The Twister is a masthead rigged sloop, length 28 feet (8.5 metres), beam 8 feet 1 inch (2.46 metres), draft 5 feet (1.5 metres). It has a full length keel and a full-depth transom-hung rudder which is tiller steered.
Total displacement (empty) is about 10,000 lb (4.5 t), of which 4,600 lb (2.1 t) is encapsulated lead ballast.
This sailing yacht was designed in 1963 by the English yacht architect C.R. (Kim) Holman.