Japanese naval bombers sighted 30 miles northwest of Hawaii according to the U.S. Joint Intelligence Committee. Daily summary dated 24 April 1942

An item reported that on 22 April 20.30 G.C.T./10.00 A.. Hawaiian Time three Japanese naval bombers were sighted 30 miles northwest of Hawaii flying to the east without making contact.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 135 dated 24 April 1942