Thought Catalog

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On every aircraft, it is required by the law to carry and/or install the emergency locator transmitter (better known as ELT) in case of an emergency. This device is about the size of your shoebox, and it transmits radio signals to the satellites, which then relays its location to the ground control to aide with the search and rescue (SAR) efforts. The signals had transmitted through both VHF (121.5MHz) and UHF (243.0MHz) bandwidths, but these were phased out to increase the efficiency of the system (i.e. decreasing the amount of resources wasted on false alarms). Almost all ELTs are now transmitted through the 406MHz bandwidth to increase the responsiveness of the system.

One of the distinction features of ELT is its activation method. It will be activated if it registers enough amount of G-force on its module (usually 5Gs), or if the module comes in contact with water. There…

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