EASA reissued its GNSS jamming and spoofing Safety Information Bulletin on 3 July, the fourth revision since 2022 and the first since July 2024. SIB 2022-02R4 concludes that interference has shown 'further increase in the severity of its impact, as well as an overall growth of intensity and sophistication', and names the affected geography plainly: the south and eastern Mediterranean, Black Sea, Middle East, Baltic Sea and Arctic, the corridors that carry a large share of executive and government air movement.
The headline judgement is about spoofing. Jamming announces itself: systems lose GNSS and crews notice. Spoofing feeds counterfeit position, navigation and timing data that can look normal, and EASA's assessment is that 'detection of spoofing may be more difficult and not immediate for the flight crew, thus posing more safety risk than jamming'. Documented knock-on effects run from spurious terrain pull-up alerts to corrupted ADS-B, misleading positions on the flight deck and EFB, and clock or fuel-computation errors that persist after leaving the affected area.
The revision adds four practical strands: standardised pilot-ATC phraseology for reporting jamming and spoofing events (Appendix 1), integration of EFB technology including interference-awareness apps, new operational and training requirements, and ATC capacity management. EASA also maintains a live list of affected flight information regions on its website, updated against the last 7 and 30 days.
Operator implication: for any tasking with a private or charter air movement through these corridors, treat degraded and deceptive GNSS as a standing planning factor. Brief flight departments that normal-looking position and timing data can be false rather than merely absent; confirm crews are current on the new reporting phraseology and that EFB interference overlays are in the kit; and check the EASA FIR list during route planning the same way you would check weather. Diversions and reroutes around affected regions are a routine contingency now, not an edge case.
