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Gib Sea 80 Plus Fin keel is a Racing sailboat built by Gibert Marine and designed by Jean Berret. Her first hull was built in 1978 with an overall lengh of 7.9 m or 25.11 ft long and a Deck stepped mast mast configuration.

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GIB SEA 80 PLUS FIN KEEL Sailboat Specifications​


Overall Length (LOA) m / ft7.9 m / 25.11 ft
Builder(s)Gilbert Marine
Designer(s)Jean Berret
SeriesQuarter Ton class
VersionFin keel
categoryRacing sailboat
Hull TypeMonohull
Number of Hulls Built196
First Hull Built1978
Last Hull Built1983
AppendagesKeel fin without bulb
HelmSingle tiller
RudderSingle spade rudder
CockpitClosed aft cockpit
Ballast TypeCast iron
Rigging TypeSloop Marconi 7/8
Mast LayoutDeck stepped mast
Number of Berth(s)4
Freshwater Tank Capacity lt/gal40 L / 10.6 gal
Ballast Ratio0.32


Overall Length (LOA) 7.9 m / 25.11 ft
Hull Length7.89 m / 25.11 ft
Waterline Length (LWL)6.03 m / 19.10 ft
Beam (width)2.5 m / 8.2 ft
Waterline Beam Width2.06 m / 6.10 ft
Maximum Transverse Section0.6 m² / 6 ft²
Draft1.55 m / 5.1 ft
Wetted Area12.15 m² / 131 ft²
Fore Freeboard0.86 m / 2.10 ft
Mid-Ship Freeboard0.81 / 2.8 ft
Light Displacement (MLC) 1400 kg / 3086 lb
Ballast Weight450 kg / 992 lb


Critical Hull Speed5.96 knots
Displacement-Length Ratio (DLR)181
Ballast Ratio0.32
Upwind Sail Area to Displacement24.59 m²/T / 265 ft²/T
Downwind Sail Area to Displacement37.96 m²/T / 409 ft²/T

Above Deck

Mast LayoutDeck stepped mast
Mast Height from DWL10.35 m / 34 ft
Rotating SparsNo
Number of Levels of Spreaders1
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Standing Rigging1x19 strand wire continuous
Upwind Sail Area30.77 m² / 331 ft²
Downwind Sail Area47.5 m² / 511 ft²
Mainsail Area15 m² / 161 ft²
Genoa Area15.77 m² / 170 ft²
P27.2 ft * 8.3 m
E10.2 ft * 3.1 m

Engine Room

Engine(s)Outboard engine
Engine(s) Power8 HP
Fuel typeGas

Below Deck

Maximum Headroom4.8 ft * 1.42 m
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