Oyster 565's main features
Model
Oyster 565
Version
Standard
Hull type
Monohull
Category
Offshore cruising sailboat
Sailboat builder
Sailboat designer
Country
United Kingdom
Construction
Hull and deck: GRP (glass reinforced polyester)
First built hull
2019
Last built hull
Still in production
Appendages
Keel : L-shaped keel (with bulb)
Helm
Twin helm wheels
Rudder
Twin spade rudders
Unsinkable
No
Trailerable
No
EC design category
iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)
A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5mA
Standard public price ex. VAT (indicative only)
Oyster 565's main dimensions
Overall length
59’ 5”18.09 m
Hull length
56’ 6”17.22 m
Waterline length
52’ 4”15.93 m
Beam (width)
16’ 10”5.13 m
Draft
8’ 2”2.5 m
Mast height from DWL
81’ 1”24.73 m
Light displacement (MLC)
56372 lb25570 kg
Oyster 565's rig and sails
Upwind sail area
1765 ft²164 m²
Rigging type
Sloop Marconi (in-mast furling mainsail) 9/10
Mast configuration
Keel stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire discontinuous
Oyster 565's performances
Upwind sail area to displacement
iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.
The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.
Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.203 ft²/T18.9 m²/T
Displacement-length ratio (DLR)
iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length:
a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.179
Critical hull speed
iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.9.69 knots
Oyster 565's auxiliary engine
Engine(s)
1 inboard engine
Engine(s) power
150 HP
Fuel type
Diesel
Fuel tank capacity
251 gal950 liters
Oyster 565's accommodations and layout
Cockpit
Center cockpit
Cabin(s)
3
Berth(s) (min./max.)
6 / 8
Head(s)
2
Freshwater tank capacity
198.1 gal750 liters
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