Final answer:
Back automatic parachutes generally use the Capewell release system, which enables a parachutist to promptly disconnect the parachute canopy from the harness for safety during landing or emergencies.
Step-by-step explanation:
The type of canopy quick release used on back automatic parachutes is typically a Capewell release system. This system allows a parachutist to disconnect the parachute canopy from the harness quickly in the event of an emergency or when landing to prevent being dragged by the wind if the parachute cannot be collapsed. The Capewell release consists of two parts, each inserted through the risers of the parachute. It is designed to release the canopy with a simple pulling action on the release handles, which separate the hook-shaped fittings from the risers, allowing for a quick and efficient release.