DIAMOND 27

About the DIAMOND 27

In 1966 Offshore Yachts aquired the molds and renamed the boat the HALCYON 27. See HALCYON 27. Shown here is the DIAMOND MKII. An earlier version had a fractional rig.

The Diamond 27 is a rare, classic British cruiser designed by Alan Buchanan and built by Thames Marine Ltd in the UK between 1963 and 1966. With only 12 hulls constructed, this vessel represents a scarce opportunity for owners seeking a unique, full-keel sloop from the early 1960s.

Best for:

This boat is best suited for coastal cruisers and traditional sailing enthusiasts who value a comfortable, stable ride over high-performance racing metrics. Its moderate displacement and full keel make it ideal for relaxed weekend cruising and short offshore passages.

Bluewater capability:

With a displacement of 6000.0 lb and a low capsize ratio of 1.69, the Diamond 27 possesses the stability and motion characteristics suitable for protected offshore passages, though its age and rarity require careful assessment of structural integrity.

Comparables:

Comparable vessels include other British full-keel sloops from the early 1960s, such as the Hallberg-Rassy 35 or early O'Day models, which share similar displacement and traditional hull forms. These boats offer a similar balance of comfort and seaworthiness for coastal cruising.