Federal Aviation Administration and EASA regulations require an approved method of escape on all aircraft exits where the floor is 6 feet (1.8 m) or more above the ground).[1] There are also design requirements for passengers to be able to evacuate within certain limits; typically 90 seconds for large aircraft.[2] An evacuation slide is an inflatable slide that both allows people to descend safely from the exit and has a sufficiently high use rate to meet the evacuation timings. Escape slides are the reference means of compliance with the regulation although some cargo aircraft use different methods.