DFS Deutsche Flugsicherung (DFS), the German air navigation service provider (ANSP), has successfully completed onsite testing of the Frequentis Remote Virtual Tower (RVT) solution for Saarbücken Airport, with control services to be carried out from the Remote Tower Centre in Leipzig, 400 kilometers away. A two-week testing phase took place with a multi-day flight programme in various weather conditions with air traffic controllers testing the image quality, the performance of automatic object detection as well as camera tracking during the day and at night.