Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from May 20, 1945. The overlay contains annotations regarding the USS Flicker (AMS-9), Commander Fleet Air Wing 4, Commander Task Unit 73.4.4, Commander Task Group 73.5, Commander 7th Fleet, Navy minesweeper Beemster (AMS 105), Field Requirement Unit Engineer Personnel, Commander Task Force 75, Task Force 57, US Submarine Chaser USS SC-34 Japanese destroyer Harutsuki, submarine HA-105, coast defense vessel CDV No. 19, coast defense vessel CDV No. 106, passenger liner Kotobuki Maru, cargo army mine Yumihara No. 3, merchant cargo ship EIAN Maru, cargo ship Kotobuki Maru No. 7, ship Niigato Maru, auxiliary transport Ono Maru No. 14, special submarine chaser SP SC No. 230, coast defense vessel CDV No. 104, ship Nanshima Maru, defense ship Daito Maru, coast defense vessel CDV No. 154, hospital ship Hikawa Maru, ship Tare Maru No. 17, ship Kusen Maru No. 44, ship Yasaka Maru No. 5, submarine I-351, auxiliary minesweeper Choun Maru No. 6, ship Kunshin Maru No. 1, submarine chaser SC No. 57, fishing boat Banshu Maru No. 3, cargo ship Enoshima Maru, auxiliary submarine chaser Shonan Maru No. 2, transport ship Sugi Maru, cargo ship Nippo Maru, destroyer Hinoki Maru, torpedo boat Kiji. Significant events visible on the map include the Shoonan Maru No. 2 sighting a torpedo, Commander Fleet Air Wing 4 hitting shipping and ships in the Shimonoseki straits being hit.