Map overlay documenting the activities of the US Naval operations, Japanese ships, cargo ships, and weather patterns from August 3, 1945. The overlay contains annotations regarding Japanese submarines I-47, I-58, I-353, I-363, I-366, and I-367, coastal defense vessel Hako, USS Gato (SS-212), Task Group 73.4 and 94.1, Task Force 37 and 38, Task Unit 34.8.2, Radio in Guam, and Radio in Manila. Significant events visible on the map include Task Group 73.4 damaging 8 luggers, Task Group 94.1 sinking 700 ton TFD, USS Gato torpedoing Kaibokan, I-353 patrolling area midway between Leyte Gulf and Okinawa, I-366 and I-158 patrolling area north of Palau, I-367 and I-147 patrolling between Marainas and Okinawa, Radio in Manila changing to North Force, Task Force 38 launching position, Task Force 38 and 37 withdrawing to avoid typhoon, Task Unit 34.8.2 bombarding, Okinawa air striking south of Kyushu and Task Force 93 striking Kobe, Nagoya being cancelled because of weather.