Japanese submarine activities according to the U.S. Joint Intelligence Committee. Daily summary dated 13 January 1942

An item reported that radio intelligence pointed out that seven enemy submarines were present between Hawaii and Johnston Islands and in the vicinity of Midway Island with submarine activities east of Hawaii relaxed.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary dated 13 January 1942 No. 34