The Oyster 675
is a 65’4” (19.89m) cruising sailboat designed by Humphreys Yacht Design
(United Kingdom). She is built since 2014 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.
The Oyster 675
is as well listed, on Boat-Specs.com, in Standard
version (see all the versions compared
Oyster 675's main features
Keel and centerboard
Offshore deck saloon cruising sailboat
Hull and deck: GRP (glass reinforced polyester)
First built hull
Last built hull
Still in production
Centerboard : pivoting centerboard in the keel
Twin helm wheels
Twin spade rudders
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 < 0,5m
Standard public price ex. VAT (indicative only)
Oyster 675's main dimensions
69’ 1”21.07 m
65’ 4”19.89 m
59’ 7”18.16 m
18’ 6”5.65 m
14’ 8”4.48 m
Draft when appendages up
6’ 2”1.9 m
Mast height from DWL
100’ 11”30.75 m
Light displacement (MLC)
93829 lb42560 kg
Oyster 675's rig and sails
Upwind sail area
2465 ft²229 m²
Sloop Marconi 9/10
Deck stepped mast
Number of levels of spreaders
Oyster 675'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.
202 ft²/T18.79 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.
Oyster 675's auxiliary engine
1 inboard engine
Fuel tank capacity
501.9 gal1900 liters
Oyster 675's accommodations and layout
4 / 5
8 / 10
3 / 4
Freshwater tank capacity
409.5 gal1550 liters
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