Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships on March 31st, 1945. The overlay contains annotations regarding the USS Bougainville (CVE-100), USS Mindoro (YAG-15), Commander Task Force 52 (CTF 52), Task Forces (TF) 50.18.38, 59, Commander Task Groups (CTG) 50.8, 73.2, 73.8, Commander 7th Fleet (Com7Flt), Commander 5th Air Force (COMAF 5), 21st Bomb Command (Bomcom 21), 73rd Bomb Wing (73 Bomwing), 314th Bomb Wing (314 Bomwing), Japanese merchant ships Kosei Maru, Meiji Maru, 3 Eizan Maru, Midori Maru, 5 Eizan Maru, Sokusai Maru, 7 Ikumo Maru, 8 Ikumo Maru, Daisei Maru, Fuan Maru, Hosho Maru, Yaekawa Maru, Coastal Defense Vessels (CDV) 13, 14, 39, 134, convoys Basu, HI-88 J, TSU-801, cargo ships Toyokawa Maru, Toyokuni Maru, passenger-cargo ship Awa Maru, destroyer Amatsukaze, submarines I-56, I-58, unknown class Manju, United Kingdom destroyer HMS Ursa, and German submarine U-183. Significant events visible on the map include the Commander 5th Air Force hitting Yulin, Task Force 59 to strike Sakashima Gunto, planes mining Sasebo, Kure, and Shimo, and the 73rd and 314th Bomb Wings hitting Kyushu, Omura, and Tachiara.