Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships on January 12, 1944. The overlay contains annotations regarding United States submarine USS Sturgeon (SS-187), Destroyer Division Squadron 12, Commander Task Force 33, 31st infantry division, minesweeper AM-425, Fleet Radio Unit Melbourne, Japanese transport ship Shobu Maru, Convoy H 13, submarine chasers SC 24, 39, and 31, the 18th Torokina Echelon, transport ships Nigitsu Maru and Kazura Maru, auxiliary transport Hozukawa Maru, destroyers Amagiri, Tanikaze, Sazanami, Akebono, Tachikaze, Umikaze, Tanikaze, and Ushio, battleship Yamato, cargo ships Yamamiya and Nissho Maru, oilers Nippon Maru and Myosho Maru, FU-Convoy, tanker Kokuyo Maru, ship Ritono Maru, submarine I-185, torpedo boat Otori Maru, transport and gunboat Mayo Maru, merchant cruiser Aikoko Maru, cruiser Miyako, and vessel Taicho. Significant events visible on the map include the Kokuyo Maru being escorted, the destroyer division squadron 12 commencing bombardment and the central task force 33 destroying orange concentrations.