Emergency Locator Transmitter (ELT)

Emergency Location Transmitter – a homing device used during emergencies. Modern ELTs turn on automatically during a crash and start to transmit a signal both on 121,1 MHz and 406 MHz, which can be intercepted by satellites. The purpose of the ELT is to allow search and rescue teams to find the wreckage of an aircraft. Normally, there is a fixed ELT which is part of the aircraft and also one or two portable ELTs, which can be removed by survivors from the aircraft.