All 15 Eurofighter Typhoons stationed in Zeltweg in Styria, have undergone an upgrade programme in 2013. They have been equipped with an enhanced hardware and software so that they conform to the latest capability standard for Tranche 1 aircraft.
Eurofighter Typhoon aircraft are used for Quick Reaction Alert (QRA) with six customers (Germany, UK, Italy, Spain, Austria, Saudi Arabia) seven days a week around the clock. From January 2015, four Eurofighter Typhoons of the Spanish Air Force and four aircraft of the Italian Air Force have been in use in the Baltics to secure the airspace over Estonia, Latvia and Lithuania as part of the "Baltic Patrols" mission. Previously, the German Luftwaffe had four Eurofighter Typhoons stationed in Estonia and committed to policing airspace from there.”