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SJ-30 (OYSTER) built by Oyster Marine (UK)/Verlvale Ltd (UK) and designed by Stephen Jones. Her first hull was built in 1979 with an overall lengh of 9.27 m or 30.42 ft long

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OYSTER SJ-30 Sailboat Specifications​


Overall Length (LOA) m / ft9.27 m / 30.42 ft
Builder(s)Oyster Marine /Verlvale Ltd
Designer(s)Stephen Jones
CountryUnited Kingdom
Hull TypeFin w/spade rudder
First Hull Built1979
Ballast TypeLead
Rigging TypeFractional Sloop
Freshwater Tank Capacity lt/gal76 L / 20 gal
Ballast Ratio40.97


Overall Length (LOA) 9.27 m / 30.42 ft
Waterline Length (LWL)7.62 m / 25.00 ft
Beam (width)3.28 m / 10.75 ft
Draft1.62 m / 5.33 ft
Light Displacement (MLC) 2948 kg / 6500 lb
Maximum Displacement2948 kg / 6500 lb
Ballast Weight1208 kg / 2663 lb


Capsize Screening Formula (CSF)2.31
Comfort Ratio15.96
Displacement-Length Ratio (DLR)185.71
Ballast Ratio40.97
Sail Area to Displacement18.89

Above Deck

Estimated Forestay Length10.53 m / 34.54 ft
Reported Sail Area38.09 m² / 410.00 ft²
Total Sail Area38.10 m² / 410.11 ft²
Mainsail Area22.47 m² / 241.81 ft²
I33.00 ft * 10.06 m
J10.20 ft * 3.11 m
P36.50 ft * 11.13 m
E13.25 ft * 4.04 m
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