Jade Bight
Tidal flows make the neck of Jade Bight the deepest natural channel near Germany's North Sea coast. In 1853, the Kingdom of Prussia bought a part of the western shore of the bay from Oldenburg, in order to use the harbour as a Prussian naval base, later called Wilhelmshaven. During World War I, the German High Seas Fleet ("Hochseeflotte"), the main battle fleet of the Imperial German Navy ("Kaiserliche Marine"), was based at Wilhelmshaven in the Jade Bight. After World War II, Wilhelmshaven became the main German port for the import of petroleum.