Is Radio Frequency Interference to satellite navigation an active threat for aviation?

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FoxATM - Eurocontrol

GNSS is vulnerable to interruption by Radio Frequency Interference, which has massively risen in recent years – reducing the efficiency of the overall aviation system, placing a higher workload on pilots and air traffic controllers, and requiring complementary communications, navigation and surveillance services to be maintained to more demanding requirements. It also poses a serious potential risk to safety if no further mitigating actions are taken.

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