Poland reports surge in GNSS jamming along Baltic coast

Poland’s National Institute of Telecommunications has reported a sharp escalation in deliberate GNSS jamming along the Baltic coast, specifically around the Tri-City area including Gdańsk, Gdynia, and Sopot. Data from the first 19 days of August 2026 shows that full-band interference occurred on 63% of days, causing failures in satellite navigation for civilian receivers, mobile phones, municipal fleets, and commercial drones.

The institute noted a drastic increase in interference since the beginning of 2026. While anomalies have been tracked in the region since January 2024, the frequency and severity have deteriorated significantly, with May and June seeing all-band interference on 70% of days. The disruptions range from single-band degradation to multi-hour, full-spectrum blackouts.

While the institute’s recent analysis attributed the activity to external electronic warfare in the Baltic Sea region, previous reports from the Polish Civil Aviation Authority and researchers from Gdynia Maritime University and Germany’s Aerospace Center have linked Baltic GNSS disruptions to Russian-origin operations. Such interference also impacts precision timing and positioning required for ground-based radar calibration and satellite laser ranging stations.