German submarines mainly active Florida Straits or the Eastern Caribbean according to the U.S. Joint Intelligence Committee Daily summary dated 5 May 1942

Möltenort, Germany U-Boat Memorial for German submarine sailors died in both world wars

Original postcard

An item reported that around 35 miles north east of Tortugas a tanker was torpedoed in the Gulf of Mexico. Despite the fact that the main part of the enemy submarines were positioned west of the Azores in latitudes north of Charleston, South Carolina were most of the attacks in the Florida Straits or the Eastern Caribbean.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 146 dated 5 May 1942.