BoatsLm 27

Lm 27

Masthead Sloop · Long Keel · 1972–1986

The builder's most successful model, this 8.35-metre masthead sloop features a long keel and a 45% ballast ratio

Designed by Palle Mortensen.

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.

Shoal draftDraws 0.95 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 30 — a moderate, middle-of-the-road motion.

Comfort ratio 30
CoastalBluewater

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

Capsize screening 1.75
LightHeavy

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

Displacement / length 312
EasygoingPowered-up

12.2 — modest power for her weight; easygoing rather than lively, and happier with a breeze.

Sail area / displacement 12.2
TenderStiff

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

Ballast 45%

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

  • Draws less than ~87% of boats her size on file

Compared with 312 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
45.0%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
12.2
Displacement / length
311.6
Comfort ratio
29.7
Capsize screening
1.75
Hull speed
6.5 kn
Pounds / inch immersion
751
Hull
Hull type
Long Keel
Construction
Fiberglass
Production
Years built
1972–1986
Units built
1535
Designer
Palle Mortensen
Builder
LM Glasfiber A, S

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.

Vancouver 278.23 mSame hull familyNear-identical lengthA Robert B. Harris-designed cutter with a long keel, built across two continents to provide a stiff, comfortable passage
Nor'Sea Marine 278.23 mSame hull familyNear-identical lengthA masthead sloop with a versatile rig and ballast configuration, designed for trailerable offshore cruising
Cape Dory 288.56 mSame hull family0.2 m longerA classic Carl Alberg full-keel masthead sloop designed for steady, comfortable cruising
Pearson Yachts-USA Triton8.63 mSame hull family0.3 m longerA Carl Alberg-designed long-keel fractional sloop that pioneered fiberglass cruising and saw international production.
Alberg 309.22 mSame hull family0.9 m longerA 25-year production classic with a heavy displacement-to-length ratio that remains a capable choice for offshore passages
Pacific Seacraft Dana 248.31 mSame hull familyNear-identical lengthA heavy-displacement W.I.B. Crealock cutter designed for offshore stability and serious coastal 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

Two ways to keep looking — both search what the fleet has actually recorded.

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