A "power-deployed reserve parachute" is essentially a backup chute that can be deployed quickly and efficiently in the event of an emergency. Synonyms for this term might include "emergency chute," "backup chute," or "safety parachute." Other related terms might include "precautionary chute," "reserve safety device," or "emergency backup system." Regardless of the specific terminology used, the underlying idea is that the power-deployed reserve parachute represents an important safety precaution that can help to prevent serious injury or even death in the event of an unexpected equipment malfunction or other emergency situation during skydiving or other high-altitude activities.