BoatsColvic Craft 31

Colvic Craft 31

Masthead Ketch · Long Keel · First built 1972

A 1972 Colvic-built cruiser featuring a high comfort ratio and shallow 1.22-metre draft for versatile coastal work

Designed by John Bennet & Assoc, built by Covic Craft.

LOA
Beam
Draft (max)
Displacement
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 heavy displacement on a moderate beam gives 39 — a sea-kindly motion in a seaway.

Comfort ratio 39
CoastalBluewater

At 1.60 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.60
LightHeavy

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

Displacement / length 320
EasygoingPowered-up

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

Sail area / displacement 7.5

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

The record

Full specifications

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

Dimensions
Weights
Rig & sail area
Rig
Masthead Ketch
Ratios
SA / displacement
7.5
Displacement / length
319.5
Comfort ratio
39.0
Capsize screening
1.60
Hull speed
7.1 kn
Pounds / inch immersion
1001
Hull
Hull type
Long Keel
Construction
Fiberglass
Production
Years built
First built 1972
Designer
John Bennet, Assoc
Builder
Covic Craft, Ardleigh Lam. Plastics, Colvic Craft

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 George 319.45 mSame hull familyNear-identical lengthA William Atkin-designed cutter with a heavy ballast ratio and long keel, built for stability and offshore comfort
Nauticat 3310.11 mSame hull family0.7 m longerSiltala's inaugural production model, this long-keeled ketch offers a stable, high-comfort platform for extended cruising
Hans Christian 339.98 mSame hull family0.5 m longerA heavy-displacement cutter with a long keel, designed by Harwood Ives for comfortable, steady offshore passage-making
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.
Rustler 319.58 mSame hull familyNear-identical lengthA heavy-displacement masthead sloop with a long keel, evolved from the North Sea 24 and sharing lineage with the Twister 31

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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