German submarine U-48 (1939)

German submarine U-48 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II, and the most successful that was commissioned. During her two years of active service, U-48 sank 52 ships for a total of 306,874 GRT and 1,060 tons; she also damaged three more for a total of 20,480 GRT over twelve war patrols conducted during the opening stages of the Battle of the Atlantic.