Catalac 9 Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the Catalac 9M are defined by its heavy displacement and solid bridgedeck design. Unlike modern performance catamarans that utilize netting forward to reduce weight and pitching, the 9M features a solid GRP foredeck, which provides massive amounts of deck space but contributes to a "hobby-horsing" motion in short, steep chops. Because the hulls are relatively full-bodied and the boat carries significant weight for its size, it is not a light-wind flyer. It is best described as a "sail-assisted cruiser" rather than a pure performance multihull.

Under sail, the boat tracks exceptionally well thanks to its deep skegs and twin rudders. The 9M is remarkably stiff; while monohull sailors are accustomed to healing, the Catalac remains flat, which reduces fatigue on long passages. However, the low bridge deck clearance can lead to "slamming" when heading into significant head seas, a common critique in historical reviews of the era. Handling under power is a highlight of the 9M experience. Most models were equipped with either twin outboards or twin diesel engines connected to Sonic or Silenlette drive legs. This twin-engine configuration, combined with the wide beam, allows the boat to rotate within its own length, making it one of the most maneuverable 30-footers in a tight marina.

Interior Comfort & Variations

The interior of the Catalac 9M was revolutionary for the early 1970s, pioneering the "saloon-on-top" layout that is now standard in the catamaran industry. By elevating the main living area onto the bridgedeck, the designer created a bright, airy social space with panoramic views—a stark contrast to the "cave-like" interiors of contemporary monohulls. The 9M typically features a large U-shaped settee in the main cabin that can convert into an additional double berth.

The hulls are utilized for the "working" and sleeping quarters. In most standard configurations, the galley is located "down" in the starboard hull, providing ample counter space and storage that would be impossible on a monohull of similar length. The port hull usually houses the heads and a dedicated navigation station or additional berth. Storage is a hallmark of the 9M; Tom Lack’s philosophy of "strongly built" extended to the cabinetry and structural bulkheads. Variations of the 9M primarily focused on engine choice and minor updates to the window styles, transitioning from framed panes to more modern aesthetic treatments in later years. Its sibling, the Catalac 10M, essentially took this successful interior formula and extended the aft sections to provide more buoyancy and a slightly larger cockpit.

Popular Mentions & Media

The Catalac 9M has earned a "cult classic" status within the UK and European cruising communities. It is frequently cited in maritime literature as the vessel that proved catamarans could be viable, safe offshore cruisers for families. The model is a frequent subject of "Classic Boat" and "Used Boat" features in Practical Boat Owner, where it is praised for its longevity and value for money on the second-hand market. While it hasn't dominated modern social media like newer luxury cats, it remains a staple of long-distance cruising blogs by sailors who prioritize "sea-kindliness" over speed.

Known Issues & Buyer’s Checklist

Prospective buyers of a Catalac 9M should approach the survey with a focus on the boat's age and unique mechanical systems.

1. Sonic/Silenlette Drive Legs: Many 9Ms use steerable Z-drives. These units are high-maintenance; the bellows and internal seals must be inspected for water ingress. Parts can be difficult to source, leading some owners to convert to fixed shafts or high-thrust outboards.
2. Deck Compression: The mast sits on the bridgedeck cabin top. Over decades, the support structure beneath the mast step can compress if there has been water ingress into the core. Check for "crazing" or depression in the gelcoat around the mast base.
3. Window Sealing: The large, flat acrylic or glass windows are prone to leaking as the original bedding compounds dry out. Because the 9M relies on these windows for its signature airy feel, leaks can quickly damage the interior woodwork.
4. Osmosis: While Catalacs are known for heavy GRP layups, the early 1970s hulls did not always benefit from modern blister-resistant resins. A hull survey should check for signs of osmotic blistering, particularly in the hulls' lower sections.

Community & Resources

The primary hub for technical data and owner support is the Catalac Catamaran Page, which serves as an unofficial technical wiki, housing original brochures and wiring diagrams. Owners also congregate in various multihull-specific forums and the British Multihull Trust, where the 9M is celebrated as a significant piece of British maritime heritage.

The Verdict

The Catalac 9M is a rugged, "overbuilt" cruiser that offers more living space and stability per foot than almost any other vessel in its price bracket. While it lacks the speed of modern daggerboard catamarans, its safety record and ease of handling make it an ideal choice for coastal exploration or "liveaboard" couples.

Pros:

• Immense stability and a level sailing platform.
• Spacious, airy bridgedeck saloon with excellent visibility.
• Exceptional maneuverability with twin-engine configurations.
• Solid, heavy-duty GRP construction that stands the test of time.

Cons:

• Prone to "pounding" and "hobby-horsing" in head seas.
• Modest light-air sailing performance.
• Propulsion drive legs require specialized and frequent maintenance.
• High windage can make docking a challenge in a crosswind.