Enemy submarines still active along American Atlantic coast according to the U.S. Joint Intelligence Committee. Daily summary dated 7 April 1942

An item reported that enemy submarine activities along the American Atlantic coast between the latitudes of Cape Lookout and New York continued. There seemed to be a substantial number of submarines operating.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 118 dated 7 April 1942