"Regatta One-Design", manufactured and sold by Matt Jacobsen of Burbank, CA. Originally one of the several similar sized hulls that were grouped into a preliminary, formative EC-12 Class until the decision was made to make the EC-12 a one-design. As a stand alone class the Regatta O/D got up to about 30 or so boats before being eclipsed by the EC-12. Matt later produced a Magnum 54, another attempt at a one design class, but 4" longer than the M class. Anyone with a Regatta O/D that is thinking of updating and renovation, I have sail plan information and probably some more details on the boat in the archives, somewhere here. Rod Carr