German air traffic control (DFS) has announced that it will conduct survey flights on the northern runway of BER during the night of 11 to 12 October. A relatively quiet twin-engine Beechcraft Super King Air 350 propeller aircraft will be used. During the survey flights, the aircraft will take off and land in an easterly direction, frequently flying over certain regions in succession and at low altitudes. Overflights of towns and villages are avoided as far as the specified flight profiles allow.
During the survey flights, the runway's instrument landing system (ILS) is checked for accuracy and error-free operation. The ILS supports the pilot in daily flight operations with navigation during the approach. This is essentially done using signalling devices on the ground, which send information about the approach course and glide angle to the aircraft's cockpit during landing.
The specially equipped measuring aircraft checks the precision of the signals required for safe landings. As usual, the survey flights take place at night, as air traffic does not permit this during the day and the ILS cannot be used for operational purposes during the flight survey.
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