Presentation on theme: "Digital Maritime Zones and National Baseline on NOAA’s Nautical Charts"— Presentation transcript:
1 Digital Maritime Zones and National Baseline on NOAA’s Nautical Charts Meredith WestingtonNOAA’s Office of Coast SurveyExclusive Economic ZoneThree Nautical Mile LineTerritorial SeaSnapshot of chart 18740, 40th editionContiguous Zone(shown at 12nm prior to 1999)
2 Territorial Sea Area of sovereignty Innocent passage Outer extent moved from 3 to 12 nautical miles through Presidential Proclamation in 1988Territorial SeaSnapshot of chart 18740, 40th edition
3 Contiguous Zone Zone is contiguous to the territorial sea Coastal state can exercise control necessary to protect infringement of the following regulations:CustomsFiscalImmigrationSanitaryOuter extent moved from 12 to 24 nautical miles through Presidential Proclamation in 1999Contiguous Zone(shown at 12nm prior to 1999)Snapshot of chart 18740, 40th edition
4 Exclusive Economic Zone Zone is contiguous to the territorial seaOuter limit cannot exceed 200 nautical miles from the baseline from which the territorial sea is measuredSovereign rights and jurisdiction over EEZ resources and activitiesRespect rights of navigation and over flight consistent with international lawEEZ declared through Presidential Proclamation in 1983EEZ(maritime boundary with Mexico)Snapshot of chart 18740, 40th edition
5 Three Nautical Mile Line Outer limit of the territorial sea prior to 1988 Presidential ProclamationAmbulatory line projected 3 nautical miles from the baseline from which the territorial sea is measuredNot necessarily the same as the Submerged Lands Act federal/state boundaryUsed for federal fisheries, water quality, and other laws or regulationsMay be used by U.S. states to regulate lawsThree Nautical Mile LineSnapshot of chart 18740, 40th edition
6 Law of the Sea Guidelines for delimiting the maritime zones Articles set forth criteria for determining the “baseline”
7 Normal BaselineContributing Baseline PointsLow-water line along the coast as marked on large-scale, officially recognized charts.
8 U.S. Baseline Committee Created: August 7, 1970 Purpose: To provide an interagency forum to discuss and make determinations on all questions relating to the official delimitation of the U.S. CoastlineChaired by the Department of State with representatives fromDepartment of Commerce (NOAA)Department of JusticeDepartment of Interior (MMS, FWS)Department of Homeland Security (USCG)Department of NavyDepartment of Defense (NGA)Environmental Protection Agency (EPA)Federal Communications Commission
9 Evaluating the Baseline Low-tide elevations- naturally formed features must be dry at low tide (Article 13)Permanent harborworks- features must form an integral part of the harbor system (no artificial islands- Article 11)Bay closing lines- well-marked indentations of the land that meet several tests can be closed with a straight line (normal baseline only- Article 10)
10 3nm Line drawn from baseline with jetty Baseline vs Coastline3nm Linewithout jetty3nm Line drawn from baseline with jetty
11 Caris’ Law of the Sea: Limits & Boundaries Envelope of Arcs To retrieve the contributing baseline points and limit line (ex. Gardner Pinnacles, NWHI)Vector LWLContributing Baseline PointsTHREE NAUTICALMILE LIMIT
12 Updates to Paper/Raster Nautical Charts THEN- Territorial Sea and Contiguous Zone are both projected 12 nautical miles from baselineNOW- Territorial Sea at 12 nautical miles and Contiguous Zone at 24 nautical miles from baseline
13 Availability on the Web EEZ is Available Now!Available in shp and dbf formatsCredit: FWCCreated from CARIS software and provided in shapefile formatNEW Maritime Limits Website!
14 NOAA Electronic Navigational Charts ENC equivalent to chart (Louisiana)The area covered by an NOAA ENC is referred to as a "cell." At present, each NOAA ENC cell corresponds to the largest scale paper chart in a given area. As the NOAA ENC begins to contain more detail and the file sizes get larger, it may become necessary to split the cells into smaller areasENC equivalent to chart 11353Created in dKart’s dkLook (free chart viewer)
15 Two Methods of downloading ENCs for Navigation ENCs: Free Internet DownloadTwo Methods of downloading ENCs for Navigation
16 Territorial Sea in ENCs: Depiction of Zone at West Coast of Florida
17 Territorial Sea in ENCs: Depiction of Inner Limit at West Coast of FloridaENC Symbology for COLREGS demarcation line – magenta dashed lineENC Symbology for “Territorial Sea Area” – black dashed line
18 Exclusive Economic Zone SummaryENC downloadsExclusive Economic ZoneMaritime Limits
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