In 2000 it was decided to uninstall the warning lamps and install again an aerial lighthouse visible by airplanes at 80 km. of distance. In Finland the aerial lighthouse that was built in 1929 on top of the Suomenlinna Church by the aviation authorities in Helsinki, is still in use. The main masts of Mühlacker radio transmitter and the former Konstantynów Radio Mast also have aircraft warning lights at the outermost bases of their anchor guys.