GNSS Centre of Excellence has attended an international conference InAir2013 on 7.11 and 8.11.. The conference, focusing on current issues and trends in air transport, was organized by the Department of Air Transport of the University of Žilina in cooperation with the Slovak Civil Aviation Authority. The conference was organized on the occasion of the sixtieth anniversary of the University foundation and of the twentieth anniversary of the Civil Aviatiton Authority. Experts from almost all European countries (Germany, Austria, Czech Republic, Slovakia, Hungary, Slovenia, Croatia, Malta) attended the conference. Our colleague Mr. Tomáš Duša represented the Centre, promoting its activities, services and goals, as well as the project of implementation approach procedure at small airports using GNSS navigation signals refined by European SBAS system - EGNOS.