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Oyster 565 Keel and centerboard is a Offshore cruising sailboat built by Oyster and designed by Humphreys Yacht Design. Her first hull was built in 2019 with an overall lengh of 18.09 m or 59.5 ft long and a Keel stepped mast mast configuration.

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OYSTER 565 KEEL AND CENTERBOARD Sailboat Specifications​


Overall Length (LOA) m / ft18.09 m / 59.5 ft
Builder(s)Oyster Marine Ltd.
Designer(s)Humphreys Yacht Design
VersionKeel and centerboard
categoryOffshore cruising sailboat
CountryUnited Kingdom
Hull TypeMonohull
First Hull Built2019
Last Hull BuiltStill in production
AppendagesCenterboard pivoting centerboard in the keel
HelmTwin helm wheels
RudderTwin spade rudders
CockpitCenter cockpit
Rigging TypeSloop Marconi (in-mast furling mainsail) 9/10
Mast LayoutKeel stepped mast
Number of Cabin(s)3
Number of Head(s)2
Freshwater Tank Capacity lt/gal750 L / 198.1 gal
Ballast Ratio26.28


Overall Length (LOA) 18.09 m / 59.5 ft
Hull Length17.22 m / 56.6 ft
Waterline Length (LWL)15.93 m / 52.4 ft
Beam (width)5.13 m / 16.10 ft
Draft3.96 m / 13 ft
Light Displacement (MLC) 25570 kg / 56372 lb
Maximum Displacement25570 kg / 56372 lb
Ballast Weight6720 kg / 14815 lb


Critical Hull Speed9.69 knots
Capsize Screening Formula (CSF)1.76
Comfort Ratio37.32
Displacement-Length Ratio (DLR)179
Ballast Ratio26.28
Sail Area to Displacement19.3
Upwind Sail Area to Displacement18.9 m²/T / 203 ft²/T

Above Deck

Mast LayoutKeel stepped mast
Mast Height from DWL24.73 m / 81.1 ft
Rotating SparsNo
Number of Levels of Spreaders2
Spreaders AngleSwept-back
Spars ConstructionAluminum spars
Standing Rigging1x19 strand wire discontinuous
Reported Sail Area164.00 m² / 1765.28 ft²
Upwind Sail Area164 m² / 1765 ft²

Engine Room

Engine(s)1 inboard engine
Engine(s) Power150 HP
Fuel typeDiesel
Fuel Tank Capacity950 L / 251 gal

Below Deck