BoatsSeidelmann Yachts 299

Seidelmann Yachts 299

Masthead Sloop · Fin keel, spade rudder · 1979–1981

A 9.12-metre fin-keel sloop built from 1979 to 1981, offering a balanced 2.2 capsize screening for coastal passages

Designed by J. Robert Seidelmann.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/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 beamy beam gives 20 — a quick, lively motion that feels every wave.

Comfort ratio 20
CoastalBluewater

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

Capsize screening 2.20
LightHeavy

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

Displacement / length 258
EasygoingPowered-up

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

Sail area / displacement 17.2
TenderStiff

45% of her weight is ballast — stiff, standing up well to her sails.

Ballast 45%

A balanced, easily-driven cruiser — comfortable and forgiving for coastal work.

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
45.0%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
17.2
Displacement / length
258.4
Comfort ratio
19.7
Capsize screening
2.20
Hull speed
6.6 kn
Pounds / inch immersion
943
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Production
Years built
1979–1981
Designer
J. Robert Seidelmann
Builder
Seidelmann Yachts

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.

Spirit 329.48 mSame hull family0.4 m longerA Jacques De Ridder-designed IOR 23-footer built for nearly two decades as a stiff, masthead-rigged fin-keel sloop
Islander Yachts 309.02 mSame hull familyNear-identical lengthA raised-deck masthead sloop with a shallow 1.12-metre draft, produced briefly as a distinct variant of the Islander 29
Maxi Yachts 959.50 mSame hull family0.4 m longerA 9.5-metre masthead sloop produced for a decade, featuring a skeg-hung rudder for predictable coastal handling
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
Granada Yachts 309.18 mSame hull familyNear-identical lengthA 30-foot fractional sloop with a 1.65-meter draft, designed for balanced, performance-oriented cruising
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

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.

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