LIBRARY OF CONGRESS, GEOGRAPHY AND MAP DIVISION / SCIENCE PHOTO LIBRARY LIBRARY OF CONGRESS, GEOGRAPHY AND MAP DIVISION / SCIENCE PHOTO LIBRARY
European naval restrictions, World War I. Map of Western Europe and the western Mediterranean Sea, showing the restrictions on shipping ('freedom of the seas') in 1915 during the First World War. The map shows shipping lanes to be used by neutrals and American ships (the USA entered the war in 1917) to avoid German naval mines and submarines. The hashed areas along Western European coastlines are where submarine mines were distributed. Also marked is a route for US ships sailing to Falmouth, and a safe shipping lane in the western Mediterranean for neutral shipping. The western Mediterranean is divided into a safe zone and a danger zone.
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