BoatsWhitby 45

Whitby 45

Masthead Sloop · Fin keel, spade rudder · 1968–1970

A George Cuthbertson-designed masthead sloop with a high ballast ratio, built for offshore stability and speed

Designed by George Cuthbertson & C&C Design.

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 heavy displacement on a narrow beam gives 37 — a sea-kindly motion in a seaway.

Comfort ratio 37
CoastalBluewater

At 1.67 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.67
LightHeavy

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

Displacement / length 296
EasygoingPowered-up

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

Sail area / displacement 17.7
TenderStiff

48% of her weight is ballast — stiff, standing up well to her sails.

Ballast 48%

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

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
48.3%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
17.7
Displacement / length
295.7
Comfort ratio
36.7
Capsize screening
1.67
Hull speed
7.7 kn
Pounds / inch immersion
1415
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Ballast type
Lead
Production
Years built
1968–1970
Units built
16
Designer
George Cuthbertson, C&C Design
Builder
Whitby Boat Works 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.

Lafitte Yachts 4413.51 mSame hull family0.2 m shorterA Robert Perry-designed cutter with a skeg-hung rudder, built for high-quality offshore cruising
Gulfstar Yachts 4413.62 mSame hull familyNear-identical lengthA masthead sloop designed by Richard C. Lazzara, featuring a fin keel with a skeg-mounted rudder for offshore stability
Amel Maramu 4613.80 mSame hull familyNear-identical lengthA 13.8-metre ketch produced throughout the 1980s, balancing a moderate displacement with a stable, sea-kindly motion
Cal Boats 46 III (1975)13.87 mSame hull familyNear-identical lengthA masthead ketch variant of the Lapworth hull, configured with a shallow 1.52-metre draft for coastal cruising
Cal Boats 2-4613.87 mSame hull familyNear-identical lengthFeaturing a midships engine room and expanded living quarters, this 46-foot cruiser prioritizes interior volume
Catalina Yachts 44513.54 mSame hull family0.2 m shorterA 13.5-metre fractional sloop featuring a deep 2.11-metre fin keel with bulb and spade rudder for coastal stability

The family

Boats like this

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

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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