A Joensuu-bound plane that departed from Helsinki was unable to land on Tuesday morning, due to GPS navigation interference.
The plane was scheduled to touch down in Joensuu at 7.40am, but was forced to return to Helsinki, which triggered knock-on effects on flights between the two cities.
"GPS interference prevented the aircraft from landing," said Tapio Nurmela from Fintraffic's air navigation services.
When landing at Joensuu airport, planes rely on the satellite-based navigation system, which uses signals from satellites orbiting the Earth to pinpoint their location.
The plane circled in the air for around 15 minutes for the GPS devices to regain functionality before the pilot turned the plane back to Helsinki Airport.
As a result, the next flight from Joensuu to Helsinki was cancelled because of the earlier flight's return to Helsinki. MP Hanna Räsänen (Cente) was one of the passengers on the cancelled flight, she announced on social media.
Finnair arranged bus transportation for Joensuu passengers to Helsinki. However, some like Räsänen opted to take a train for a speedier arrival in the capital.
"Of course, it's infuriating, especially since there's a high probability that this is another case of Russian hybrid influence," she said.
Last week, news emerged that farm tractors on the eastern border are not getting correct positions from global positioning systems due to suspected Russian interference.
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