United States, Hydrographic Office. From the latest information to 1923. Coordinates approximate and based on Greenwich meridian. Depths shown by soundings; relief by form lines. 1940... U.S. Navy Hydrographic Office,.
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United States, Hydrographic Office. From the latest information to 1923. Depths shown by soundings. 1935 variation compasses. Shows low water areas. References larger scale charts. No... U.S. Navy Hydrographic Office,.
United States, Hydrographic Office. From British and United States surveys to 1882 ; published June, 1883 at the Hydrographic Office under the authority of the Secretary of the Navy. ... U.S. Navy Hydrographic Office,.