BoatsAllied Boat Co. Seawind

Allied Boat Co. Seawind

Masthead Ketch · Long Keel w/trans. Hung Rudder · 1962–1982

A Thomas Gillmer-designed masthead ketch with a long keel, marking both the beginning and the end of the Allied Boat Co.

Designed by Thomas Gillmer.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Long Keel w/trans. Hung Rudder

See her sail

The Allied Boat Co. Seawind, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from TheSailingChannel.TV

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 37 — a sea-kindly motion in a seaway.

Comfort ratio 37
CoastalBluewater

At 1.62 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.62
LightHeavy

388 — very heavy for her waterline, a serious load-carrying cruiser.

Displacement / length 388
EasygoingPowered-up

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

Sail area / displacement 13.0
TenderStiff

35% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 35%

Built heavy and sea-kindly — a boat made to cross oceans and forgive a rough night.

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

On the water

The Allied Boat Co. Seawind on video

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
35.0%
Rig & sail area
Rig
Masthead Ketch
Ratios
SA / displacement
13.0
Displacement / length
387.5
Comfort ratio
36.9
Capsize screening
1.62
Hull speed
6.6 kn
Pounds / inch immersion
793
Hull
Hull type
Long keel w/trans. hung rudder
Construction
Fiberglass
Production
Years built
1962–1982
Units built
161
Designer
Thomas Gillmer
Builder
Allied Boat Co

Boats like this, on the water

More boats like her, on the water

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.

Beneteau Evasion 329.70 mSame hull family0.4 m longerA long-keeled masthead ketch that launched the Evasion line and marked a new era for Beneteau
Rustler 319.58 mSame hull family0.3 m longerA heavy-displacement masthead sloop with a long keel, evolved from the North Sea 24 and sharing lineage with the Twister 31
Cape Dory 30C9.21 mSame hull familyNear-identical lengthA cutter-rigged cruiser with a full keel and a 1.27-metre draft, built for steady performance between 1976 and 1987
Pacific Seacraft Orion 279.42 mSame hull familyNear-identical lengthA heavy-displacement cutter designed by Henry Mohrschladt for offshore stability and traditional long-keel handling
Alden 32 Motor Sailer9.60 mSame hull family0.3 m longerOriginally known as the Winsome Class, this masthead sloop features a long keel and was available in both sloop and ketch
Rawson 309.30 mSame hull familyNear-identical lengthA William Garden-designed long-keel cruiser offered in tall-rig, yawl, and rare pilothouse configurations

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.

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