The German Air Traffic Control (DFS) has announced survey flights on the southern runway of BER for the night of 20 to 21 January. A quiet twin-engine propeller aircraft of the type Beechcraft Super King Air 350 will be used for the survey flights, which will take off and land in a westerly direction. Certain regions are often flown over in succession and at low altitudes. Overflights of towns and villages are avoided as far as the given flight profiles allow.
During the survey flights, the instrument landing system (ILS) of the runway is checked for accuracy as well as error-free functioning. The specially equipped measuring aircraft checks the precision of the signals required for safe landings. In daily airport operations, the ILS assists pilots with navigation during the approach. Essentially, this is done by signal transmitters on the ground that send information about the approach course and glide angle to the aircraft's cockpit during landing.
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