Catalina 30 We’d wager that it would be a challenge to find a harbor of any size in America without a Catalina 30 hanging either on a mooring or berthed in a slip. In an age when Americans wanted to go sailing and could afford to do so, this modest-sized sloop launched voyaging dreams by the thousands. Literally. The 30 came in Mark I, II, and III versions and had the longest production run—1975 to 2006—ever. More than 6,500 hulls were launched by the California builder of the same name.