BoatsChinook 34

Chinook 34

Masthead Sloop · Keel/centreboard · 1956–1968

The first fiberglass production sailboat of her size built in the US, featuring a keel-centerboard hull by Geiger

Designed by Frederick Geiger, built by Yacht Constructors.

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 draftDraws 1.17 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 38 — a sea-kindly motion in a seaway.

Comfort ratio 38
CoastalBluewater

At 1.58 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.58
LightHeavy

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

Displacement / length 440
EasygoingPowered-up

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

Sail area / displacement 16.2
TenderStiff

38% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 38%

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
Ballast / displacement
37.5%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
16.2
Displacement / length
440.3
Comfort ratio
37.8
Capsize screening
1.58
Hull speed
6.4 kn
Pounds / inch immersion
740
Hull
Hull type
Keel/Cbrd.
Construction
Fiberglass
Production
Years built
1956–1968
Units built
70
Designer
Frederick Geiger
Builder
Yacht Constructors, Inc, Cascade 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.

Allied Boat Co. Inc. Seabreeze 3510.52 mSame hull family0.2 m longerA MacLear and Harris-designed masthead sloop featuring a versatile keel-centerboard configuration for shoal-draft cruising
Pearson Yachts 3510.67 mSame hull family0.3 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 familyNear-identical lengthA Sparkman & Stephens masthead sloop featuring a keel-centerboard hull designed for shoal water and IOR competition
Morgan Yachts 309.12 mSame hull family1.2 m shorterA masthead sloop featuring a keel-centerboard configuration, designed by Charles Morgan Jr. for versatile shoal-draft sailing
Southerly 11511.23 mSame hull family0.9 m longerA versatile swing-keel cruiser evolving from Dick Carter's original design to the twin-rudder Humphreys MIII version
Irwin Yachts 38-111.51 mSame hull family1.2 m longerA 1970 masthead sloop featuring a deep-draft keel-centerboard configuration and a spade rudder for shoal-water versatility

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