Design and Construction
Rayner's 40-foot design is a monohull with a long keel and solid fiberglass construction, built by Mitchell & Sons in fiberglass since 1976 anchor. The 10.99-foot beam and 4.99-foot draft give her the narrow, deep-bodied profile typical of a 1970s British cruiser, and the displacement-to-length ratio of 389.26 places her firmly in heavy-displacement territory. With a comfort ratio of 45.25 and a capsize screening value of 1.54, the published data describe a stable offshore hull form whose numbers align with serious cruising rather than coastal daysailing.
Rig and Handling
The Atlantic 40 is a masthead ketch, a rig choice that spreads sail area across two masts and suits a heavy hull managed by a small crew. Period reviews describe her as a heavy boat that is under powered anchor, and note she lacks stiffness. That lack of initial stiffness is paired, however, with an excellent righting capability if capsized, a combination that marks her as a boat that heels readily but recovers predictably — a trait the reviewers judged best suited to heavy bluewater cruising. Her hull speed is a modest 7.34 knots, consistent with the long-keel, full-bodied hull and the 40-horsepower Mercedes diesel recorded as her single auxiliary.
Accommodations
The available sources record no interior layout, berth count, or joinery detail for the Atlantic 40, and the builder-context material for other Atlantic marques does not apply to this Mitchell & Sons Rayner design.
The Verdict
The Atlantic 40 is a conservative, heavy-displacement ketch from the mid-1970s British school of cruiser design. Rayner gave her a long-keel fiberglass hull that the sailing press rated as under powered and not stiff, yet blessed with strong capsize recovery and a clear vocation as a bluewater cruiser. She is a boat for the offshore-minded owner who values predictability over speed.
Pros
- Excellent righting capability if capsized
- Heavy bluewater-cruising hull with long keel and solid fiberglass construction
- Traditional masthead ketch rig suited to short-handed sail handling
Cons
- Under powered for her displacement
- Not stiff in normal sailing trim
- Modest 7.34-knot hull speed
