Nearly her entire upper deck was devoted to the hangar. The large height and open girders of the flight deck structure allowed for stowage of spare fuselages. The hangar deck was semi-open and had large roll-up metal curtain doors which could be closed in bad weather. The open hangar was adopted to allow the installation of two catapults on the hangar deck for the launching of observation aircraft. The catapults were dropped to save cost. "Ranger" also incorporated a gallery deck between the flight deck and hangar deck.