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Use these blocks to create a 3:1 hoisting system to raise overboard crew out of the water and back on to the boat. Included carabiner hooks on to COB’s harness or West Marine Lifesling attachment point. L Ine should be of sufficient length to put the upper block 10' above the upper-most life line or hand rail. Aided by a winch, this arrangement enables a single crewmember to recover a COB. Line sold separately.
