**Hudson and East Rivers 1941** This nautical chart documents the confluence of Manhattan's two major waterways, surveyed by the U.S. Coast and Geodetic Survey during the height of World War II maritime activity. The chart captures the complex bathymetry and shipping channels that made New York Harbor one of the world's busiest wartime ports. Printed on heavy cotton-fiber paper with precise copper-plate engraving typical of official government maritime publications.