Designed by Hubbard and first launched in 1964, this lightweight catamaran represents an early entry into the small multihull market. Built by Mobjack Manufacturing Corp. using fiberglass construction, the Sea Lion 18 features twin centerboards and a fractional sloop rig with a rotating spar system that enhances sailing efficiency. At just 300 pounds displacement with 137 square feet of sail area, this cat delivers impressive performance characteristics. The high sail area to displacement ratio of 48.96 indicates exceptional light-air performance and speed potential, making it well-suited for day sailing, recreational racing, and sailing instruction. The shallow 2-foot draft opens up skinny water exploration opportunities that monohulls simply cannot access. The twin centerboard configuration provides good upwind performance while maintaining the ability to beach the boat easily. With its 7.5-foot beam providing stability and the rotating spar system offering aerodynamic advantages, the Sea Lion 18 appeals to sailors seeking an affordable entry into catamaran sailing or those wanting a fast, responsive boat for coastal waters. The compact 18-foot length makes it trailerable and manageable for single-handed sailing, though the catamaran's speed and responsiveness reward skilled boat handling.

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