BoatsThom Cat 23

Thom Cat 23

Gaff head Cat · Keel/centreboard · 2006–2010

A 23-foot keel-centerboard cruiser featuring a high sail-area-to-displacement ratio for responsive handling

Designed by Menger & Sweisguth, built by Thompson Boatworks.

LOA
Beam
Draft (max)
Displacement
Hull type
Keel/Cbrd.

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

Shoal draftDraws 0.76 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 beamy beam gives 22 — a moderate, middle-of-the-road motion.

Comfort ratio 22
CoastalBluewater

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

Capsize screening 2.15
LightHeavy

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

Displacement / length 299
EasygoingPowered-up

20.0 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.0

Powered-up and quick to accelerate — this one likes to sail.

  • Heavier than ~97% of boats her size on file
  • Draws more than ~80% of boats her size on file
  • Beamier than ~98% of boats her size on file

Compared with 621 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
Rig & sail area
Rig
Gaff head Cat
Ratios
SA / displacement
20.0
Displacement / length
299.0
Comfort ratio
21.6
Capsize screening
2.15
Hull speed
6.2 kn
Pounds / inch immersion
762
Hull
Hull type
Keel/Cbrd.
Construction
Fiberglass
Production
Years built
2006–2010
Designer
Menger, Sweisguth
Builder
Thompson Boatworks

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.

Paceship Yachts Westwind 247.29 mSame hull family0.4 m longerA Ted Hood-designed masthead sloop with a keel-centerboard configuration, built for versatility in shoal waters
O'day 23-26.93 mSame hull familyNear-identical lengthA masthead keel-centerboard sloop produced in Brazil and the U.S. for over a decade as a popular coastal cruiser
Macgregor 26X7.87 mSame hull family1.0 m longerA water-ballasted sail-power hybrid designed for versatile coastal cruising and easy trailering
Cal Boats 247.43 mSame hull family0.6 m longerThe inaugural Jensen Marine Cal model, this fractional keel-centerboard sloop was built for shoal-water versatility
Marshall Marine Corporation Sanderling5.54 mSame hull family1.3 m shorterA gaff-rigged catboat based on a 1941 design, featuring a shallow-draft keel-centerboard hull for versatile day sailing

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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