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Jamming: Polish researchers suspect GPS jammers on ships in the Baltic Sea

According to a study, the GPS interference observed in the Baltic Sea is technically sophisticated and apparently also originates from the Russian shadow fleet.

Ships sailing in the eastern Baltic Sea are at least partly responsible for the massive disruptions to satellite navigation systems such as GPS in the region that have been complained about since the end of 2023 at the latest. They identified two primary types of interference: from June to September, the team mainly encountered so-called multi-constellation jamming, which affects several GNSS systems. This is consistent with reports of relevant special equipment found on ships in the Russian shadow fleet, such as the Eagle S. The tanker is suspected of having severed the Estlink2 submarine cable between Finland and Estonia in December.

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