Catapults 1 and 2 can be seen to the left in this photo. Catapults 3 and 4, also known as the 'Waist Cats', are incorporated into the same area as the landing strip, and thus are not used for launching aircraft when recovery operations are in progress. If an aircraft happens to miss all 4 arresting gear cables, the pilot continues down the landing strip and flies off the waist, to circle around and try again. In order to accomodate for the contingency of possibly having to take off again, the aircraft's engines are turned up to full throttle when they are attempting to land. US Navy pilots routinely practice this in an exercise known as touch-and-go.
