German air traffic control (DFS) has announced that it will conduct aerial surveys on the northern runway of BER during the night of 15 to 16 November. A relatively quiet, twin-engine propeller aircraft of the type Beechcraft Super King Air 350 will be used. During the calibration flights, the aircraft will take off and land in a westerly direction, frequently flying over certain regions in succession and at low altitudes. Overflights of populated areas will be avoided as far as the specified flight profiles allow.
During the survey flights, the instrument landing system (ILS) of the runway is checked for accuracy and error-free operation. The ILS supports pilots during daily flight operations with navigation during the approach. This is mainly done by signal transmitters on the ground that send information about the approach course and glide angle to the cockpit of the aircraft during landing.
Flights are therefore generally exempt from night flight restrictions. The International Civil Aviation Organisation (ICAO) requires the ILS to be calibrated at regular intervals.
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