Colvic Atlanta 31 Information, Review, Specs

Sailing Performance & Handling

The Atlanta 31 is a heavy-displacement cruiser that relies on its 10-foot 6-inch beam and a substantial ballast-to-displacement ratio to provide a stiff, upright sailing experience. Most versions were rigged as ketches, a configuration that offers a versatile "sail plan for all seasons," allowing owners to drop the mainsail and sail comfortably under jib and mizzen when the wind speeds climb. Under sail alone, the Atlanta 31 is not a fast boat; its long keel and significant wetted surface area mean it requires a stiff breeze to get moving. According to editorial assessments by Yachting Monthly, which reviewed the near-identical 32-foot variant, the design excels in heavy weather where its weight provides a predictable, sea-kindly motion that lighter modern yachts cannot replicate.

The long keel ensures excellent tracking, making the boat easy to steer on long offshore passages, but it presents a challenge in tight marinas. Without the assistance of a bow thruster, the Atlanta 31 can be recalcitrant in reverse, often requiring a "steer with the throttle" approach. Under power, the boat typically carries a 30hp to 50hp diesel engine, which is sufficient to maintain hull speed even against a headwind—a core requirement for a true motor sailer.

Interior Comfort & Variations

The hallmark of the Atlanta 31 is its wheelhouse, which provides a sheltered steering position and a social hub that remains dry regardless of external conditions. The interior is typically divided into three distinct zones: a forward V-berth cabin, a central saloon with a galley and dinette, and the elevated wheelhouse. Because many were home-finished, some owners opted for a "linear" galley while others preferred a "U-shaped" arrangement. The use of the Atlanta 32 hull—a direct sibling that added a small transom extension—often allowed for a slightly more commodious aft section or an integrated bathing platform.

Headroom is a standout feature, often exceeding 6 feet 2 inches in the wheelhouse and main saloon. The cabinetry in professionally finished models, such as those by the Atlanta Marine yard, often features heavy teak or mahogany joinery. Storage is cavernous, designed for long-term liveaboard potential rather than weekend racing. The Atlanta 31 also saw a smaller sibling, the Atlanta 25, and a larger 36-foot version, but the 31/32 remains the most balanced iteration of Alan Hill’s "Atlanta" vision.

Known Issues & Buyer’s Checklist

When inspecting a Colvic Atlanta 31, the primary concern is the standard of the original fit-out. Because these were "kit boats," buyers must scrutinize the electrical systems and plumbing. Technical discussions among long-term owners often highlight the following areas for inspection:

• Hull Osmosis: As with many GRP boats from the 1970s, Colvic hulls are known for being thick and robust, but they are susceptible to osmotic blistering if they have not been epoxy-treated.
• Deck-to-Hull Joint: The mechanical fastening of the deck molding to the hull can develop leaks over decades. Inspect the interior lining for water stains, particularly around the chainplates and the wheelhouse windows.
• Engine Access: While the engine is usually located under the wheelhouse floor, access can be restricted depending on how the internal bulkheads were finished by the original builder.
• Mizzen Chainplates: On ketch-rigged versions, the mizzen mast supports are sometimes an afterthought in DIY builds. Ensure the loads are properly distributed to the hull structure.

Community & Resources

The Colvic brand is supported by a dedicated community of owners who value the "built like a tank" reputation of these vessels. The Colvic Owners Group serves as a primary hub for technical drawings and advice on hull refits. Additionally, fans of Alan Hill designs often find technical crossover data through the Colvic Watson Owners Association, as the Atlanta and Watson ranges shared similar manufacturing techniques and materials at the Blackwater Estuary yard.

The Verdict

The Colvic Atlanta 31 is a rugged, honest motor sailer that offers an affordable entry into blue water cruising or comfortable coastal living. It trades speed for security and provides a level of shelter that makes it an ideal platform for Northern European waters.

Pros

• Exceptional seaworthiness and stability in heavy weather.
• Spacious, sheltered wheelhouse and high interior headroom.
• Heavy-duty GRP construction capable of withstanding decades of use.
• Versatile ketch rig (on most models) for easy sail handling.

Cons

• Languid performance in light winds.
• Variable interior build quality due to DIY kit origins.
• Difficult to maneuver in reverse due to the long keel design.