Title: The Silent Service
Subjects: World war, 1939-1945, naval operations, british, Great britain, royal navy, history, World war, 1914-1918, naval operations, submarine, World war, 1939-1945, naval operations, submarine, Sailors, History, World War, 1914-1918, British Naval operations, World War, 1939-1945, Naval operations, Submarine, Naval Military operations, Marine, Unterseeboot, Geschichte 1901-2001, Great Britain. Royal Navy. Submarine Command, Great Britain