Enemy submarine sighted off Marthas Vineyard, USA according to the U.S. Joint Intelligence Committee. Daily summary dated 8 January 1942

An item reported that warships and aircraft were searching in the Atlantic Ocean for a large enemy submarine was sighted at noon 7 January around 25 miles south of Marthas Vineyard.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 29 dated 8 January 1942