BoatsCheoy Lee Shipyard Ltd. Offshore 31

Cheoy Lee Shipyard Ltd. Offshore 31

Masthead Sloop · Long Keel · First built 1968

A long-keeled masthead sloop derived from the Herreshoff 28, featuring an extended counter and inboard rudder

Designed by Herreshoff, Cheoy Lee Shipyard & L. Francis Herreshoff.

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.

Shoal draftDraws 1.12 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her heavy displacement on a narrow beam gives 36 — a sea-kindly motion in a seaway.

Comfort ratio 36
CoastalBluewater

At 1.59 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.59
LightHeavy

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

Displacement / length 376
EasygoingPowered-up

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

Sail area / displacement 13.3
TenderStiff

36% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 36%

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

  • Draws less than ~85% of boats her size on file

Compared with 418 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
35.5%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
13.3
Displacement / length
376.2
Comfort ratio
35.9
Capsize screening
1.59
Hull speed
6.5 kn
Pounds / inch immersion
729
Hull
Hull type
Long Keel
Construction
Fiberglass
Ballast type
Iron
Production
Years built
First built 1968
Units built
150
Designer
Herreshoff, Cheoy Lee Shipyard, L. Francis Herreshoff
Builder
Cheoy Lee Shipyard Ltd

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.

Cape Dory 30C9.21 mSame hull family0.2 m shorterA cutter-rigged cruiser with a full keel and a 1.27-metre draft, built for steady performance between 1976 and 1987
Elizabethan 319.45 mSame hull familyNear-identical lengthA David Thomas-designed long-keeled masthead sloop with a 50% ballast ratio, built for stability and offshore comfort
Allied Boat Co. Seawind9.30 mSame hull familyNear-identical lengthA Thomas Gillmer-designed masthead ketch with a long keel, marking both the beginning and the end of the Allied Boat Co.
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
Sea Sprite 309.20 mSame hull family0.3 m shorterA 9.2-metre cruiser with a 41% ballast ratio, delivering a stiff and steady motion for coastal passages
Cape Dory 288.56 mSame hull family0.9 m shorterA classic Carl Alberg full-keel masthead sloop designed for steady, comfortable cruising

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.

The newsletter

New boats, new stories, from everywhere.

One email from the fleet — boats newly added, videos newly analyzed. No noise.

Report an issue