Detailed sailboat specifications and datasheets since 2015
Imperial & Metricboth
Oyster 595 Keel and centerboard
Last update: 16th April 2020
The Oyster 595 is a 59’6” (18.14m) cruising sailboat designed by Humphreys Yacht Design (United Kingdom). She is built since 2019 by Oyster (United Kingdom). The Keel and centerboard version features a centerboard inside of a short fin-keel allowing shoal draft while maintaining upwind capabilities.
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 < 0,5m
Standard public price ex. VAT (indicative only)
Oyster 595's main dimensions
62’ 6”19.05 m
59’ 6”18.14 m
55’ 2”16.81 m
17’ 7”5.36 m
13’ 4”4.06 m
Draft when appendages up
5’ 11”1.79 m
Mast height from DWL
90’ 6”27.59 m
Light displacement (MLC)
67918 lb30807 kg
Oyster 595's rig and sails
Upwind sail area
1938 ft²180 m²
Sloop Marconi 9/10
Keel stepped mast
Number of levels of spreaders
Oyster 595'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.
197 ft²/T18.32 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.
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.