BoatsMat 1245

Mat 1245

Fractional Sloop · Fin w/bulb & Spade Rudder · First built 2012

A Mark Mills-designed fractional sloop built for performance, featuring a high sail-area-to-displacement ratio.

Designed by Mills Design & Mark Mills, built by M. A. T.

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 light displacement on a moderate beam gives 22 — a moderate, middle-of-the-road motion.

Comfort ratio 22
CoastalBluewater

2.00 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.00
LightHeavy

158 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 158
EasygoingPowered-up

25.6 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 25.6
TenderStiff

49% of her weight is ballast — stiff, standing up well to her sails.

Ballast 49%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

  • Draws more than ~97% of boats her size on file

Compared with 2729 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
49.3%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
25.6
Displacement / length
157.5
Comfort ratio
22.3
Capsize screening
2.00
Hull speed
7.9 kn
Pounds / inch immersion
1534
Hull
Hull type
Fin w/bulb & spade rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
First built 2012
Designer
Mills Design, Mark Mills
Builder
M.A.T

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.

X Yachts X-4112.35 mSame hull familyNear-identical lengthA 12.35-meter fractional sloop with a 2.5-meter draft and a 40% ballast ratio, built for competitive one-design racing
Bavaria Yachts Match 4212.55 mSame hull familyNear-identical lengthA 12.55-metre IMS competition racer with a high sail-area-to-displacement ratio and a deep 2.15-metre bulb keel
Bavaria Yachts 40 (J&J)12.47 mSame hull familyNear-identical lengthA popular charter-trade cruiser from 2000, offering a balanced 18.88 SA/D ratio and a 1.95-metre bulb keel
Jeanneau Sun Odyssey 41512.35 mSame hull familyNear-identical lengthA 2025 Marc Lombard design featuring a fractional rig and dual rudders for modern performance cruising
Linjett 4012.35 mSame hull familyNear-identical lengthA decade-long production run defines this 12-metre performance cruiser, balancing a 44% ballast ratio for stiff sailing
Dufour Yachts 4012.32 mSame hull familyNear-identical lengthA 12.32-metre fractional sloop featuring a 1.65-metre draft and a balanced 36% ballast ratio for coastal cruising

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