German chart of the Kattegat, published by the Oberkommando der Kriegsmarine (OKM), the Naval High Command in Nazi Germany. The cartouche includes the symbol of the OKM, as well as an OKM stamp. In both cases, the swastika has been subsequently inked over. A later stamp reads 'DHJ 1948 Kiel'. Some pencil annotations. Scale 1:400,000.