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SONATA 7 built by Investigator Yachts PTY.LTD.(AUS) and designed by Jim Voysey. Her first hull was built in 1976 with an overall lengh of 6.90 m or 22.64 ft long

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SONATA 7 Sailboat Specifications​


Overall Length (LOA) m / ft6.90 m / 22.64 ft
Builder(s)Investigator Yachts PTY Ltd
Designer(s)Jim Voysey
Hull TypeSwing Keel
Number of Hulls Built210
First Hull Built1976
Last Hull Built1986
Rigging TypeMasthead Sloop
Ballast Ratio39.84


Overall Length (LOA) 6.90 m / 22.64 ft
Waterline Length (LWL)5.97 m / 19.59 ft
Beam (width)2.45 m / 8.04 ft
Draft1.37 m / 4.49 ft
Light Displacement (MLC) 1027 kg / 2264 lb
Maximum Displacement1027 kg / 2264 lb
Ballast Weight409 kg / 902 lb


Capsize Screening Formula (CSF)2.45
Comfort Ratio10.62
Displacement-Length Ratio (DLR)134.44
Ballast Ratio39.84
Sail Area to Displacement22.32

Above Deck

Estimated Forestay Length9.05 m / 29.68 ft
Reported Sail Area22.30 m² / 240.00 ft²
Total Sail Area22.26 m² / 239.64 ft²
Mainsail Area9.46 m² / 101.88 ft²
I28.00 ft * 8.53 m
J9.84 ft * 3.00 m
P23.26 ft * 7.09 m
E8.76 ft * 2.67 m
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