BoatsSea Bird 37 MS

Sea Bird 37 MS

Masthead Sloop · Long Keel · First built 1973

A long-keeled masthead sloop featuring a custom deck design by Forbes Cooper for comfortable cruising

Designed by Huntingford, Hardin & Cooper.

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

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

Sail area / displacement 13.1
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 Sloop
Ratios
SA / displacement
13.1
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
Huntingford, Hardin, Cooper
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.

Shannon Yachts 3811.51 mSame hull family0.3 m longerThe inaugural model from Shannon Yachts, this long-keeled cutter was produced with optional pilot house configurations
Bayfield 3610.97 mSame hull family0.2 m shorterA Haydn Gozzard-designed cutter with a long keel, built for steady, comfortable passage-making.
Island Packet 3811.58 mSame hull family0.4 m longerA 38-foot cutter with a 1.52-metre draft, balancing a heavy 4535-kilogram ballast for offshore stability
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
Tashiba 3610.97 mSame hull family0.2 m shorterA 1986 cutter with a 43% ballast ratio, engineered for heavy-displacement stability and offshore passage-ready motion
Morgan Yachts Out Island 3610.92 mSame hull family0.3 m shorterA 1970s production cruiser featuring a 1.14-metre draft and a heavy ballast ratio for stability in shallow waters

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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