The Kiel lighthouse stands 4 nautic miles off the coast in the central Bay of Kiel as a guidance and orientation for the entrance to the Kiel Fjord. In addition it holds numerous measurment devices, like for weather, level gauge, radio activity and is a remote pilot location. It is one out of four lighthouses in Kiel.
As said before, I was into sailing in my younger years and the Kiel Lighthouse quite often were used as a turning point in regatta sailing.
This image is as seen from the beach of Bülk / Strande.