CNSO Shellfish
Masthead Sloop · Fin With Rudder On Skeg · First built 1965
A versatile masthead sloop available in ketch configuration, featuring a shallow 1-metre draft for exploring shoal waters
Designed by Francois Sergent.
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Fin With Rudder On Skeg
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
Her light displacement on a narrow beam gives 18 — a quick, lively motion that feels every wave.
1.94 — just under the 2.0 offshore line; her beam is modest for her weight.
151 — light for her waterline, so she is easily driven and quick to accelerate.
19.3 — plenty of sail for her weight; lively and quick to respond.
36% of her weight is ballast — moderately stiff, a middle-of-the-road stability.
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
- Narrower than ~83% of boats her size on file
Compared with 2258 boats of the same type within a quarter of her length.
The record
Full specifications
The complete reference set — tap any figure to switch between metric and imperial.
The family
Related models
The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.
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