BoatsMystery 30

Mystery 30

Fractional Sloop · Fin w/bulb & Spade Rudder · 2010–2024

A David Thomas-designed fractional sloop with a high ballast ratio and performance-oriented sail area for her displacement

Designed by David Thomas, built by Cornish Crabbers Ltd.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/bulb & 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 narrow beam gives 21 — a moderate, middle-of-the-road motion.

Comfort ratio 21
CoastalBluewater

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

Capsize screening 1.88
LightHeavy

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

Displacement / length 230
EasygoingPowered-up

20.3 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.3
TenderStiff

47% of her weight is ballast — stiff, standing up well to her sails.

Ballast 47%

Powered-up and quick to accelerate — this one likes to sail.

  • Narrower than ~82% of boats her size on file

Compared with 2550 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
47.2%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
20.3
Displacement / length
230.1
Comfort ratio
21.3
Capsize screening
1.88
Hull speed
6.4 kn
Pounds / inch immersion
686
Hull
Hull type
Fin w/bulb & spade rudder
Construction
Fiberglass
Ballast type
Iron
Production
Years built
2010–2024
Designer
David Thomas
Builder
Cornish Crabbers Ltd

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.

Maestro Boats 319.30 mSame hull familyNear-identical lengthAn E.G. van de Stadt-designed IOR 1/2 ton racer with a high sail area-to-displacement ratio for spirited performance
Newport 30-19.14 mSame hull familyNear-identical lengthThe original 1968 production run of this masthead sloop, featuring a fin keel and spade rudder for coastal sailing
Brresen Badebyggeri Knarr9.24 mSame hull familyNear-identical lengthA classic Erling Kristoffersen-designed fractional sloop with a deep ballast ratio, built in wood since 1946 and fiberglass since
Jeanneau Rush 319.13 mSame hull familyNear-identical lengthA Ron Holland-designed IOR half-tonner that served as the official boat for the Tour de France à la Voile
Granada Yachts 319.39 mSame hull family0.2 m longerA masthead sloop with a spade rudder and nearly 46% ballast ratio, designed for stability in a 31-foot hull
C&C Yachts 30-29.12 mSame hull familyNear-identical lengthA performance-oriented masthead sloop with a fin keel and spade rudder, designed by C&C for balanced club racing

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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