SS Oster
 SS Oster is a Norwegian steamship built in 1908 by Christianssands Mekaniske Værksted for the Indre Nordhordlandske Dampskibsselskab. She sailed between Bergen and Osterfjorden in Norway with passengers and goods from 1908 until World War II when she was acquired as a guard ship by the Royal Norwegian Navy and later by the German Navy. After the war the vessel was in need of maintenance and modernization before she could be put back in service in 1956.