Allied cargo ship attacked by enemy submarine according to the U.S. Joint Intelligence Committee Daily summary dated 15 May 1942

An item reported that a cargo ship was attacked by an enemy submarine 5 miles east of the Ambrose light vessel. Submarines of the enemy seemed to be especially active on the east coast of Florida, in the Gulf of Mexico and on the trans Atlantic shipping routes eastward of Newfoundland.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 156 dated 15 May 1942