the U.S. Coast Guard Cutter Healy and the Canadian Coast Guard Cutter Louis S Saint Laurent operating in Arctic sea ice, as seen from the ice level

U.S. Extended Continental Shelf Project

The extended continental shelf is that portion of the continental shelf beyond 200 nautical miles from shore.

The Ocean

Key Takeaways:

  • The ECS is that portion of the continental shelf beyond 200 nautical miles from shore. The U.S. ECS is an important maritime zone that holds many resources and vital habitats for marine life.
  • Knowledge of the exact extent of the U.S. ECS and an improved understanding of its resources will promote economic prosperity and enhance stewardship of our natural resources.
  • Since 2003, U.S. agencies have been engaged in gathering and analyzing data to determine the outer limits of the U.S. ECS.

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