BoatsCal Boats 34-III

Cal Boats 34-III

Masthead Sloop · Fin keel, spade rudder · 1977–1979

A late-seventies evolution of the original hull, updated with an offshore-oriented interior for blue water cruising

Designed by C. William Lapworth, built by Jensen Marine.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/spade Rudder

Is it for you?

Character

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

LivelySea-kindly

Her moderate displacement on a moderate beam gives 26 — a moderate, middle-of-the-road motion.

Comfort ratio 26
CoastalBluewater

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

Capsize screening 1.85
LightHeavy

259 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 259
EasygoingPowered-up

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

Sail area / displacement 16.3
TenderStiff

46% of her weight is ballast — stiff, standing up well to her sails.

Ballast 46%

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

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
45.6%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
16.3
Displacement / length
259.1
Comfort ratio
26.1
Capsize screening
1.85
Hull speed
6.8 kn
Pounds / inch immersion
929
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
1977–1979
Units built
193
Designer
C. William Lapworth
Builder
Jensen Marine, Cal Boats

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.

Hunter Marine 339.96 mSame hull family0.2 m shorterA 1977 masthead sloop with a 38% ballast ratio, designed for stability and coastal performance
Cal Boats 3410.13 mSame hull familyNear-identical lengthA masthead sloop with a fin keel and spade rudder, favored by Jensen Marine founder Jack Jensen for personal cruising
Moody 3410.19 mSame hull familyNear-identical lengthA 1980s mid-sized cruiser with a 40% ballast ratio, designed for stability and predictable handling in coastal waters
Omega 3410.26 mSame hull familyNear-identical lengthA Ron Holland-designed fractional sloop from 1981, balancing a high sail-area-to-displacement ratio for spirited sailing
King's Cruiser 3310.26 mSame hull familyNear-identical lengthA Pelle Pettersson-designed masthead sloop featuring a fin keel and skeg-hung rudder for stable, classic cruising
Moody 33310.06 mSame hull familyNear-identical lengthA twin-keel cruiser featuring an aft cabin with a double berth accessible directly from the saloon

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.

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