[1][2][3][4] The boat was built by Investigator Yachts in Australia starting in 1979, but the design is out of production.
[1][4] The Sonata 8 is a small recreational keelboat, built predominantly of fiberglass, with wood trim.
It has a fractional sloop rig, a transom-hung rudder and a lifting or optionally fixed fin keel.
The fixed keel version has a draft of 5.2 ft (1.6 m).
[4] After its introduction in 1979 the design was raced in Australia as a one-design class.