An Emergency Locator Transmitter (ELT) is an emergency beacon used in aircrafts to alert rescue authorites and to indicate the location and the identity of an aircraft in distress.
Most civil aircrafts are required to carry them. Modern ELTs operates on 406 MHz. The signal of the ELT is detected by the COSPAS-SARSAT satellite network anywhere in the world. The network passes the alert to the nearest rescue authority. The COSPAS-SARSAT satellite network can detect the location of the ELT with an accuracy of 2 to 5 km. There are also 406 MHz ELTs available with an integrated GPS navigation receiver. These ELTs will transmit an accurate location. The ELT also transmits a low-power "homing" signal on 121.5 MHz. This allows rescue forces to home in on a beacon as soon as they are in the vicinity. The ELT transmits the identity of the aircraft. This identity is a 15 character hexadecimal code including the ICAO 24 bit code of the aircraft. It is important to register the ELT with the associated identity at the local authority. ➖➖➖➖➖➖➖➖ Follow @metaldoctor_vishal 🇮🇳 ✈️ ➖➖➖➖➖➖➖➖