The historical submarine boat U-434 is one of the few non-atomic submarines of the world. Since 2003 the submarine bearing the codename `Buki` can be visited and is available as a location. The Studio Hamburg Production “Rettungsflieger”, an emergency and rescue production run, used to shoot here. Until April 2002, the submarine boat used to belong to the Russian north-armada for 30 years and was a subject of utmost secrecy. The submarine boat has been used for a large number of missions, for instance spying missions at the American East coast or patrol tours in the Soviet Union. In extreme cases, it can deep dive almost 400 meters. The visitor is guided through the complicated technological functions by easy written blackboards. It is an exciting overview of the world of spy and life under water.