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 (United Kingdom).
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
Model
Oyster 575
Version
Standard
Hull type
Monohull
Category
Offshore deck saloon cruising sailboat
Sailboat builder
Sailboat designer
Country
United Kingdom
Construction
Hull and deck: GRP (glass reinforced polyester)
First built hull
2010
Last built hull
2017
Appendages
Keel : L-shaped keel (with bulb)
Helm
Twin helm wheels
Rudder
Single spade rudder
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 575's main dimensions
Overall length
58’ 8”17.89 m
Hull length
57’ 6”17.53 m
Waterline length
51’ 7”15.72 m
Beam (width)
16’ 5”5 m
Draft
8’ 11”2.7 m
Mast height from DWL
82’25 m
Light displacement (MLC)
60076 lb27250 kg
Ballast weight
17857 lb8100 kg
Ballast type
Lead
Oyster 575's rig and sails
Upwind sail area
2097 ft²194.8 m²
Rigging type
Sloop Marconi masthead
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
3
Spreaders angle
Swept-back
Spars construction
Aluminum spars
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.199
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.30 %
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 1.34.9.62 knots
Oyster 575's auxiliary engine
Engine(s)
1 inboard engine
Engine(s) power
150 HP
Fuel type
Diesel
Fuel tank capacity
343.4 gal1300 liters
Oyster 575's accommodations and layout
Cockpit
Center cockpit
Cabin(s) (min./max.)
3 / 4
Berth(s) (min./max.)
6 / 10
Head(s)
2
Freshwater tank capacity
251 gal950 liters
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