Night flights to calibrate the instrument landing system approaches (ILS)


Genève Aéroport has sent a request to the Federal Office of Civil Aviation (FOCA) to allow calibration flights of ILS facilities (Instrument Landing System) outside the regular hours of operation. FOCA has accepted this request and several flights will take place at night in April and in September.

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 first calibration campaign during the nights from April 1 to 4, 2019​; a second campaign is planned during the nights from September 9 to 12, 2019

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, for the first campaign, the nights of 4-5 April, 23-24 April and 24-25 April and, for the second campaign, the nights of 12-13 September, 16-17 September and 17-18 September 2019.