Enemy submarines probably restarting activities on the Western Atlantic theatre according to the U.S. Joint Intelligence Committee. Daily summary dated 6 April 1942

An item reported that a ship was torpedoed and sunk off the north east coast of Santo Domingo and a submarine was sighted near Aruba. The J.I.C. commented that it could be the expected restart of enemy submarine activities. But it was also possible that the submarine earlier active in the Florida Straits area moved to a new position southward or returning home. The sighting off Aruba could be an error.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 117 dated 6 April 1942.