Eider Canal conservation areas. Eider Canal The Eider Canal (also called the Schleswig-Holstein Canal) was an artificial waterway in southern Denmark (later northern Germany) which connected the North Sea with the Baltic Sea by way of the rivers Eider and Levensau. Constructed between 1777 and 1784, the Eider Canal was built to create a path for ships entering and exiting the Baltic that was shorter and less storm-prone than navigating around the Jutland peninsula. In the 1880s the canal was replaced by the enlarged Kiel Canal, which includes some of the Eider Canal's watercourse. The canal's watercourse followed the border between the
History of the North Sea dumped in the Skagerrak and the Baltic, conventional weapons (grenades, mines, bazookas, and cartridges) were sunk in the German Bight. The estimates vary widely but it seems to be clear that more than a hundred thousand tons of munitions were sunk. The Maunsell Sea Forts were small fortified towers built in the Thames and Mersey estuaries during the Second World War to help defend the United Kingdom. One of which on HM Fort Roughs is now occupied by the controversial Principality of Sealand. Post Second World War period, the North Sea, bounded entirely by NATO allies became completely peaceful whilst