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I.M. Systems Group
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Oceans
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Massachusetts
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Point
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1. Aids to Navigation, Northeast United States, 2012
2012. I.M. Systems Group. This point shapefile represents marine aids to navigation in the Northeastern United States. The Coast Guard maintains systems of marine aids to na... Coastal Services Center (U.S.).
2. Unexploded Ordnance Locations, Northeast United States, 2012
2012. I.M. Systems Group. Unexploded ordnance (or UXOs/UXBs, sometimes identified as UO) are explosive weapons (bombs, bullets, shells, grenades, land mines, naval mines, et... Coastal Services Center (U.S.).