Detailed sailboat specifications and datasheets since 2015
MetricSI (m)
Imperial & Metricboth
ImperialIMP (ft)

Oyster 475 (Standard) vs Oyster 475 (Shoal draft)

Main featuresOyster 475 StandardOyster 475 Shoal draft
Model
Oyster 475
Oyster 475
Version
Standard
Shoal draft
Hull type
Monohull
Monohull
Category
Offshore cruising sailboat
Offshore cruising sailboat
Sailboat builder
Oyster
Oyster
Sailboat designer
Country
United Kingdom
United Kingdom
Construction
Hull and deck: GRP (glass reinforced polyester)
Hull and deck: GRP (glass reinforced polyester)
First built hull
2012
2012
Last built hull
2018
Still in production
Appendages
Keel : L-shaped keel (with bulb)
Keel : L-shaped keel (with bulb)
Helm
Single helm wheel
Single helm wheel
Rudder
Single rudder on skeg
Single rudder on skeg
Unsinkable
No
No
Trailerable
No
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 < 0,5m
A
A
Standard public price ex. VAT (indicative only)
1167579 2016
1167579 2016
 
Main dimensionsOyster 475 StandardOyster 475 Shoal draft
Overall length
48’ 7”14.81 m
48’ 7”14.81 m
Hull length
47’ 6”14.48 m
47’ 6”14.48 m
Waterline length
40’ 7”12.36 m
40’ 7”12.36 m
Beam (width)
14’ 6”4.41 m
14’ 6”4.41 m
Draft
7’ 1”2.16 m
5’ 8”1.75 m
Mast height from DWL
62’ 5”19.03 m
62’ 5”19.03 m
Light displacement (MLC)
35274 lb16000 kg
35274 lb16000 kg
 
Rig and sailsOyster 475 StandardOyster 475 Shoal draft
Upwind sail area
1293 ft²120.1 m²
1293 ft²120.1 m²
Rigging type
Sloop Marconi masthead
Sloop Marconi masthead
Mast configuration
Keel stepped mast
Keel stepped mast
Rotating spars
No
No
Number of levels of spreaders
3
3
Spreaders angle
Swept-back
Swept-back
Spars construction
Aluminum spars
Aluminum spars
 
PerformancesOyster 475 StandardOyster 475 Shoal draft
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.
204 ft²/T18.91 m²/T
204 ft²/T18.91 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.
240
240
Righting moment @ 30°
 iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after heeling. 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.
73777 lb.ft10200 kg.m
73777 lb.ft10200 kg.m
Maximum righting moment
 iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after heeling. 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.
95476 lb.ft13200 kg.m @ 50.00 °
95476 lb.ft13200 kg.m @ 50.00 °
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.
8.53 knots
8.53 knots
 
Auxiliary engineOyster 475 StandardOyster 475 Shoal draft
Engine(s)
1 inboard engine
1 inboard engine
Engine(s) power
75 HP
75 HP
Fuel type
Diesel
Diesel
Fuel tank capacity
198.1 gal750 liters
198.1 gal750 liters
 
Accommodations and layoutOyster 475 StandardOyster 475 Shoal draft
Cockpit
Center cockpit
Center cockpit
Cabin(s) (min./max.)
2 / 3
2 / 3
Berth(s) (min./max.)
4 / 8
4 / 8
Head(s)
2
2
Freshwater tank capacity
171.7 gal650 liters
171.7 gal650 liters
 
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