Boom hoist :

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Taking advantage of a simple pulley at the end of the boom a quick rig can be set up to hoist loads over the lifelines to the boat deck.
One RopeTie is all that's needed to provide a 3 to 1 mechanical advantage and to relieve the hoisting effort by retaining the load when the line is released.
In this example a kayak is hoisted with good control and little exertion. With one end over the lifelines one person can easly swing the other end over - an operation that normally would require two people.