Enemy submarine activities along the North American coastline according to the U.S. Joint Intelligence Committee. Daily summary dated 3 April 1942

An item reported that in the month March the enemy submarines in the Western Atlantic Theater concentrated their activities along the North American coastline between the Virginia Capes and Cape Lookout, North Carolina even during the last few days.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 114 dated 3 April 1942.