https://en.wikipedia.org/wiki/List_of_shipwrecks_in_September_1940
List of shipwrecks: 4 September 1940 Ship Country Description Corbrook United Kingdom World War II: Convoy FS 271: The collier (1,729 GRT, 1929) was torpedoed and sunk in the North Sea off Happisburgh, Norfolk by S-21 ( Kriegsmarine).All crew were rescued. Fulham V United Kingdom World War II: Convoy FS 271: The cargo ship (1,562 GRT, 1939) was torpedoed and sunk in the …