The First 18 I KNOW It is equipped with a system that greatly facilitates the use of the asymmetric spi on the boat, especially shipping and drop: sail is stored flat on deck, with a spi lowering system, combined with a single maneuver that serves as both a halyard and a lowering line. Before installing the sail, put the boat smooth sailing, preferably starboard tack and make sure that no object can damage the spi when it enters the lowering system. Good navigation!