Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships on June 7, 1945. The overlay contains annotations regarding United States submarine USS Blueback (SS-581), the 21st Bombardment Squadron, Commander of the 5th Air Force, Commander Air Fleet Wing 4, Commander of the 7th Fleet, Commander of the Submarine Forces in the Pacific, task groups 73.4, 73.4.2, 30.8, 38.1, and 38.4, and Japanese hospital ship Hikawa Maru, cruiser Ashigawa, SubChaser 26, coastal defense vessels 60 and Oki, cargo ships Chogei, Jinsen, Taigen Maru, and Kosu, communication boat 449, submarines HA-107, I-122, I-158, and I-36, guard boat Hanshin Maru, destroyers Harutsuki and Kamikaze, carrier Kaiyo, aircraft transport Kanto, and O-RO-N-NO. Significant events visible on the map include Air Fleet Wing 4 2 Harpoons, 4 med hitting shipping East and West coasts Paramushiro, B-29s striking Osaka, Hanshin Maru sinking, Taigen Maru striking a mine, task group 38.4 refueling from task group 20.8, and Kikisui #9 activating.