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It shows 30 Groups of mines (the triangular symbols at the ends of the connecting cables), nominally of 19 mines per group, controlled (variously) from Ft. Dawes on Deer Island, Ft. Warren on
Georges Island, and from Great Brewster Island. The map also indicates the boom and netting barriers that
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This map of the controlled mine fields protecting Boston Harbor in 1945 comes from the report "Supplement to the Harbor
Defense Project: Harbor Defenses of Boston," U.S. Army Engineers, 31 January, 1945. It shows 30 Groups of mines, nominally of 19
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This map of the controlled mine fields protecting Boston Harbor in 1945 comes from the report "Supplement to the Harbor
Defense Project: Harbor Defenses of Boston," U.S. Army Engineers, 31 January, 1945.
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guarded the inner harbor by closing the channel between Long Island and Deer Island, the gap between Long Island and Moon Island, and the channels on either end of
Peddocks Island.
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This image is an enlargement of a portion of the original map, which has been sharpened and had an approximate scale (in red) added for use on
Knowledge.
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soldier or employee, taken or made as part of that person's official duties. As a
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Add a one-line explanation of what this file represents
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Commons is a freely licensed media file repository.
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work of the federal government of the United States
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741:Submarine mines in United States harbor defense
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128:Description
731:Fort Dawes
717:File usage
698:892 × 632
674:Dimensions
475:image/jpeg
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
