SS Magdapur was a cargo ship mined and sunk off Thorpeness, Suffolk, by a Nazi German submarine in the Second World War.The SS Magdapur sailed for the Brocklebank Line.On 10 September 1939, 1 week after the declaration of war, she was underway in ballast from Tyne to Southampton, her master was Arthur Dixon. On that day she struck by a mine laid by the Nazi German U-boat U13. She sank at 17:25.