BoatsShe 27

She 27

Masthead Sloop · Fin With Rudder On Skeg · First built 1971

A Sparkman & Stephens quarter-tonner designed for IOR Mk III competition, featuring a fin keel and skeg-mounted rudder

Designed by Sparkman & Stephens, built by South Hants Marine.

LOA
Beam
Draft (max)
Displacement
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.

LivelySea-kindly

Her heavy displacement on a moderate beam gives 22 — a moderate, middle-of-the-road motion.

Comfort ratio 22
CoastalBluewater

1.96 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.96
LightHeavy

329 — heavy for her waterline, built to carry stores and ride steadily.

Displacement / length 329
EasygoingPowered-up

15.3 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 15.3

A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
15.3
Displacement / length
328.9
Comfort ratio
22.1
Capsize screening
1.96
Hull speed
5.9 kn
Pounds / inch immersion
585
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Years built
First built 1971
Designer
Sparkman, Stephens
Builder
South Hants Marine

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.

Ericson Yachts 278.15 mSame hull family0.2 m longerA Bruce King-designed masthead sloop with over 1,200 built, offering a stiff, stable platform for coastal cruising
Puma 268.00 mSame hull familyNear-identical lengthA masthead sloop derived from an IOR Half Ton prototype, designed by Holman and Pye for competitive performance
Colvic Ltd. Sailor 268.21 mSame hull family0.3 m longerA twin-keeled masthead sloop with hulls moulded by Colvic and finished by various yards, including Atlanta Marine
Puma 277.95 mSame hull familyNear-identical lengthA Ron Holland-designed masthead sloop with a fin keel and spade rudder, built for performance-oriented coastal cruising
Cascade Yachts 278.23 mSame hull family0.3 m longerA masthead sloop with a fin keel and spade rudder, designed by Robert A. Smith for balanced coastal cruising
Catalina Yachts 278.18 mSame hull family0.3 m longerA masthead sloop with 6,662 hulls produced over two decades, serving as a staple of coastal cruising since 1971

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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