Enemy submarine attacked about 40 miles east of Cape Henry, USA according to the U.S. Joint Intelligence Committee. Daily summary dated 21 December 1941

An item referred to OPNAV reporting that on 17 December a sound contact with an enemy submarine about 40 miles east of Cape Henry, USA was made followed by an inconclusive depth charge attack by NOA.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 11 dated 21 December 1941.