Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from July 26, 1945. The overlay contains annotations regarding Japanese submarines I-13, I-14, I-58, I-147, I-158, I-353, I-367, I-400, and I-401, coastal defense vessels number 38 and 60, destroyer Harutsuki, auxiliary storeship Kaikukuten Maru, transports number 137 and 172, subchasers number 19 and 49, aircraft carrier Hosho, Commander Cruiser Division number 22, patrol boat number 2, unknown type of ship Kaito, USS Barb (SS-220), Commander of 7th Fleet, Task Group 73.1, Task Forces 39 and 38, Commander of 5th Air Force, Commander of 20th Air Force, Commander of Submarines Pacific, and Commander Task Unit 19.6.1. Significant events visible on the map include I-147 and I-367 Patrolling on line Marianas and Okinawa, I-58 and I-353 patrolling area, Commander of 7th Fleet reporting being attacked, Task Force 39 sweeping area Juneau - July and August, Commander of 5th Air Force destroying IJN Sea Craft Launchers, freighter transport carrier, and 2 luggers, Commander of 5th Air Force sinking IJN sea truck and torpedo boat, USS Barb sinking a trawler, Task Force 38 proceeding to refuel, Commander of 20th Air Force setting a fire to 2 large and 1 small IJN ships and battleship, 10 B-29s attacking Commander of Submarines Pacific, patrol boat #2 sinking torpedo, Task Unit 19.6.1 striking, and I-13 sinking on July 16, 1945.