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.
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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 🇮🇳 ✈️ ➖➖➖➖➖➖➖➖