Herreshoff 31 (Cat Ketch 31)
Cat Ketch (unstayed) · Fin w/transom Hung Rudder · 1979–1986
An unstayed cat ketch designed by Halsey Herreshoff, featuring a shoal-draft fin keel for easy handling and stability
Designed by Halsey C. Herreshoff, built by Cat Ketch Corp.
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Fin w/transom Hung Rudder
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 moderate beam gives 18 — a quick, lively motion that feels every wave.
2.11 — right around the 2.0 line, the edge between coastal and offshore.
154 — light for her waterline, so she is easily driven and quick to accelerate.
9.9 — modest power for her weight; easygoing rather than lively, and happier with a breeze.
44% of her weight is ballast — stiff, standing up well to her sails.
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
- Draws less than ~90% of boats her size on file
Compared with 2608 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.
Boats like this, on the water
Nobody has filmed this one — but these are close.
Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.
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.
Keep looking
Nothing filmed of this one yet
Two ways to keep looking — both search what the fleet has actually recorded.
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