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)
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.