BoatsChassiron TM

Chassiron TM

Masthead Ketch · Long Keel · 1974–1982

A 13-metre masthead ketch with a long keel, designed by Joubert-Nivelt for stable, long-distance cruising

Designed by Michel Joubert & Joubert-Nivelt, built by E Richard.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Long 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 34 — a sea-kindly motion in a seaway.

Comfort ratio 34
CoastalBluewater

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

Capsize screening 1.78
LightHeavy

290 — heavy for her waterline, built to carry stores and ride steadily.

Displacement / length 290
EasygoingPowered-up

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

Sail area / displacement 19.3
TenderStiff

34% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 34%

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

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
33.6%
Rig & sail area
Rig
Masthead Ketch
Ratios
SA / displacement
19.3
Displacement / length
289.8
Comfort ratio
33.8
Capsize screening
1.78
Hull speed
7.7 kn
Pounds / inch immersion
1481
Hull
Hull type
Long Keel
Construction
Fiberglass
Production
Years built
1974–1982
Units built
120
Designer
Michel Joubert, Joubert-Nivelt
Builder
E Richard

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.

Islander Yachts Freeport 4112.50 mSame hull family0.6 m shorterA long-keeled staysail ketch derived from the Islander 40MS, featuring an interior redesign by Robert Perry
Whitby Boatworks 4212.80 mSame hull family0.3 m shorterAn Edward S. Brewer-designed long-keeled ketch built for offshore comfort and stability over a long production run
Island Packet 4012.19 mSame hull family0.9 m shorterA 12.19-meter cutter featuring a 1.42-meter draft that balances offshore stability with shoal-water accessibility
Morgan Yachts Out Island 4112.57 mSame hull family0.5 m shorterA prolific long-keeled masthead sloop designed by Charles Morgan Jr. that became a staple of the global charter trade
Morgan Yachts 4513.92 mSame hull family0.9 m longerA long-keeled masthead sloop with a high comfort ratio, built by Charles Morgan Jr. between 1966 and 1970
Baba 4012.14 mSame hull family0.9 m shorterA 13-ton cutter with a 41.5 comfort ratio, built between 1980 and 1982 for steady, long-distance passage making

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

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