Helmut Rosenbaum was founded.[1] With Turkey remaining neutral, access via the Bosphorus was not feasible. It was decided that small vessels, torpedo boats and U-boats, should be transported from the German Bight via the Danube to the Black Sea. The predecessor to the modern Rhine–Main–Danube Canal, the 19th century Ludwigskanal, was not suitable, though, so transport via land was necessary.