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Oyster 675 Standard is a Offshore deck saloon cruising sailboat built by Oyster and designed by Humphreys Yacht Design. Her first hull was built in 2014 with an overall lengh of 21.07 m or 69.1 ft long and a Deck stepped mast mast configuration.

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OYSTER 675 STANDARD Sailboat Specifications​


Overall Length (LOA) m / ft21.07 m / 69.1 ft
Builder(s)Oyster Marine Ltd.
Designer(s)Humphreys Yacht Design
categoryOffshore deck saloon cruising sailboat
CountryUnited Kingdom
Hull TypeMonohull
First Hull Built2014
Last Hull BuiltStill in production
AppendagesKeel L-shaped keel (with bulb)
HelmTwin helm wheels
RudderTwin spade rudders
CockpitCenter cockpit
Rigging TypeSloop Marconi 9/10
Mast LayoutDeck stepped mast
Freshwater Tank Capacity lt/gal1550 L / 409.5 gal


Overall Length (LOA) 21.07 m / 69.1 ft
Hull Length19.89 m / 65.4 ft
Waterline Length (LWL)18.16 m / 59.7 ft
Beam (width)5.65 m / 18.6 ft
Draft2.95 m / 9.8 ft
Light Displacement (MLC) 37500 kg / 82673 lb
Maximum Displacement37499 kg / 82672 lb


Critical Hull Speed10.34 knots
Capsize Screening Formula (CSF)1.71
Comfort Ratio41.91
Displacement-Length Ratio (DLR)177
Sail Area to Displacement20.87
Upwind Sail Area to Displacement20.44 m²/T / 220 ft²/T

Above Deck

Mast LayoutDeck stepped mast
Mast Height from DWL30.75 m / 100.11 ft
Rotating SparsNo
Number of Levels of Spreaders3
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Reported Sail Area228.91 m² / 2464.00 ft²
Upwind Sail Area229 m² / 2465 ft²

Engine Room

Engine(s)1 inboard engine
Engine(s) Power180 HP
Fuel typeDiesel
Fuel Tank Capacity1900 L / 501.9 gal