Bosun’s chairs

Bosun’s chairs. The seat is attached to a line led upwards to a block and tackle suspended from either a mast head, or a yard or boom. One sits on the seat and the line is hauled upwards, causing the chair and its occupant to rise. The device is used on a modern boat to haul a person up the mast, when repairing, checking or installing equipment on it. In these cases, the chair’s tether is secured to the main halyard and the rope is wound around the winch used to haul up a sail.

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