Sea Pearl 21
Cat Ketch (unstayed) · Centerboard (Trunk) · First built 1982
A lightweight, unstayed cat ketch based on the Herreshoff Carpenter class, designed for shallow water and lively sailing
Designed by L. F. Herreshoff & Ron Johnson, built by Marine Concepts.
- LOA
- Beam
- Draft (max)
- Displacement
- Hull type
- Centerboard (Trunk)
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
TrailerableBeam 1.68 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 272 kg of hull, so roughly 850 kg on a trailer: check that against your own towing rating.Ramp-launchableAbout 272 kg of hull, with a keel that raises or a draft shallow enough to float off a trailer — she can go back on the trailer at the ramp, not only into the water.Shoal draftDraws 0.15 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelyComfort 5Sea-kindly
CoastalCapsize 2.61Bluewater
LightD/L 39Heavy
EasygoingSA/D 30.6Powered-up
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
- Lighter than ~97% of boats her size on file
- Draws less than ~98% of boats her size on file
- Narrower than ~100% of boats her size on file
Compared with 603 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.
Dimensions
Weights
Rig & sail area
Rig
Cat Ketch (unstayed)
Ratios
SA / displacement
30.6
Displacement / length
39.0
Comfort ratio
4.9
Capsize screening
2.61
Hull speed
5.8 kn
Pounds / inch immersion
373
Hull
Hull type
Centerboard (Trunk)
Construction
Fiberglass
Production
Years built
First built 1982
Units built
415
Designer
L. F. Herreshoff, Ron Johnson
Builder
Marine Concepts
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.
Melges 247.32 mSame hull family0.9 m longerA 7.32-meter sportboat with a lifting keel and a 32.09 sail-area-to-displacement ratio built for rapid planing
Dufour Yachts T66.15 mSame hull family0.3 m shorterA lightweight 800kg fractional sloop with a high sail-area-to-displacement ratio for spirited performance in light air
Catalina Yachts 227.26 mSame hull family0.9 m longerA swing-keel masthead sloop with 15,000 units sold, offering a highly versatile and trailerable coastal cruiser
Marshall Marine Corporation Sanderling5.54 mSame hull family0.9 m shorterA gaff-rigged catboat based on a 1941 design, featuring a shallow-draft keel-centerboard hull for versatile day sailing
Macgregor 26X7.87 mSame hull family1.5 m longerA water-ballasted sail-power hybrid designed for versatile coastal cruising and easy trailering
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.
Sea Pearl 28A Ron Johnson-designed cat ketch with a keel-centerboard configuration, built for versatile shoal-water performancePearson Yachts 27A shallow-draft wing-keel masthead sloop designed by William Shaw for accessible cruising in shoal watersPearson Yachts 23A William Shaw-designed masthead sloop featuring a keel-centerboard configuration for versatile shoal-water cruising
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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