The Oyster 575
is a 57’6” (17.53m) cruising sailboat designed by Humphreys Yacht Design
(United Kingdom). She was built between 2010 and 2017 by Oyster
The Oyster 575
is as well listed, on Boat-Specs.com, in Keel and centerboard
and Shoal draft
version (see all the versions compared
Oyster 575's main features
Offshore deck saloon cruising sailboat
Hull and deck: GRP (glass reinforced polyester)
First built hull
Last built hull
Keel : L-shaped keel (with bulb)
Twin helm wheels
Single spade rudder
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 575's main dimensions
58’ 8”17.89 m
57’ 6”17.53 m
51’ 7”15.72 m
16’ 5”5 m
8’ 11”2.7 m
Mast height from DWL
Light displacement (MLC)
60076 lb27250 kg
17857 lb8100 kg
Oyster 575's rig and sails
Upwind sail area
2097 ft²194.8 m²
Sloop Marconi masthead
Deck stepped mast
Number of levels of spreaders
Oyster 575'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.
232 ft²/T21.51 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.
Ballast ratio iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.
The higher the ballast ratio is, the greater is the stability.
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 575's auxiliary engine
1 inboard engine
Fuel tank capacity
343.4 gal1300 liters
Oyster 575's accommodations and layout
3 / 4
6 / 10
Freshwater tank capacity
251 gal950 liters
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