The Marinestation der Ostsee (Baltic Sea Naval Station) was a command of both the Imperial German Navy, and the Reichsmarine which served as a shore command for German naval units operating primarily in the Baltic Sea.
The original founding of the Baltic Sea Naval Station predates the existence of the modern German state.
[1] At the start of the Franco-Prussian War in July 1870, the command consisted of relatively minor forces: the flagship of Konteradmiral (Rear Admiral) Eduard Heldt was the aviso SMS Preussischer Adler, based in Kiel.
Based in Stralsund were the gunboats Blitz and Fuchs, and at Danzig was the screw corvette Nymphe.
[2] The station was a major command during World War I and continued to exist, under the administration of the Weimar Republic, through the 1920s.