What is the purpose of the automatic activation device (AAD)?

The purpose of the automatic activation device (AAD) is to serve as a backup for emergency procedures. An AAD is designed to automatically deploy the reserve parachute if the jumper has not initiated the deployment of the main parachute at a predetermined altitude and descent rate. This safety mechanism is especially critical in situations where a jumper may be incapacitated or unable to respond, ensuring that they have a means of descent protection.

While the AAD does play a role in ensuring a safe descent, it is specifically aimed at acting during emergencies instead of enhancing performance or supporting main parachute deployment. However, it does not aid in transitioning from freefall to canopy; rather, it primarily functions to activate the reserve parachute unless the jumper has successfully deployed their main parachute. Thus, the main focus remains on its role as a safety device, reinforcing its identity as a backup to emergency procedures.