V 305 Ostpreussen was a German fishing trawler that was requisitioned in the Second World War by the Kriegsmarine for use as a vorpostenboot and later a Vorpostensicherungsboot.

[1] Ostpreussen was built at yard number 526 by Deschimag Seebeckwerft, Wesermünde for the Nordsee Deutsche Hochseefischerei AG, Cuxhaven.

The fishing boat registration PG 487 was allocated,[3] as were the Code Letters DFCB.

[3] On 17 November 1942, she went to the assistance of the cargo ship Hindenburg, which had struck a mine in the Baltic Sea off Utö, Finland.

In January 1957, she was sold to F. Hansen, Emden, West Germany and renamed Stella Maris.