 The Su-33 'Flanker-D' is a naval fleet defense interceptor for use on aircraft carriers.Further versions include the side-by-side two-seat Su-34 'Fullback' strike/fighter-bomber variant, and the Su-35 'Flanker-E' improved air superiority and multi-role fighter.The Shenyang J-11 is a Chinese licence-built version of the Su-27.