Mainsail reefing systems must operate effciently to reduce sail under adverse conditions and provide proper sail shape when reefed. These systems are a must for both racers and cruisers.

Typical Boat Length:
Small Boat: 22' - 28' (6.7 - 8.5 m)
Midrange: 29' - 34' (8.8 - 10.4 m)
Big Boat: 35' - 42' (10.7 - 12.8 m)

Dual Line This dual-line system is common on boats 30 ft (9 m) and larger. Position blocks so line pulls down and out to keep the sail flat and prevent lateral loads on the luff rope or luff sliders. Diagram Ref. Description Small Boat Part No. Midrange Part No. Big Boat Part No. A Cheek 2644 6237 3220 B Single 2650 2600 3215 C Mastbase block 222 1986 1988 D Bullseye 339 237 237

Lazy Jacks Lazy Jacks contain mainsails during reefing and dousing. They work exceptionally well with full-battened mains, but are also used with conventional sails. Diagram Ref. Description Small Boat Part No. Midrange Part No. Big Boat Part No. A Lazy Jack Kit 252 253 254

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