The Oyster 625, here in "shoal draft" version, is a 62’5” monohull sailboat designed by Rob Humphreys. She was built by Oyster (United Kingdom) and made of GRP (glass reinforced polyester). The production started in 2011 and has been awarded the title of "European Yacht of the Year - Category : Luxury Cruiser" in 2012.
2012European Yacht of the Year - Category : Luxury Cruiser
GRP (glass reinforced polyester)
First built hull
Last built hull
Still in production
Keel : L-shaped keel (with bulb)
1 rudder on skeg
Standard public price ex. VAT (indicative only)
2 680 000 €
Oyster 625's Main dimensions
Mast height from DWL
Oyster 625's Rig and sails
Upwind sail area
Sloop Marconi 19/20
Deck stepped mast
Mast and boom in Aluminum
Number of levels of spreaders
Oyster 625's Performances
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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.
Hull speediAs 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.