From 1933 to 1945, "Stettin" was used in German Navy (Kriegsmarine) service on the Oder River between Stettin and Swinemünde (Świnoujście), as well as on the Baltic Sea. On the night of 8 April 1940, "Stettin" participated in the capture of Copenhagen by participating in a surprise landing of German troops in Copenhagen together with the railway ferry/minelayer "Hansestadt Danzig". "Stettin" is also one of two or three surviving vessels of the east Prussia evacuation fleet.