69013 Data Set Published / External 37232 MarineCadastre Project Completed 2025-06-30 Munitions and explosives of concern (MEC) have been deposited on the seabed of the United States outer continental shelf since World War I. The bulk of these munitions have originated from the U.S. Armed Forces while conducting military training exercises, war-time placement, and disposal and dumping activities. Since 1972 ocean disposal of munitions and other pollutants has been banned by the Marine Protection, Research, and Sanctuaries Act. Federal and state efforts to mitigate, map, monitor, and sometimes remove these munitions are ongoing. The location of these munitions is generally unknown, and their existence remains a hazard to people and the natural resources within this geography. The term MEC defines a collection of munitions including; a) unexploded ordnance, b) discarded military munitions, and c) munitions constituents that are present in high enough concentrations to pose an explosive hazard. Additional information on the location of MECs can be found in the data and references listed below: 1. Formerly Used Defense Sites 2. Danger Zones and Restricted Areas 3. U.S. Disposal of Chemical Weapons in the Ocean: Background and Issues for Congress, CRS Report for Congress, January 3, 2007 4. Defense Environmental Programs Annual Report to Congress for Fiscal Year 2009. Chapter 10. Sea Disposal of Military Munitions To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act. The shape and position of each feature originates from the highest resolution and latest available source data. Using these data with other raster or vector nautical chart products may result in the appearance of offsets and discontinuities between these data and the other sources. Bureau Code: 006:48, Program Code: 006:055 Theme ISO 19115 Topic Category oceans Theme coastal Theme planning Spatial American Samoa Spatial Exclusive Economic Zone Spatial Guam Spatial Northern Mariana Islands Spatial Outer Continental Shelf Spatial Puerto Rico Spatial Territorial Sea Spatial US Virgin Islands Spatial United States of America Charleston SC Data Set None Planned Map (digital) description, reportYear, chartReference, district, UTM https://www.marinecadastre.gov/about/disclaimer.html NOAA Office for Coastal Management Point of Contact 2022-08 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Publication Date -177.25 177.75 71.5 13.25 Discrete 2023 publication date No Yes No No No Geometry Only Yes Geographic 2D EPSG:4269 NAD83 North American Datum 1983 GRS 1980 6378137 298.257222101 1 Geodetic Latitude Lat degree north 1 Geodetic Latitude Lat degree north 2 Geodetic Longitude Lon degree east 2 Geodetic Longitude Lon degree east Unclassified For coastal and ocean planning https://marinecadastre.gov/data/ Marine Cadastre Data Registry https://marinecadastre.gov/downloads/data/mc/MunitionsExplosivesConcern.zip Microsoft Windows, ArcGIS Pro, Azure SQL Untested Compiled to meet 10 meters horizontal accuracy at 95% confidence level Untested These data are logically consistent ENC Direct to GIS Organization NOAA Office of Coast Survey Originator 2024-02-27 https://encdirect.noaa.gov/ Local Notice to Mariners Organization U.S. Coast Guard Navigation Center Originator 2025-01-14 https://www.navcen.uscg.gov/sites/default/files/pdf/lnms/LNM01112025.pdf Location and identity of feature(s) Local Notice to Mariners 27/24 Organization U.S. Coast Guard Navigation Center Originator 2024-07-02 https://www.navcen.uscg.gov/local-notices-to-mariners-by-cg-district Location and identity of feature(s) Local Notice to Mariners 42/24 Organization U.S. Coast Guard Navigation Center Originator 2024-10-15 https://www.navcen.uscg.gov/sites/default/files/pdf/lnms/lnm05422024.pdf Location and identity of feature(s) Maritime Chart Service Organization NOAA Office of Coast Survey Originator https://gis.charttools.noaa.gov/arcgis/rest/services/MCS/NOAAChartDisplay/MapServer/exts/MaritimeChartService/MapServer Raster Navigational Charts Organization NOAA Office of Coast Survey Originator 2022-12-22 https://www.charts.noaa.gov/RNCs/RNCs.shtml U.S. Code of Federal Regulations Organization U.S. Army Corps of Engineers Publisher 2022-07-01 https://www.ecfr.gov/current/title-33/chapter-II/part-334 Provided coordinates of features and related language necessary to build feature geometry | Type of Source Media: online 1 1. Acquire source data by URL 2. Imported ENC area and point layers for Dumping Ground, and Caution features for bands a) coastal, b) approach, and c) harbor scale 3. Removed duplicate features 4. Removed features not clearly identified as unexploded ordnance 5. Removed features beyond the U.S. Exclusive Economic Zone 6. Removed features if they matched content currently in the Danger Zones and Restricted Areas data set 7. Validated completeness by visual comparison to current NOAA Raster Navigational Charts, Marine Cadastre map services Unexploded Ordnance Areas, Unexploded Ordnance Locations, Formerly Used Defense Sites, and NOAA ENC map services 8. Added new features listed in the Local Notice to Mariners 9. Adjusted the location, size and shape of each feature to align with the highest resolution NOAA Raster Navigational Chart available for each location using the local UTM projection 10. Populated the comment field using the textual description for each feature shown on the RNC 11. Added the values for the U.S. Coast Guard district and the UTM zone for each feature 12. Removed duplicate, extraneous and relic ENC vertex values that did not contribute to defining the shape of a feature 13. Executed the ArcGIS Pro function DENSIFY with a four-meter setting on all newly positioned circular features 14. Executed the ArcGIS Pro functions PROJECT and MERGE to combine features across all UTM Zones 15. Executed and passed the ArcGIS Pro function CHECK GEOMETRY with the OGC parameter 16. Executed and passed the QGIS function VECTOR > GEOMETRY TOOLS > CHECK VALIDITY with all GEOS parameters set to on 17. Visually inspected each feature for accuracy and completeness based on the associated RNC 2023-01-11T00:00:00 2 1. Acquire and query features from the Danger Zones and Restricted Areas data set that depict MEC features 2. Modify the Danger Zones and Restricted Areas record set to match the existing Munitions and Explosives of Concern data structure 3. APPEND the Danger Zones and Restricted Areas record set to the existing Munitions and Explosives of Concern data set 2023-03-08T00:00:00 3 1. Add newly discovered feature east of New York city 2. Fix several omissions in the following areas, Guam, Mariana Islands, Thunder Bay Michigan, North Carolina, Key West Florida, and Lake Borgne Louisiana 2024-02-28T00:00:00 4 Added 2 newly discovered features 25 nm east of Sandy Hook 2024-07-09T00:00:00 5 1. Added newly discovered features offshore of California, Virginia and Massachusetts 2025-06-30T00:00:00 gov.noaa.nmfs.inport:69013 Daniel Martin 2023-01-03T21:43:45 Daniel Martin 2025-06-30T15:44:37 2023-01-12 Office for Coastal Management OCM 1002 Public No No 2018-07-25 1 Year 2019-07-25