BoatsComet 770

Comet 770

Masthead Sloop · Fin With Rudder On Skeg · 1973–1978

A Jean-Marie Finot-designed IOR quarter-tonner with a high sail-area-to-displacement ratio for spirited club racing

Designed by Groupe Finot & Jean Marie Finot (Groupe Finot), built by Comar.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin With Rudder On Skeg

See her sail

The Comet 770, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Maurizio and the sail

Is it for you?

Character

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

LivelySea-kindly

Her moderate displacement on a moderate beam gives 15 — a quick, lively motion that feels every wave.

Comfort ratio 15
CoastalBluewater

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

Capsize screening 2.28
LightHeavy

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

Displacement / length 250
EasygoingPowered-up

23.1 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 23.1
TenderStiff

44% of her weight is ballast — stiff, standing up well to her sails.

Ballast 44%

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

What the fleet has seen

The Comet 770, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Comet 770 is a 7.7-meter masthead sloop designed by Groupe Finot and built by Comar Yachts between 1973 and 1978, originally as an IOR 1/4 ton racer. With a fin keel and rudder on skeg, it displaces 1610 kg. Aboard "Maurizio and the sail," a Comet 770 is sailed on Lake Garda, where its crew demonstrates single-handed reefing in 15–17 knots of wind, noting that an autopilot or second crew member is essential for solo reefing because the boat bears away uncontrollably under genoa alone.1:31 The same crew also details a single-handed marina departure procedure, emphasizing engine warm-up and line preparation for wind-against-bow conditions.watch Pre-sail safety checks on this model include inspecting all shrouds, forestay, and backstay fittings for cotter pin integrity, as a missing cotter pin can lead to dismasting.0:54 Wrapping chainplates is recommended to prevent jib sheets from snagging and dislodging cotter pins.2:33

The living fleet

Sailed by the fleet

The channels sailing this model, and where they were last seen.

Seen 5 times across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

On the water

The Comet 770 on video

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
43.7%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
23.1
Displacement / length
250.3
Comfort ratio
15.1
Capsize screening
2.28
Hull speed
5.8 kn
Pounds / inch immersion
573
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Years built
1973–1978
Designer
Groupe Finot, Jean Marie Finot (Groupe Finot)
Builder
Comar

Boats like this, on the water

More boats like her, on the water

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.

Cal 257.62 mSame hull familyNear-identical lengthA flush-deck masthead sloop featuring a pop-top companionway that became one of the most popular models in the fleet
Puma 277.95 mSame hull family0.3 m longerA Ron Holland-designed masthead sloop with a fin keel and spade rudder, built for performance-oriented coastal cruising
Dehler Yachts 25CR7.50 mSame hull family0.2 m shorterA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance
J Boats Tillotson Pearson J/247.32 mSame hull family0.4 m shorterThe world's most popular one-design keelboat, featuring a light 1406kg displacement for responsive, agile handling
Newport 27S8.23 mSame hull family0.5 m longerA 1974 masthead sloop with a 1.3-meter draft, offering a stable fin-keel platform for shoal-water coastal cruising
Martinique 257.70 mSame hull familyNear-identical lengthA Brazilian-built masthead sloop with a 44% ballast ratio, offering a stiff and stable platform for coastal cruising

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.

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The fleet has more to say

Search what's been said about the Comet 770, or ask a specific question — the answer comes back written out, with links to the moments it draws on.

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