Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from July 21, 1945. The overlay contains annotations regarding Japanese submarines I-14, I-47, I-53, I-58, I-367, I-373, I-400, HA-202, and HA-205, IJN Radio in Guam, hospital ship Hikawa Maru, auxiliary gunboat Hetan Maru, coastal defense vessel Kantu, coastal defense unit number 31, unknown type of ship Kenon Maru, USS Scabbardfish (SS-397), USS Threadfin (SS-410), Commander of the Hawaii Sea Frontier, Task Forces 37, 38, 39, 95, and 92, Commander Destroyer Squadron 61, Task Group 30.8, Commander 3rd Fleet, US Ultra, and Commander Task Unit 30.5.6. Significant events visible on the map include Commander of the 3rd Fleet ordering Task Force 37 and 38 to replenish, Commander Destroyer Squadron 61 conducting anti-shipping sweep, Task Group 30.8 meeting with Task Force 37 and 38, Task Force 39 sweeping area Juneau - July and August, USS Threadfin sinking 2 IJN sea trucks with gunfire, US PBYs attacking IJN costal defense unit #31, Us aircraft attacking Kenon Maru and Hetan Maru, IJN Radio in Guam predicting typhoon heading NE on 1944, and Task Force 92 conducting anti-shipping sweep.