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.

Islander Yachts Bahama 309.12 mSame hull familyNear-identical lengthA 1973-1985 production masthead sloop sharing its hull with the Islander 30 MKII and featuring a balanced fin keel
C&C Yachts 30-1 (1-506)9.14 mSame hull familyNear-identical lengthWith a 12-year production run, this masthead sloop stands as the longest-built model in the C&C lineup.
Pearson Yachts 309.08 mSame hull familyNear-identical lengthA Bill Shaw-designed masthead sloop with over 1,000 hulls built, balancing a stiff 43% ballast ratio for coastal cruising
Tartan Marine 309.12 mSame hull familyNear-identical lengthA Sparkman & Stephens masthead sloop offering versatile interior configurations and a choice of standard or tall rigs
CS 309.14 mSame hull familyNear-identical lengthA Tony Castro-designed masthead sloop that became the most popular model in CS Yachts history
Seafarer Yachts 309.13 mSame hull familyNear-identical lengthA masthead sloop available with a tall rig and keel centerboard, distinct from the earlier Tripp-designed model

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Keep looking

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