BoatsBonito 35

Bonito 35

Masthead Sloop · Fin Keel · 1961–1963

An early UK fiberglass pioneer from 1961, this masthead sloop features a fin keel and a heavy, stable displacement

Designed by Alan H. Buchanan, built by Seamaster Ltd.

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 45 — a heavy, notably soft motion offshore.

Comfort ratio 45
CoastalBluewater

At 1.51 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.51
LightHeavy

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

Displacement / length 471

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

  • Heavier than ~77% of boats her size on file
  • Draws less than ~84% of boats her size on file
  • Narrower than ~81% 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
Displacement / length
471.4
Comfort ratio
45.0
Capsize screening
1.51
Hull speed
6.7 kn
Pounds / inch immersion
856
Hull
Hull type
Fin Keel
Construction
FG hull/wood deck and cabin
Production
Years built
1961–1963
Designer
Alan H. Buchanan
Builder
Seamaster 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.

Maxus 3510.68 mSame hull familyNear-identical lengthA 2022 launch featuring a 1.95-metre deep-draft fin keel and bulb for offshore stability and upwind performance
Aragosa Yachts 3510.59 mSame hull familyNear-identical lengthAn aluminum-hulled masthead sloop from 1989, built to a Ted Brewer design featuring a skeg-mounted rudder
Hallberg-Rassy 35210.59 mSame hull familyNear-identical lengthA classic center-cockpit cruiser from Enderlein and Rassy, featuring a skeg-hung rudder and a stiff, stable hull
Sirius 35 DS10.60 mSame hull familyNear-identical lengthA 35-foot fractional sloop featuring a deep 1.98-metre draft and a balanced displacement-to-ballast ratio for offshore stability
S2 Yachts 35C10.72 mSame hull familyNear-identical lengthA short-lived 1986-1987 masthead sloop with a shallow 1.3-meter draft and a balanced 43% ballast ratio
Sadler Yachts 3410.59 mSame hull familyNear-identical lengthA robust masthead sloop designed by the Sadlers, featuring a skeg-hung rudder and a balanced hull for offshore 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

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