Due to the development in technology the trend in Schleswig-Holstein as well as in the other parts of Germany the wind turbine measure more than 100m total height. That means a permanent blinking is required day and night. To avoid refusal in the community, FHR and Dirkshof have developed an aviation warning system. On this Occasion Ingbert Liebing - Mitglied des Bundestags - visited Dirkshof, where Heiner Kuschel (FHR) and Dirk Ketelsen explained and demonstrated this new system. Mr. Liebing was very impressed and promised to lobby at appropriate places and situations for the approval.