International civil aviation standards require a regular check of the proper functioning and accuracy of the navigation aids on airports. For this purpose, a specially equipped plane is used to make a series of approaches for landing. In Switzerland calibration flights are conducted under the monitoring of Skyguide, the authority responsible for airspace surveillance.
As calibration flights during the day are likely to disrupt air traffic, Genève Aéroport has requested from FOCA a special permission to plan them overnight, after the closure of the airport. FOCA has given a positive answer to this request by considering that calibration flights effectively disrupt air traffic and render flight operations more complicated.
Thus, Genève Aéroport has permission to organise a calibration campaign during the nights of 17-18 September and 18-19 September 2018
In case of additional needs or weather hazards Genève Aéroport has obtained approval to conduct measurement flights during the backup nights. In essence, these are the nights of 19-20 September, 20-21 September, 8-9 October and 9-10 October 2018.
Night flights to calibrate the instrument landing system (ILS) will be held from 19 to 20 September as scheduled in case of needs.
Communication from the Federal Office of Civil Aviation (FOCA)