BoatsAlpa Yachts 42

Alpa Yachts 42

Staysail Ketch · Fin With Rudder On Skeg · First built 1973

A staysail ketch built from the same hull mold as the 1969 Alpa 12.7, later adapted for the Zuanelli 42

Designed by Sparkman & Stephens.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin With Rudder On Skeg

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 narrow beam gives 43 — a heavy, notably soft motion offshore.

Comfort ratio 43
CoastalBluewater

At 1.51 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.51
LightHeavy

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

Displacement / length 223
EasygoingPowered-up

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

Sail area / displacement 11.7
TenderStiff

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

Ballast 38%

A capable offshore cruiser with an easy motion when the sea gets up.

  • Heavier than ~91% of boats her size on file

Compared with 2882 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
37.5%
Rig & sail area
Rig
Staysail Ketch
Ratios
SA / displacement
11.7
Displacement / length
222.7
Comfort ratio
42.7
Capsize screening
1.51
Hull speed
8.2 kn
Pounds / inch immersion
1510
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Years built
First built 1973
Units built
8
Designer
Sparkman, Stephens
Builder
Alpa

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.

C&C Yachts 3911.96 mSame hull familyNear-identical lengthA 1971-1974 production masthead sloop with a moderate displacement-to-length ratio, balanced for coastal cruising
Dufour Yachts 39 CC11.99 mSame hull familyNear-identical lengthA Mortain & Mavrikios-designed center cockpit cruiser balancing a stable 1.88m draft with a nimble 7,080kg displacement
Warrior 4012.00 mSame hull familyNear-identical lengthA cutter-rigged cruiser with a skeg-hung rudder and a 1.52m draft, built for steady offshore passages
Cal Boats 4011.99 mSame hull familyNear-identical lengthA legendary offshore racer with 160 built, featuring a light displacement and a high sail-area-to-displacement ratio
Tartan Marine 39512.04 mSame hull familyNear-identical lengthA 2019 production performance cruiser featuring a spade rudder and a 1.88-metre draft for balanced coastal handling
Dufour Yachts 390 Grand Large11.94 mSame hull familyNear-identical lengthAn Umberto Felci-designed fractional sloop built for modern cruising comfort with a balanced 18.58 SA/displacement ratio

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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