Finland's Coast Guard said it has detected constant disturbances to satellite navigation signals in the Baltic Sea since April and in recent weeks has seen tankers spoofing their location data to cover up visits to Russia.Last week, Finland's interior minister Lulu Ranne said Finland believes Russia is behind disturbances detected in Finland and the Baltic Sea region in the Global Navigation Satellite System (GNSS) and Global Positioning System (GPS) signals used in navigation.The Coast Guard said the GNSS jamming…