Illustrious-class aircraft carriers were designed based on effective Ark Royal, but they received reinforced armor. To comply with the treaty limitations on displacement, the hangar capacity was reduced to mere 36 aircraft. The Implacable class emerged as an improved series with the hangar capacity increased to 60 aircraft. HMS Implacable was engaged in operations against German ships in Norway and was transferred to the Pacific afterward. The aircraft carrier took part in supporting the landing on Okinawa and in operations against Japanese aviation near Honshu.