Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from January 23, 1945. The overlay contains annotations regarding the USS Baltimore (CA-68), USS Boston (CA-69), USS Hancock (CV-19), USS Langley (CVL-27), USS New Jersey (BB-62), USS Barb (SS-220), USS Rainier (AE-5), 14th Air Force, 21st Bombardment Squadron, Commander in Chief of the East Indies, Commander of the 20th Air Force, Commander of the 3rd Fleet, Commander of the 5th Air Force, Commander of Fleet Air Wing 4, Commanding General of the Pacific Ocean Area, Commander of Naval Group China, Commander Task Group 73.1, Commander Task Group 73.6, Commander Task Group 73.7, Destroyer Division 43, Destroyer Squadron 52, Task Force 38, Task Group 38, Task Group 38.6, Task Unit 30.1.10, Japanese submarine chaser Kainan Maru No. 7, cargo ship Yamabishi Maru No. 8, carrier Amagi, Coastal Defense Vessel No. 130, tanker CDV Manju, transport ship Hakozaki Maru, cargo ship Hoshi maru, carrier Katsuragi, gunboat Manyo Maru, convoy Mota-32, convoy Mota-33, aircraft carrier Ryuho, cargo ship Saishu, convoy Tamo-37, destroyer Ume. Significant events visible on the map include the USS Barb causing a "terrific explosion" and sinking three ships.