Lyce · Hybrid Watch

hw_a9444004175ff737

Persistent GNSS interference affects aircraft over eastern Latvia and the Riga area.

View this signal on the map

Throughout September 2026, aircraft operating over eastern Latvia continued to experience persistent degradation of satellite-navigation signals. FlySafe’s monitoring of the 57°N, 25°E cell, covering Vidzeme and roughly the Cēsis–Valmiera area northeast of Riga, found that 83.1% of tracked aircraft between 1 and 29 September broadcast degraded navigation integrity; individual daily readings ranged from approximately 61% to 100%. The phenomenon was not a sudden September spike: FlySafe records the same cell at elevated interference levels on every observed day since its monitoring series began on 10 August 2026, indicating a persistent electronic-warfare environment rather than a discrete one-day disruption. FlySafe The interference extended toward Riga itself, where the monitoring cell containing Riga Airport and the city averaged roughly 72.5% degraded navigation indications during September, while areas farther east toward the Russian border showed still higher levels.

Occurrence
Publication
First observed
Review status
Not assessed
Countries
Latvia
Updated

Attribution

Pattern-compatible

Facts

No facts

Sources

  1. Role
    Discovery lead
    Publication

    Throughout September 2026, aircraft operating over eastern Latvia continued to experience persistent degradation of satellite-navigation signals. FlySafe’s monitoring of the 57°N, 25°E cell, covering Vidzeme and roughly the Cēsis–Valmiera area northeast of Riga, found that 83.1% of tracked aircraft between 1 and 29 September broadcast degraded navigation integrity; individual daily readings ranged from approximately 61% to 100%. The phenomenon was not a sudden September spike: FlySafe records the same cell at elevated interference levels on every observed day since its monitoring series began on 10 August 2026, indicating a persistent electronic-warfare environment rather than a discrete one-day disruption. FlySafe The interference extended toward Riga itself, where the monitoring cell containing Riga Airport and the city averaged roughly 72.5% degraded navigation indications during September, while areas farther east toward the Russian border showed still higher levels.