Cal sailboats: an ocean-racing pedigree built at Jensen Marine
Cal sailboats trace back to a single design partnership: builder Jack Jensen and naval architect C. William "Bill" Lapworth, working together at Jensen Marine in Costa Mesa, California. That partnership produced the Cal 40, a boat whose fin keel and spade rudder reset what an ocean racer looked like, and a wider line of racer-cruisers built and rebuilt across four decades of shifting corporate ownership before the marque went quiet in 1989.
Origins and ownership
Jensen and Lapworth decided to name their new line of small yachts "Cal." The first, the Cal 24 — Jensen's first boat — launched in 1959; Jensen originally wanted to call it the "Lapworth 24," but Lapworth had already designed a different 24-footer for someone else, so a new name was needed. The Lapworth-Jensen team then produced a 20, a 30, and a 28 before arriving at the Cal 40 in 1963, a boat Practical Sailor describes as a distillation of Lapworth's design thinking to that point; Jensen Marine also built 1,900 Cal 20s between 1961 and 1972. Bangor Punta Corporation, a Fortune 500 conglomerate that also owned O'Day Yachts and Prindle Catamarans, bought Jensen Marine in 1965. Ownership and address churned for the next two decades: Practical Sailor traces the company's name and address shifting among California, New Jersey, and Massachusetts through the 1970s before it joined O'Day under Bangor Punta's umbrella in the early 1980s, while the Cal 25 class association's own history instead places the factory in Tampa, Florida from January 1981 to March 1985, then in Fall River, Massachusetts, managed by Jim Hunt, son of yacht designer C. Raymond Hunt. Bangor Punta itself was acquired by Lear Siegler in 1984, after which the business cycled through the names Lear Siegler Marine and Starcraft Sailboat Products before settling as Cal, a Division of the O'Day Corporation. Cal and O'Day ceased sailboat production in 1989. A Canadian licensee, Calgan Marine of North Vancouver, British Columbia, built roughly 300 Cal boats — 20-, 25-, 28-, and 29-footers — under arrangement with Jensen Marine, alongside its own Crown/Calgan line.
The designers
Lapworth earned a degree in marine engineering and naval architecture at the University of Michigan, then served in the U.S. Navy during WWII. Afterward he partnered with Los Angeles naval architect Merle Davis, who died about a year later, leaving Lapworth to run their practice alone; before Jensen, he had already designed a series of moderately successful racing boats, the L classes, including an L-24, L-36, L-40, and L-50. His early yachts were built of wood, a material he left behind once he partnered with Jensen and moved into fiberglass. Away from the drafting table, Lapworth cruised for many years on his own Cal Cruising 46 with his wife, Peggy, and their five children.
Construction through the eras
The Cal 40's success helped legitimize fiberglass as a hull material and established Jensen Marine as a significant fiberglass builder in its own right. Practical Sailor describes Jensen Marine's 1960s boats, the Cal 40 and Cal 46 among them, as typically built with solid hand-laid fiberglass hulls, using cloth and woven roving, with wooden bulkheads and interior structures tabbed to the hull with fiberglass; decks from this era were commonly plywood-cored, and lead ballast was precast, then lowered into the fiberglass keel cavity and glassed over. Blistering, per Practical Sailor, was a relatively minor problem on the older Cals overall, though some boats built in Tampa after 1982 reportedly had blistering and other issues as production moved east. Later boats increasingly used balsa-cored decks in place of plywood.
Lines and generations
As ownership changed hands, later Cal models were revised under the same Lapworth-Jensen design lineage and marked with a "2-" or "3-" prefix or a Mk II/Mk III suffix. The Cal 25 — a flush-deck, flat-top racer-cruiser, with 1,848 built between 1965 and 1976 according to SAILING Magazine, though the class association's own tally runs closer to two thousand — gave way in 1977 to the Cal 25-2, which widened the beam a foot, raised the cabin for standing headroom, and added privacy to the head behind a visibly different profile; Jensen, by then under Bangor Punta, built 392 of the second-generation boat, and a licensed Brazilian version sold as the Martinique 25. The Cal 46 followed a similar arc, succeeded by the redesigned-deck-and-interior Cal 2-46 and then a lightly revised Cal 3-46.
Who Cal is for
Cal suits sailors drawn to a marque whose oldest design still races competitively. The Cal 40's fin keel and spade rudder became the template Stan Honey says every ocean racer since has followed, and the design dominated the Transpac, the Bermuda Race, and the Southern Ocean Racing Circuit in the mid-1960s — winning the SORC outright in February 1964 and making front-page news at the time. A fleet of Cal 40s raced the Congressional Cup off Long Beach for years, and the model's edge never really faded: a Cal 40 won the 2006 Newport to Bermuda Race, Stan and Sally Honey repeated the win aboard their own Cal 40 in 2022, and a Cal 40 placed first overall in the 2025 Transpac to Hawaii, more than sixty years after the model's debut. Hull number one, Persephone, built in 1963, has passed through owners including three-time America's Cup winner Dennis Conner, adding a further thread to the model's competitive pedigree.
