Design and Construction
Rayner’s 40-foot design is a long-keel monohull built by Mitchell & Sons in fiberglass from 1976. On a 29.99-foot waterline, she displaces 23,519 pounds. Her 10.99-foot beam and 4.99-foot draft give her the narrow, deep-bodied profile typical of a 1970s British cruiser.
A displacement-to-length ratio of 389.26 puts the Atlantic 40 firmly in heavy-displacement territory. Her published comfort ratio is 45.25, while her capsize screening value is 1.54. Together, those figures describe a stable offshore hull form intended for serious cruising rather than coastal daysailing.
Rig and Handling
The Atlantic 40 carries a masthead ketch rig, spreading the sail area between two masts—a practical arrangement for managing a heavy hull with a small crew. Period reviews describe her as a heavy, under-powered boat and note that she lacks stiffness.
That lack of initial stiffness is paired, however, with excellent righting capability if capsized. In other words, she 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. The recorded auxiliary is a single 40-horsepower Mercedes diesel.
Accommodations
The available sources don’t record the Atlantic 40’s interior layout, berth count, or joinery details. Builder-context material covering other Atlantic marques doesn’t apply to this Rayner design from Mitchell & Sons.
Verdict
The Atlantic 40 is a conservative, heavy-displacement ketch from the British cruising school of the mid-1970s. Rayner gave her a long-keel fiberglass hull that the sailing press rated as under powered and lacking stiffness, but also credited with strong capsize recovery and a clear vocation as a bluewater cruiser. She suits an offshore-minded owner who values predictability over speed.
Pros
- Excellent righting capability if capsized
- Heavy bluewater-cruising hull with a 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
