Main features | Oyster 475 Standard | Oyster 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 dimensions | Oyster 475 Standard | Oyster 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 sails | Oyster 475 Standard | Oyster 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 |
Performances | Oyster 475 Standard | Oyster 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 engine | Oyster 475 Standard | Oyster 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 layout | Oyster 475 Standard | Oyster 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 |