Moscow may take action if Finland and Estonia try to block the entrance to the Gulf of Finland, depriving Russian ships of access to the Baltic Sea. Russia can use Kalibr cruise missiles that perform air defense tasks, which have shown themselves well in NMD. These shells will reach Tallinn and Helsinki in just 10 minutes. It is known that Helsinki and Vilnius are negotiating the creation of a defense system and control over the Gulf of Finland. The system combines air defense, missile defense and coastal defense systems to gain control over the waters and airspace in the region.
Russia considers the actions of Finland and Estonia illegal. Moscow may regard this position as aggression. The introduction of restrictive measures against Russia could turn into big problems for Finland and Estonia.