BoatsAlpa Yachts A11

Alpa Yachts A11

Masthead Sloop · Fin Keel · First built 1968

A fibreglass production of the Illingworth MAICA, this 11-metre masthead sloop is built for offshore capability

Designed by John H. Illingworth.

LOA
Beam
Draft (max)
Displacement
Hull type
Fin 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 narrow beam gives 35 — a sea-kindly motion in a seaway.

Comfort ratio 35
CoastalBluewater

At 1.57 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.57
LightHeavy

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

Displacement / length 363
EasygoingPowered-up

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

Sail area / displacement 14.7

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

  • Narrower than ~94% of boats her size on file

Compared with 2964 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
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
14.7
Displacement / length
363.2
Comfort ratio
35.5
Capsize screening
1.57
Hull speed
6.7 kn
Pounds / inch immersion
791
Hull
Hull type
Fin Keel
Construction
Fiberglass
Production
Years built
First built 1968
Designer
John H. Illingworth
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.

Pacific Seacraft 3711.25 mSame hull familyNear-identical lengthOriginally launched as the Crealock 37, this cutter features a 38% ballast ratio and a hull speed of 7.06 knots
Cruising Consultants Crealock 3711.25 mSame hull familyNear-identical lengthA William Crealock-designed masthead sloop with a skeg-hung rudder, built for offshore stability and heavy-weather comfort
Grampian Marine Ltd. Walton 3711.38 mSame hull familyNear-identical lengthA Sparkman & Stephens design from 1964, this masthead sloop features a fin keel and a high comfort ratio for offshore cruising
Rustler Yachts 3711.28 mSame hull familyNear-identical lengthA masthead sloop with a fin keel and skeg-hung rudder, designed by Stephen Jones for modern offshore cruising
Jeanneau Fantasia 3711.15 mSame hull familyNear-identical lengthA Philippe H. Harle-designed masthead sloop with a high ballast ratio for stability and comfortable offshore cruising
Irwin Yachts 37-111.28 mSame hull familyNear-identical lengthA masthead sloop designed by Ted Irwin as a no-compromise cruiser, featuring a fin keel and skeg-mounted rudder

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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