Cal 39 Mk Iii Information, Review, Specs

History and Design

The story of the Cal 39 Mk III begins with the enduring collaboration between builder Jack Jensen and the prolific naval architect Bill Lapworth, a partnership that profoundly shaped the Cal brand's identity. Lapworth was a pioneer in modern yacht design, and his influence is evident across many iconic Cal models. The Cal 39, initially introduced in 1970, saw several iterations, with the Mk III emerging in 1983 as an updated version of the Cal 39 Mk II. This period marked a significant operational shift for Cal Boats, as the factory had relocated from Costa Mesa, California, to Tampa, Florida, in January 1981, where production continued until March 1985 before a final move to Fall River, Massachusetts.

Lapworth's design philosophy for Cal boats, including the 39 series, focused on achieving a harmonious blend of performance, stability, and ease of handling in a fiberglass platform, 6]. While the hull, ballast, and rigging were largely consistent between the Mk II and Mk III, the latter saw significant redesigns to its interior, deck, and cabin trunk. Notably, the Cal 39 Mk III incorporated an expanded aft cabin, distinguishing it from the Mk II's larger quarterberth layout. The model was offered with a standard deep fin keel, providing a maximum draft of 6.75 feet, but also featured a shoal draft option at 5.50 feet. Additionally, a tall rig configuration was available, offering a larger sail area for enhanced performance.

Sailing Performance and Handling

The Cal 39 Mk III is characterized as a moderate-weight sailboat that delivers reasonably good performance, often praised by owners for its seakindly motion and a good turn of speed. With a displacement of 19,000 lbs and a waterline length of 32.08 feet, its Displacement to Length ratio of approximately 257 suggests a balanced cruiser capable of both comfortable passage-making and spirited sailing.

The boat's Sail Area to Displacement ratio stands at about 16.17 for the standard rig, indicating a respectable, though not extreme, level of performance, particularly in moderate conditions. For those seeking more light-air prowess, the tall rig option boosted this ratio to 17.59, enhancing its ability to move well in lighter winds. The Ballast to Displacement ratio of approximately 37% (7,000 lbs of lead ballast on a 19,000 lb displacement) contributes to the boat's "stable/stiff" nature and good righting capability, allowing it to stand up to a breeze effectively.

Equipped with a fin keel and a spade rudder, the Cal 39 Mk III offers a good balance of maneuverability and directional stability. Owners often report that the boat tracks well and remains very dry, attributes that contribute to a comfortable experience in varying sea states. The masthead sloop rig, common to the Cal 39 Mk III, is known for its simplicity and effectiveness.

Accommodations and Layout

While detailed specifications on maximum headroom are not consistently available, the interior layout of the Cal 39 Mk III was a key area of improvement over its predecessors, designed to maximize comfort and utility. The standard arrangement typically features a spacious forward cabin with a large V-berth, offering ample sleeping space and storage below.

The main salon is well-appointed, and a notable feature of the Mk III is the L-shaped galley, positioned opposite the expanded aft cabin. The galley is equipped to facilitate comfortable cruising. A dedicated navigation station, often located to port, provides a decent-sized chart table, catering to the needs of navigators. The aft cabin, a significant enhancement in the Mk III, typically includes a sink and a large hanging locker, providing privacy and convenience for crew or guests. While specific material details vary by individual boat and refit, Cal boats of this era generally featured sturdy fiberglass construction, often complemented by wood trim to provide a traditional nautical feel. Storage solutions, including drawers, are integrated throughout the cabins.

Owner's Perspectives

Owners of the Cal 39 Mk III frequently laud its robust construction and seaworthy characteristics. Many have successfully adapted their vessels for serious cruising, highlighting the boat's inherent stability and comfortable motion in a seaway. The design is often praised for its good balance and solid performance under sail, making it a rewarding boat to handle. Furthermore, with appropriate setup and planning, the Cal 39 Mk III is considered manageable for single-handed sailing. While specific recurring common problems are not widely reported in general owner discussions, individual boats, like any vessel of its age, may require typical maintenance such as inspection or replacement of standing rigging or addressing components of the steering system over time. The enduring popularity of the Cal 39 Mk III is a testament to its blend of performance, comfort, and sturdy build quality, fostering an active community of owners who continue to sail and cherish these classic vessels.