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Digital Maritime Zones and National Baseline on NOAA’s Nautical Charts Meredith Westington NOAA’s Office of Coast Survey Contiguous Zone (shown at 12nm.

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Presentation on theme: "Digital Maritime Zones and National Baseline on NOAA’s Nautical Charts Meredith Westington NOAA’s Office of Coast Survey Contiguous Zone (shown at 12nm."— Presentation transcript:

1 Digital Maritime Zones and National Baseline on NOAA’s Nautical Charts Meredith Westington NOAA’s Office of Coast Survey Contiguous Zone (shown at 12nm prior to 1999) Exclusive Economic Zone Three Nautical Mile Line Territorial Sea Snapshot of chart 18740, 40 th edition

2 Territorial Sea Snapshot of chart 18740, 40 th edition Area of sovereignty Area of sovereignty Innocent passage Innocent passage Outer extent moved from 3 to 12 nautical miles through Presidential Proclamation in 1988 Outer extent moved from 3 to 12 nautical miles through Presidential Proclamation in 1988

3 Contiguous Zone (shown at 12nm prior to 1999) Snapshot of chart 18740, 40 th edition Zone is contiguous to the territorial sea Zone is contiguous to the territorial sea Coastal state can exercise control necessary to protect infringement of the following regulations: Coastal state can exercise control necessary to protect infringement of the following regulations: CustomsCustoms FiscalFiscal ImmigrationImmigration SanitarySanitary Outer extent moved from 12 to 24 nautical miles through Presidential Proclamation in 1999 Outer extent moved from 12 to 24 nautical miles through Presidential Proclamation in 1999

4 Exclusive Economic Zone EEZ (maritime boundary with Mexico) Snapshot of chart 18740, 40 th edition Zone is contiguous to the territorial sea Zone is contiguous to the territorial sea Outer limit cannot exceed 200 nautical miles from the baseline from which the territorial sea is measured Outer limit cannot exceed 200 nautical miles from the baseline from which the territorial sea is measured Sovereign rights and jurisdiction over EEZ resources and activities Sovereign rights and jurisdiction over EEZ resources and activities Respect rights of navigation and over flight consistent with international law Respect rights of navigation and over flight consistent with international law EEZ declared through Presidential Proclamation in 1983 EEZ declared through Presidential Proclamation in 1983

5 Three Nautical Mile Line Snapshot of chart 18740, 40 th edition Outer limit of the territorial sea prior to 1988 Presidential Proclamation Outer limit of the territorial sea prior to 1988 Presidential Proclamation Ambulatory line projected 3 nautical miles from the baseline from which the territorial sea is measured Ambulatory line projected 3 nautical miles from the baseline from which the territorial sea is measured Not necessarily the same as the Submerged Lands Act federal/state boundary Not necessarily the same as the Submerged Lands Act federal/state boundary Used for federal fisheries, water quality, and other laws or regulations Used for federal fisheries, water quality, and other laws or regulations May be used by U.S. states to regulate laws May be used by U.S. states to regulate laws

6 Law of the Sea Guidelines for delimiting the maritime zones Guidelines for delimiting the maritime zones Articles set forth criteria for determining the “baseline” Articles set forth criteria for determining the “baseline”

7 Normal Baseline Low-water line along the coast as marked on large-scale, officially recognized charts. Contributing Baseline Points

8 Created: August 7, 1970 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. Coastline Purpose: To provide an interagency forum to discuss and make determinations on all questions relating to the official delimitation of the U.S. Coastline Chaired by the Department of State with representatives from Chaired by the Department of State with representatives from Department of Commerce (NOAA)Department of Commerce (NOAA) Department of JusticeDepartment of Justice Department of Interior (MMS, FWS)Department of Interior (MMS, FWS) Department of Homeland Security (USCG)Department of Homeland Security (USCG) Department of NavyDepartment of Navy Department of Defense (NGA)Department of Defense (NGA) Environmental Protection Agency (EPA)Environmental Protection Agency (EPA) Federal Communications CommissionFederal Communications Commission U.S. Baseline Committee

9 Evaluating the Baseline Low-tide elevations- naturally formed Low-tide elevations- naturally formed features must be dry at low tide (Article 13) Permanent harborworks- Permanent harborworks- features must form an integral part of the harbor system (no artificial islands- Article 11) Bay closing lines- 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 Baseline vs Coastline 3nm Line drawn from baseline with jetty 3nm Line without 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) To retrieve the contributing baseline points and limit line (ex. Gardner Pinnacles, NWHI) Vector LWL Contributing Baseline Points Vector LWL Contributing Baseline Points THREE NAUTICAL MILE LIMIT

12 Updates to Paper/Raster Nautical Charts THEN- THEN- Territorial Sea and Contiguous Zone are both projected 12 nautical miles from baseline NOW- NOW- Territorial Sea at 12 nautical miles and Contiguous Zone at 24 nautical miles from baseline

13 Availability on the Web EEZ is Available Now! NEW Maritime Limits Website! Available in shp and dbf formats Created from CARIS software and provided in shapefile format Credit: FWC

14 ENC equivalent to chart (Louisiana) ENC equivalent to chart NOAA Electronic Navigational Charts 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 areas Created in dKart’s dkLook (free chart viewer)

15 Two Methods of downloading ENCs for Navigation ENCs: Free Internet Download

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 Florida ENC Symbology for “Territorial Sea Area” – black dashed line ENC Symbology for COLREGS demarcation line – magenta dashed line

18 Summary ENC downloads Exclusive Economic Zone Maritime Limits


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