BoatsHerreshoff Manufacturing Seawanhaka One-Design

Herreshoff Manufacturing Seawanhaka One-Design

Fractional Sloop · Long Keel w/trans. Hung Rudder · First built 1916

A 1916 Nathanael Herreshoff design, this fractional sloop features a long keel and classic lines for one-design racing

Designed by N. G. Herreshoff & Nathanael G. Herreshoff.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Long Keel w/trans. Hung Rudder

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

TrailerableBeam 2.13 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,724 kg of hull, so roughly 2,300 kg on a trailer: check that against your own towing rating.Shoal draftDraws 0.99 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her heavy displacement on a moderate beam gives 26 — a moderate, middle-of-the-road motion.

Comfort ratio 26
CoastalBluewater

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

Capsize screening 1.80
LightHeavy

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

Displacement / length 414
EasygoingPowered-up

17.3 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 17.3
TenderStiff

32% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 32%

A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.

  • Narrower than ~75% of boats her size on file

Compared with 106 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
31.6%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
17.3
Displacement / length
414.2
Comfort ratio
25.6
Capsize screening
1.80
Hull speed
5.4 kn
Pounds / inch immersion
400
Hull
Hull type
Long keel w/trans. hung rudder
Construction
Wood
Ballast type
Lead
Production
Years built
First built 1916
Designer
N.G.Herreshoff, Nathanael G. Herreshoff
Builder
Herreshoff Manufacturing

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.

Flicka 207.32 mSame hull family1.2 m longerA Bruce Bingham-designed cutter with a long keel, originally offered as amateur plans before becoming a production classic
Bristol Yachts 247.49 mSame hull family1.4 m longerA Paul Coble-designed masthead sloop with a long keel and over 50% ballast ratio for stable coastal cruising
Jeanneau Cap 5405.40 mSame hull family0.7 m shorterA 5.4-metre fractional sloop featuring a long keel and 0.64m draft, built by Jeanneau starting in 1986

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.

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