What does AED refer to in the context of emergency medical equipment on aircraft?

AED stands for Automated External Defibrillator, a critical piece of emergency medical equipment found on aircraft to respond to cardiac emergencies. This device analyzes the heart's rhythm and, if necessary, delivers an electric shock to help restore a normal heartbeat. Its accessibility and ease of use enable trained crew members to assist passengers experiencing sudden cardiac arrest effectively.

In aviation, where medical emergencies can occur far from immediate medical assistance, having an AED onboard can be lifesaving. The presence of an AED enhances the safety protocols of airlines, ensuring that flight crews are equipped to handle medical emergencies promptly and effectively.

The other options don't accurately represent this crucial equipment. They either describe non-existent devices or mischaracterize the role and function of the AED in emergency care scenarios.