Plans in the North Part of Tusima

Navigable harbors on the north side of Tsushima Island.

This collage of harbor plans on the northern part of Japan’s Tsushima Island was published in March 1945 by the United States Navy Hydrographic Office. Base maps taken from early 20th-century Japanese surveys were reproduced and updated with additional information as it became available. Five different charts note depth soundings, lines of magnetic delineation, currents, and coastal features. Topography is shown in contour.

The sheet, marked Restricted, has a rubberstamp in the left margin indicating it “contains information affecting the national defense of the United States” and should be destroyed by burning when superseded or rescinded.