The approximately 20-year-old instrument landing system ILS 34 (southern approach) is currently being replaced. In order to check the accuracy and stability of the glide path signal, measurement flights are required between 3 to 7 June and between 1 to 5 July 2024. The periodic measurement flights to check the other navigation systems will take place between 26 to 30 August 2024. The flights will take place in the afternoon and partly at night until two o'clock in the morning at the latest.

In order to check the navigation systems, approaches are required that start laterally, above and below the published flight path. For this reason, the survey flights sometimes take place off the usual flight paths. During a survey, the respective flight path is approached several times. In the process, the signals sent by the corresponding navigation equipment are recorded and evaluated.

The measurement flights will be carried out with a twin-engine propeller aircraft of the type Beechcraft King Air 350. The aircraft is equipped with state-of-the-art navigational aids and a high-precision flight inspection device. Skyguide air traffic control is responsible for the planning and execution of the flights.