Catamaran has one hull acting as a boom for the sail on the windward side with a mainsheet from the upper part of the sailing rig to the boom hull to counteract forces on the mast foot
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Outrigger structure for a boat has support frames for the outrigger spars held in place by stays and a block and tackle in the lightweight assembly which takes up the push and pull forces
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Keel system for an outrigger boat has two keel blades on end swing mountings at the leeward side of the hull with a coupling for simultaneous manual operation
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Rudder system for outrigger boats
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Rig for boat with outrigger - has mast stayed to hull on lee side and to outrigger on weather side
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Sheet-guide for slewing triangular sail - has two identical tackles and endless rope reeved via blocks at ends of bottom boom, with tackle blocks travelling opposite ways along boom
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Sail
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Stop valve with sealing hose which is inserted over - has inner pipe closed by compressing elastic hose over outlet opening
