Working at Cologne Cathedral - Inspection of the South Tower with a Multicopter

In the morning hours of 13 October 2014, CRN Management GmbH from Bonn, together with its partners Height-Tech GmbH from Bielefeld and pmp Projekt GmbH from Hamburg, carried out an aerial survey of parts of the south tower with a multicopter under the brand name "airspector" on behalf of the Cologne Cathedral Construction Works.