Navigation failures are no longer isolated incidents, with weeks of recurring interference affecting transport, tracking systems, and civilian drones across Poland.

In Poland, widespread disruptions to satellite navigation, including GPS, became more frequent in the summer of 2026. Poland’s National Institute of Telecommunications links the interference to external electronic warfare activity near the Baltic Sea.

Disruptions to global navigation satellite systems (GNSS) in the country have been regularly recorded since January 2024. However, since the beginning of 2026, the frequency and intensity of the interference have increased significantly.

How Often GPS Disruptions Were Recorded in Poland

In May and June, prolonged outages across all GNSS bands were observed on around 70% of days. Only 10% of days in May and 13% of days in June passed without any interference.

During the first 19 days of August 2026, significant satellite navigation problems were recorded on 63% of days. The prolonged nature of the disruptions was also confirmed by independent measurements from Blue Dot Solutions.

In July, stations in Pomerania recorded interference lasting nearly 90 hours in total. It affected the L1 band, which is important for civilian GPS use.

What Satellite Navigation Interference Affects

GPS disruptions can cause problems not only for navigation apps on smartphones. Devices may incorrectly determine their coordinates, lose the satellite signal, or fail to calculate a route.

The interference also complicates the operation of public and shared transport, as well as bicycle and vehicle tracking systems. Civilian drone flights face particular risks, as they require precise positioning.

Likely Sources of Signal Jamming

Experts from Gdańsk University of Technology, Gdynia Maritime University, and the Institute of Telecommunications believe that the main sources of navigation signal jamming and spoofing may be located in the Kaliningrad region.

To monitor the situation, Poland is developing an interference monitoring system based on the ASG-EUPOS network. The Polish Space Agency also plans to deploy a separate network of sensors to help detect GNSS disruptions more quickly and assess their scale.