2013. I.M. Systems Group. This polygon shapefile represents maintained navigation channels in the North Atlantic United States. The condition of navigation channels is repor... United States. National Oceanic and Atmospheric Administration.
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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... United States. National Oceanic and Atmospheric Administration and Coastal Services Center (U.S.).
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.).
2012. I.M. Systems Group. This polygon shapefile represents the geographic location and identity of designated areas used to manage vessel traffic in the northeast United St... United States. National Oceanic and Atmospheric Administration.
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.).
2012. I.M. Systems Group. The term disposal site means a finally approved and precise geographical area within which ocean dumping of wastes is permitted under conditions sp... Coastal Services Center (U.S.).