An Alex McGruer-designed masthead sloop featuring a swing keel for versatile shoal-water cruising
Designed by Alex McGruer.
LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Swing Keel
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
TrailerableBeam 2.44 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,452 kg of hull, so roughly 2,050 kg on a trailer: check that against your own towing rating.Shoal draughtDraws 0.72 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly
Her light displacement on a moderate beam gives 14 — a quick, lively motion that feels every wave.
Comfort ratio 14
CoastalBluewater
2.17 — right around the 2.0 line, the edge between coastal and offshore.
Capsize screening 2.17
LightHeavy
156 — light for her waterline, so she is easily driven and quick to accelerate.
Displacement / length 156
EasygoingPowered-up
17.8 — moderate power for her weight; steady, all-round performance.
Sail area / displacement 17.8
TenderStiff
32% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.
Ballast 32%
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
The record
Full specifications
The complete reference set — tap any figure to switch between metric and imperial.
Dimensions
Weights
Ballast / displacement
32.3%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
17.8
Displacement / length
155.8
Comfort ratio
14.3
Capsize screening
2.17
Hull speed
6.1 kn
Pounds / inch immersion
598
Hull
Hull type
Swing Keel
Construction
Fiberglass
Ballast type
Lead
Production
Years built
1971–1976
Units built
450
Designer
Alex McGruer
Builder
Grampian Marine 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.
Cal Boats 247.43 mSame hull family0.3 m longerThe inaugural Jensen Marine Cal model, this fractional keel-centerboard sloop was built for shoal-water versatility
Tofinou 77.01 mSame hull familyNear-identical lengthA classic fractional sloop modeled after a 1939 prototype, designed for elegant daysailing with a retractable keel
O'day 23-1 (Lift Top)7.01 mSame hull familyNear-identical lengthA popular C. Raymond Hunt-designed masthead sloop featuring a unique lift-top coach roof for added cabin headroom
Hunter Marine 2407.34 mSame hull family0.3 m longerA trailerable swing-keel cruiser featuring a B&R rig and water ballast, also marketed as the Hunter Legend 240
Chrysler Marine 226.71 mSame hull family0.4 m shorterA 6.7-metre masthead sloop produced as the C-22 and T-22 Sandpiper, featuring a swing keel for shallow-water access
