EASA Warns of Ukraine GNSS Outages

18 March 2022

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Image credit: European Business Aviation Association

The European Union Aviation Safety Agency has published a Safety Information Bulletin warning of the increased probability of problems with Global Navigation Satellite Systems (GNSS) in the current context of the Russian invasion of Ukraine.

“The effects of GNSS jamming and/or possible spoofing were observed by aircraft in various phases of their flights, in certain cases leading to re-routing or even to change the destination due to the inability to perform a safe landing procedure,” the SIB stated.

Potential issues from degradation of the GNSS signal include:

  • Waypoint navigation,
  • Area navigation (RNAV) approach capability,
  • Required Navigation Performance (RNP) operations,
  • Terrain warnings, 
  • Inconsistent aircraft position on the navigation display,
  • Loss of automatic dependent surveillance-broadcast (ADS-B), wind shear, terrain and surface functionalities.

Air operators, including helicopter operators, are advised to:

  • Ensure that flight crews promptly report any observed interruption, degradation or anomalous performance of GNSS equipment (jamming and/or possible spoofing),
  • Verify the aircraft position by means of conventional navigation aids when flights are operated in proximity of the affected areas,
  • Ensure the availability of alternative conventional arrival and approach procedures.

EASA notes there are four key geographical areas where GNSS spoofing and/or jamming has intensified, namely:

  • Kaliningrad region, surrounding the Baltic Sea and neighbouring States,
  • Eastern Finland
  • The Black Sea; and
  • The Eastern Mediterranean area near Cyprus, Turkey, Lebanon, Syria and Israel, as well as Northern Iraq.

“Under the present conditions,” EASA stated, “it is not possible to predict GNSS outages and their effects.”

Read the entire EASA SIB here:


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