigging block& marine pulleys
2011-09-01 16:28:40
Boatyards use rigging to lift and lower boats, marine engines and equipment. This rigging is also used to pull laterally when positioning heavy objects. Some launch facilities continue to use block-and-tackle rigging to hoist craft in and out of the water. Rigging blocks and marine pulleys can be arranged in several ways, depending on the job to be done and the mechanical advantage