EASA issued Revision 4 of its Safety Information Bulletin on GNSS interference on 3 July 2026, mandating new Pilot-ATC phraseology, Electronic Flight Bag recommendations, and operational training requirements for flight crews. The update reflects a 220% rise in jamming and spoofing incidents since 2021, with severity, intensity, and sophistication escalating near conflict zones including the Eastern Mediterranean, Black Sea, Middle East, Baltic Sea, and Arctic area. GNSS interference is now a permanent operational feature, degrading navigation and surveillance capabilities and threatening aviation safety. Operators must verify aircraft position via non-GNSS means near affected areas, monitor Estimated Position Uncertainty, and report suspected events under Regulation (EU) No. 376/2014. Air Traffic Control must ensure sufficient capacity during disruptions.