Boat-Specs.com

Sailboat specifications and datasheets

Oyster 475 shoal draft

The Oyster 475, here in "shoal draft" version, is a 47’6” monohull sailboat designed by Kim Holman and Donald Pye. She was built by Oyster (United Kingdom) and made of GRP (glass reinforced polyester). The production started in 2012 .

The Oyster 475 is as well listed, on Boat-Specs.com, in version Standard.

Oyster 475 Oyster 475 sailplanOyster 475 layoutOyster 475 layoutOyster 475 sailingOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodationsOyster 475 accommodations
Oyster 475's   Main Features
Model Oyster 475
Version Shoal draft
Type of hull Monohull
Category Offshore cruising sailboat
Shipyard
Designer Kim Holman
Donald Pye
Construction GRP (glass reinforced polyester)
First built hull 2012
Last built hull Still in production
Appendages Keel :
L-shaped keel (with bulb)
Helm 1 wheel
Rudder 1 rudder on skeg
Cockpit Central cockpit
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) About
975 000
(2016)
Oyster 475's   Main dimensions
Length overall 48’ 7”
Hull length 47’ 6”
Waterline length 40’ 7”
Beam (width) 14’ 6”
Draft 5’ 8”
Mast height from DWL 62’ 5”
Light displacement 35274 lbs
Oyster 475's   Rig and sails
Upwind sail area 1293 sq.ft
Rigging type Sloop Marconi masthead
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum
Number of levels of spreaders 3
Spreaders angle Swept-back
Oyster 475'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.
18.91
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.
240
Righting moment @ 30°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
73777 lbs.ft
Maximum righting momentiThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
95476 lbs.ft @ 50.00 °
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.
8.53 knots
Oyster 475's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 75 HP
Fuel type Diesel
Fuel tank capacity 198.1 gal
Oyster 475's   Accommodation
Cabin(s) (min/max) 2 / 3
Berth(s) (min/max) 4 / 8
Head(s) 2
Fresh water tank capacity 171.7 gal

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