Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from July 31, 1945. The overlay contains annotations regarding Japanese submarines I-147, I-158, I-161, I-162, I-353, I-363, I-366, I-367, I-400, I-401, and midget submarine number 424, coastal defense vessel Habushi, auxiliary subchaser number 34 Yousen, Convoy Hazo-5, United States task Group 73.4, Task Force 38 and 39, Commander of Pacific Ocean Areas, Commander of 3rd Fleet, Commander of Destroyer Squadron 25, Radio in Guam, and Soviet Union Scooner Mees Caw. Significant events visible on the map include I-147 and I-367 patrolling on line Marianas and Okinawa, I-158 and I-353 patrolling area, Task Force 39 sweeping area Juneau - July and August, Task Force 38 refueling and moving to launch, and Commander of Destroyer Squadron 25 bombarding.