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Sailboat Specifications

Thom Cat 15

Gaff Head Cat · Centerboard (Trunk)

Designed by Menger · Built by Menger Boatworks/Thompson Boatworks · First built 2001

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LOA 15.00 ft  ·  Beam 7.00 ft  ·  Displacement 700.00 lb  ·  Sail Area 145.00 ft²  ·  Gaff Head Cat  ·  Centerboard (Trunk)
About the Thom Cat 15 Sailboat

Designed as a compact and accessible small sailboat, the Thom Cat 15 falls into the category of trailerable daysailers well-suited for inland lakes, sheltered bays, and calm coastal waters. With limited specification data widely available, the Thom Cat 15 remains a somewhat obscure design, though its modest size suggests it was built with beginner-friendly sailing and casual recreational use in mind rather than competitive racing or bluewater adventure. Boats of this class typically appeal to sailors looking for an affordable entry point into the sport or those seeking a low-maintenance vessel that can be easily trailered and launched without a large crew or elaborate infrastructure. The Thom Cat 15 likely rewards solo or two-person sailing in light to moderate conditions, making weekend outings and relaxed daysailing its natural environment. For prospective buyers, tracking down original builder documentation or connecting with current owners through sailing forums may be the best path to uncovering detailed specifications and firsthand impressions. Despite its relative obscurity, the right buyer may find the Thom Cat 15 a charming and practical choice for simple, enjoyable time on the water.

Dimensions & Specifications
LOA (Length Overall) 15.00 ft / 4.57 m
LWL (Waterline Length) 15.00 ft / 4.57 m
Beam 7.00 ft / 2.13 m
Max Draft 3.50 ft / 1.07 m
Min Draft 0.58 ft / 0.18 m
Displacement 700.00 lb / 318 kg
Sail Area (Reported) 145.00 ft² / 13.47 m²
Design & Construction
Hull Type Centerboard (Trunk)
Rigging Type Gaff head Cat
Construction FG
Designer Menger
Builder Menger Boatworks/Thompson Boatworks
First Built 2001
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Frequently Asked Questions

What is the Thom Cat 15's sail area to displacement ratio?

The Thom Cat 15 has a Sail Area to Displacement ratio (SA/D) of 29.47. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Thom Cat 15's comfort ratio?

The Thom Cat 15 has a Ted Brewer Comfort Ratio of 5.4. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Thom Cat 15 safe for offshore sailing?

The Thom Cat 15 has a Capsize Screening Formula value of 3.16. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Thom Cat 15?

The theoretical hull speed of the Thom Cat 15 is 5.19 knots, calculated from its waterline length.

How much does a Thom Cat 15 weigh?

The Thom Cat 15 has a displacement of 700.00 lb and a length overall (LOA) of 15.00 ft.

Who designed the Thom Cat 15?

The Thom Cat 15 was designed by Menger, first built in 2001.