Unknown submarine sighted in the Portland Channel, Maine, USA according to the U.S. Joint Intelligence Committee. Daily summary dated 1 January 1942

An item reported that an army observer sighted a submarine periscope in the Portland Channel, Maine, USA moving to the sea. Unconfirmed.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 22 dated 1 January 1942