The Sonata was designed by David Thomas, and is a One-Design, Cruiser-Racer Class.
Mechanical power is provided by a demountable outboard motor mounted on a sliding bracket on the port side of the transom.
The same hull was used later with different deck mouldings for other models, including the Hunter Horizon 23.
The 6 m (20 ft) Hunter Medina is a scaled-down trailer sailer version of the Sonata design.
The Sonata is a National class in the United Kingdom and is raced across the country.