BoatsColumbia Yachts 31

Columbia Yachts 31

Masthead Sloop · Keel/centreboard · 1965–1968

A Charles Morgan-designed masthead sloop with a keel-centerboard hull, derived from his earlier Tiger Cub design

Designed by Charles Morgan Jr.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Keel/Cbrd.

Is it for you?

Character

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

Shoal draughtDraws 0.94 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 moderate beam gives 26 — a moderate, middle-of-the-road motion.

Comfort ratio 26
CoastalBluewater

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

Capsize screening 1.93
LightHeavy

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

Displacement / length 382
EasygoingPowered-up

16.3 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 16.3
TenderStiff

40% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 40%

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

  • Heavier than ~80% of boats her size on file
  • Draws more than ~82% of boats her size on file

Compared with 453 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
40.0%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
16.3
Displacement / length
381.8
Comfort ratio
25.9
Capsize screening
1.93
Hull speed
6.2 kn
Pounds / inch immersion
755
Hull
Hull type
Keel/Cbrd.
Construction
Fiberglass
Production
Years built
1965–1968
Units built
97
Designer
Charles Morgan Jr
Builder
Columbia Sailing Yachts

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.

Tartan Marine 278.23 mSame hull family1.1 m shorterA Sparkman & Stephens keel-centerboard sloop that launched Tartan Marine and enjoyed a 19-year production run
Pearson Yachts 3510.67 mSame hull family1.4 m longerBoasting the longest production run of any Pearson model, this keel/centerboard sloop remained largely unchanged for 14 years
Tartan Marine 34 C10.49 mSame hull family1.2 m longerA Sparkman & Stephens masthead sloop featuring a keel-centerboard hull designed for shoal water and IOR competition
Paceship Yachts Westwind 247.29 mSame hull family2.0 m shorterA Ted Hood-designed masthead sloop with a keel-centerboard configuration, built for versatility in shoal waters
O'day 329.63 mSame hull family0.3 m longerA 9.6-metre masthead sloop with a deep-draft keel-centreboard configuration designed for versatile coastal cruising

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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