South Coast 21
Fractional Sloop · Fin Keel · First built 1965
A Carl Alberg-designed fractional sloop built for home assembly, refined with a larger rudder to improve balance
Designed by Carl Alberg.
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Fin Keel
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
Her heavy displacement on a moderate beam gives 14 — a quick, lively motion that feels every wave.
2.20 — right around the 2.0 line, the edge between coastal and offshore.
303 — heavy for her waterline, built to carry stores and ride steadily.
20.8 — plenty of sail for her weight; lively and quick to respond.
31% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.
Powered-up and quick to accelerate — this one likes to sail.
- Lighter than ~80% of boats her size on file
- Draws less than ~78% of boats her size on file
- Narrower than ~89% of boats her size on file
Compared with 768 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
Boats like this
Nearby designs by size, type, and era — worth a look alongside her.
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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