Jumpers (or jumper stays) represent a set of specialized rigging wires and small struts located near the top of a mast. Their purpose is to provide forward support and rigidity to the upper section of the mast, preventing it from bending backward under the load of the sails. This is especially common on masts with ‘fractional rigs’ or those that carry large, high-aspect mainsails. One specific example involves a rigger adjusting the tension on the jumper stays to ensure the masthead stays straight during a race. By stabilizing the top of the mast, jumpers allow the sailor to maintain better control over the sail’s ‘twist’ and power. While they add some weight and complexity aloft, they are vital for the structural integrity of high-performance rigs. They act as a localized reinforcement for the mast’s most vulnerable section.
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