By means of radar sites, remote data transmission, Control and Reporting Centres (CRCs) and Combined Air Operations Centres (CAOCs) the Alliance ensures constant surveillance and control of its assigned airspace 24 hours a day and 365 days a year.
[3] Since March 2004, when the Baltic States joined NATO, the 24/7 task of policing the airspace of the Baltic States was conducted on a three-month rotation from Zokniai Air Base in Lithuania and, starting from 2014, at the Ämari Air Base in Harju County, Estonia.
In 2013, the Baltic patrol was called in when the Swedish Air Force was unable to respond to a simulated attack by Russian bombers against Stockholm.
[12] In May 2014, NATO established its second air base in Estonia's Ämari near Tallinn, beginning with a Danish deployment.
[14][15] In January 2022, due to the massing of Russian military forces along its border with Ukraine; American and Danish fighter jets were deployed to the NATO Baltic Air Policing detachments in Estonia and Lithuania, respectively, to provide enhanced air policing (eAP) over the Baltic States.
[16][17] According to a former staff member of the National Defence University of Finland, the Baltic air bases are untenable in a war scenario as they lack hardened aircraft shelters, which make them vulnerable to attack.