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Sailboat Specifications

Comet 770

Masthead Sloop · Fin With Rudder On Skeg

Designed by Groupe Finot · Built by Comar (Ita) · First built 1973

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LOA 25.25 ft  ·  Beam 8.67 ft  ·  Displacement 3,550.00 lb  ·  Sail Area 335.00 ft²  ·  Masthead Sloop  ·  Fin With Rudder On Skeg
About the Comet 770 Sailboat

Designed by the renowned French firm Groupe Finot and built by Italian manufacturer Comar during the mid-1970s, this 25-foot sailboat represents European design thinking from sailing's golden era. The Comet 770's moderate dimensions and fiberglass construction made it an accessible entry point into serious sailing for its time. With a fin keel and skeg-mounted rudder configuration, the boat strikes a balance between performance and stability that suited both weekend coastal cruising and club racing. The masthead sloop rig provides straightforward sail handling, while the substantial ballast-to-displacement ratio of nearly 44% ensures good stability and seaworthiness for a boat this size. The design's comfort ratio of 15.05 indicates a relatively stiff, quick motion that favors performance over easy cruising, making it well-suited for day sailing and short coastal passages rather than extended live-aboard cruising. The capsize screening value suggests reasonable offshore capability when properly handled, though the boat's size and vintage equipment would limit most owners to coastal waters. Groupe Finot's reputation for creating fast, seaworthy designs is evident in the Comet 770's proportions, offering sailors of the era a taste of French design philosophy in an accessible package that could handle both competitive sailing and recreational coastal exploration.

Dimensions & Specifications
LOA (Length Overall) 25.25 ft / 7.70 m
LWL (Waterline Length) 18.50 ft / 5.64 m
Beam 8.67 ft / 2.64 m
Max Draft 4.75 ft / 1.45 m
Displacement 3,550.00 lb / 1,610 kg
Ballast 1,550.00 lb / 703 kg
Sail Area (Reported) 335.00 ft² / 31.12 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Groupe Finot
Builder Comar (ITA)
First Built 1973
Last Built 1978
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Engine & Accommodations
Engine Make Faryman
Engine Type Diesel
Horsepower 7.5
Fuel Capacity 7 gals / 26 L
Water Capacity 14 gals / 53 L
Frequently Asked Questions

What is the Comet 770's sail area to displacement ratio?

The Comet 770 has a Sail Area to Displacement ratio (SA/D) of 23.09. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Comet 770's comfort ratio?

The Comet 770 has a Ted Brewer Comfort Ratio of 15.05. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Comet 770 safe for offshore sailing?

The Comet 770 has a Capsize Screening Formula value of 2.28. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Comet 770?

The theoretical hull speed of the Comet 770 is 5.76 kn knots, calculated from its waterline length.

How much does a Comet 770 weigh?

The Comet 770 has a displacement of 3,550.00 lb and a length overall (LOA) of 25.25 ft.

Who designed the Comet 770?

The Comet 770 was designed by Groupe Finot, first built in 1973.