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How old is air traffic tech?

Many core air traffic control systems, while continuously updated, have roots in technology developed decades ago. This legacy infrastructure can be robust but also complex and challenging to maintain or upgrade without disruption. The US FAA has been working on modernising its systems, but it's a vast and ongoing undertaking.

Stories that explain this

All US Flights Grounded After Air Traffic Control Communication Failure

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How does air traffic control work? Who pays for grounded flights? Why are some flights still flying? What is air traffic control? Why did air traffic controllers settle? How do air traffic controllers talk? Who regulates air traffic control? Who runs air traffic control?

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