A WWII U.S. Army Air Forces silk escape map covering the Sea of Japan and the coasts of Hokkaido and Honshu, overlaid with ocean current data to aid downed aircrew. Issued as survival equipment to bomber crews such as those of the 345th Bomber Group operating from Ie Shima, these lightweight, durable cloth maps could be concealed and used to navigate to safety behind enemy lines. Project: 218277