Estonia is experiencing the challenges of Russian hybrid warfare first hand and is most likely in the direct path of any future military action by Moscow to reconstitute the former USSR. Estonia is on the frontline of efforts by the Russian government to destabilise the governments, economies and societies of the Baltic nations. Like her other Baltic neighbours, the invasion and occupation of Estonia will be key to any future attempts by Russia’s president Vladimir Putin to rebuild the former Soviet Union. So-called ‘sub-threshold’ actions by Moscow, which aim to amplify destabilisation but are short of outright war, are occurring in the electromagnetic spectrum. Estonia has witnessed recent disruption to civil aviation strongly suspected to have been caused by Russian GNSS (Global Navigation Satellite System) jamming. GNSS jamming has also caused disruption to everyday life in Estonia. Ride sharing services and food deliveries are two consumer services affected by Russian GNSS attack. At the same time, Estonia has faced regular and significant state-sponsored Russian cyberattacks. Barring a major political change in Russia, there are few signs that Moscow’s hybrid warfare against Estonia will cease any time soon. However, it is not all bad news. Domestic science and technology ingenuity is playing its part. Estonia has world-class innovation focused on nullifying and reducing the severity of nefarious Russian actions in the spectrum. Tallinn’s strategy writ large is not just to prevent Russian invasion but to deter it. In this latest edition of Armada’s Radioflash! podcast we chat about these and other issues with John Longhurst, chief executive officer of Tangent Link and longtime Estonian resident.