BoatsCal Boats T/4

Cal Boats T/4

Masthead Sloop · Fin w/transom Hung Rudder · 1971–1972

An IOR 1/4 ton racer featuring a 50% ballast ratio for stability in a compact 7.37-metre hull

Designed by C. William Lapworth, built by Jensen Marine.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/transom Hung Rudder

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 1,814 kg of hull, so roughly 2,400 kg on a trailer: check that against your own towing rating.
LivelySea-kindly

Her moderate displacement on a moderate beam gives 18 — a quick, lively motion that feels every wave.

Comfort ratio 18
CoastalBluewater

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

Capsize screening 2.02
LightHeavy

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

Displacement / length 193
EasygoingPowered-up

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

Sail area / displacement 16.3
TenderStiff

50% of her weight is ballast — stiff, standing up well to her sails.

Ballast 50%

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

  • Narrower than ~77% of boats her size on file

Compared with 1398 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
50.0%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
16.3
Displacement / length
192.8
Comfort ratio
17.6
Capsize screening
2.02
Hull speed
6.1 kn
Pounds / inch immersion
600
Hull
Hull type
Fin w/transom hung rudder
Construction
Fiberglass
Production
Years built
1971–1972
Units built
238
Designer
C. William Lapworth
Builder
Jensen Marine, Cal Boats

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.

Jeanneau Sun Odyssey 24.27.30 mSame hull familyNear-identical lengthA Jacques Fauroux-designed fractional sloop built for coastal cruising with a stable fin-and-bulb keel
Martinique 257.70 mSame hull family0.3 m longerA Brazilian-built masthead sloop with a 44% ballast ratio, offering a stiff and stable platform for coastal cruising
Cal 257.62 mSame hull family0.3 m longerA flush-deck masthead sloop featuring a pop-top companionway that became one of the most popular models in the fleet
Maxi Yachts 777.70 mSame hull family0.3 m longerThe most popular model in the builder's history, offering both inboard and outboard engine options for versatile cruising
Jaguar 257.62 mSame hull family0.3 m longerA Frank Butler-designed masthead sloop with a deep fin keel, offering a similar layout to the popular Catalina 25
Dehler Yachts 25CR7.50 mSame hull familyNear-identical lengthA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance

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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