How is an Emergency Locator Transmitter (ELT) activated?

An Emergency Locator Transmitter (ELT) is activated primarily by a crash sensor or a manual switch. The crash sensor is designed to detect a significant impact or sudden deceleration typical of an aircraft accident. When such conditions are met, the ELT automatically transmits a distress signal that helps search and rescue teams locate the aircraft.

Additionally, pilots can also manually activate the ELT using a switch. This feature ensures that in situations where a pilot anticipates potential trouble or unplanned landing, the distress signal can be sent even without an impact.

This dual method of activation—automatic and manual—ensures that the ELT functions efficiently in emergencies, providing essential location information to rescuers. Understanding how this system operates is critical for both pilot preparedness and safety procedures in aviation.