BoatsSan Juan 24

San Juan 24

Masthead Sloop · Fin keel, spade rudder · First built 1973

A Bruce Kirby-designed IOR quarter-tonner that balances competitive racing pedigree with a stable masthead sloop rig

Designed by Bruce Kirby, built by Clark Boat Co.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/spade Rudder

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

TrailerableBeam 2.44 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,452 kg of hull, so roughly 2,050 kg on a trailer: check that against your own towing rating.
LivelySea-kindly

Her moderate displacement on a moderate beam gives 15 — a quick, lively motion that feels every wave.

Comfort ratio 15
CoastalBluewater

2.17 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.17
LightHeavy

193 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 193
EasygoingPowered-up

18.2 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 18.2
TenderStiff

52% of her weight is ballast — very stiff, carrying full sail in a blow.

Ballast 52%

A balanced, easily-driven cruiser — comfortable and forgiving for coastal work.

  • Narrower than ~76% of boats her size on file

Compared with 1387 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
Ballast / displacement
51.6%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
18.2
Displacement / length
192.7
Comfort ratio
14.9
Capsize screening
2.17
Hull speed
5.9 kn
Pounds / inch immersion
557
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
First built 1973
Units built
1200
Designer
Bruce Kirby
Builder
Clark Boat Co

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.

Halcyon 236.93 mSame hull family0.4 m shorterA triple-keeled masthead sloop by Alan H. Buchanan, offering shallow-draft versatility based on the earlier Crystal 23
J Boats Tillotson Pearson J/247.32 mSame hull familyNear-identical lengthA legendary Rodney Johnstone design that defined the modern one-design racer with its high sail-area-to-displacement ratio
Sirius 7277.27 mSame hull familyNear-identical lengthA development of the Sirius 24, this fractional sloop features a fin keel with skeg-mounted rudder for balanced handling
Jeanneau Sun Odyssey 24.27.30 mSame hull familyNear-identical lengthA Jacques Fauroux-designed fractional sloop built for coastal cruising with a stable fin-and-bulb keel
Martinique 257.70 mSame hull family0.4 m longerA Brazilian-built masthead sloop with a 44% ballast ratio, offering a stiff and stable platform for coastal cruising
Dehler Yachts 25CR7.50 mSame hull family0.2 m longerA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance

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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