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Experts say that Russia is causing disruption to satellite navigation systems affecting thousands of civilian flights. The Baltic Sea, the Black Sea and the eastern Mediterranean - the regions where Russia's military has been most active - have seen an increase in disruption to the Global Positioning System (GPS). This has left aircraft unable to receive GPS signals.
In March, a RAF plane carrying Defence Secretary Grant Shapps had its GPS signal jammed while flying close to Russian territory. The persistent disruption led Finland's flag carrier Finnair to suspend daily flights to Estonia's second largest city, Tartu, for a month, after two of its aircraft had to return to Helsinki due to GPS interference.
Tartu Airport relies solely on GPS, unlike most larger airports which have alternative navigation systems that allow aircraft to land even if the signal is lost.
According to Cyrille Rosay, a senior cybersecurity expert at the European Union Aviation Safety Agency (EASA), while the problem existed before the Russian invasion of Ukraine in February 2022 it is worsening. The EASA now clocks "several thousand incidents" per year, Mr Rosay said.
When asked where the blame lies, officials from the Baltic states don’t hesitate.
"The source of interference is Russia,” Estonia's Foreign Minister Margus Tsahkna said in an interview. ''We have proof that it is coming from Russia, and Russia is violating all the international agreements."
Mr Tsahkna said the sources of interference were located near the Russian cities of St Petersburg, Kaliningrad and Pskov.
Online investigators agree, saying GPS jammers are likely located halfway between St Petersburg and Estonia and near the Russian enclave of Kaliningrad on the Baltic Sea – where the RAF plane carrying Defence Secretary Grant Shapps was when its signal was jammed.
There have also been reports of maritime traffic in the Baltic Sea being affected by GPS interference.
Lewis Musonye
