BoatsSea Bird 37

Sea Bird 37

Masthead Ketch · Long Keel · First built 1973

A long-keeled masthead ketch from Harden and Huntingford, designed for steady, comfortable cruising.

Designed by Harden & Huntingford, built by Cooper Enterprises.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Long Keel

Is it for you?

Character

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

LivelySea-kindly

Her moderate displacement on a moderate beam gives 32 — a sea-kindly motion in a seaway.

Comfort ratio 32
CoastalBluewater

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

Capsize screening 1.76
LightHeavy

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

Displacement / length 234
EasygoingPowered-up

12.9 — modest power for her weight; easygoing rather than lively, and happier with a breeze.

Sail area / displacement 12.9
TenderStiff

33% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 33%

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

  • Draws less than ~88% of boats her size on file

Compared with 426 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
33.3%
Rig & sail area
Rig
Masthead Ketch
Ratios
SA / displacement
12.9
Displacement / length
234.1
Comfort ratio
31.8
Capsize screening
1.76
Hull speed
7.6 kn
Pounds / inch immersion
1335
Hull
Hull type
Long Keel
Construction
Fiberglass
Production
Years built
First built 1973
Designer
Harden, Huntingford
Builder
Cooper Enterprises

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.

Island Packet 3510.77 mSame hull family0.4 m shorterA 10.77-meter cutter featuring a 45% ballast ratio, engineered for heavy-weather stability and extended offshore range
Island Packet 4012.19 mSame hull family1.0 m longerA 12.19-meter cutter featuring a 1.42-meter draft that balances offshore stability with shoal-water accessibility
Shannon Yachts 38 PH11.51 mSame hull family0.3 m longerA long-keeled cutter designed by Stadel for offshore stability, offering a comfortable motion and steady passage-making
Chris-Craft Sail Yacht 3510.67 mSame hull family0.5 m shorterA long-keeled masthead sloop from the boards of Sparkman & Stephens, featuring a hull shared with the Caribbean 35
Nauticat 3310.11 mSame hull family1.1 m shorterSiltala's inaugural production model, this long-keeled ketch offers a stable, high-comfort platform for extended cruising
Bristol Yachts 3911.89 mSame hull family0.7 m longerA 1966 masthead sloop with a long keel, built for five years as a precursor to the long-running Bristol 40

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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