 This concept then evolved into the "Su-27IB" (Su-34 "Fullback") for the Soviet Air Force.The naval trainer had a revised forward fuselage to accommodate a side-by-side cockpit seating arrangement with crew access via a ladder in the nose-wheel undercarriage and enlarged canards, stabilisers, fins and rudders.The wings had extra ordnance hard-points and the fold position was also moved further outboard.