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The Navy has been preparing environmental planning documents to assist with environmental compliance through a comprehensive approach that was first instituted by the Navy’s “At Sea Policy” guidance in 2000. The Navy has completed Phases I through III, in addition to other previously completed analyses, such as the 2022 Point Mugu Sea Range EIS.

With the upcoming Phase IV analysis, the Navy will seek the issuance of regulatory permits and authorizations under the Marine Mammal Protection Act and Endangered Species Act to support the continuation of at-sea military readiness activities starting in 2025 for the reasonably foreseeable future. 

This Phase IV EIS will include an analysis of military readiness activities using new information including best available science, an updated acoustic effects analysis, and updated marine mammal density data.

Previous Environmental Analyses

Phase I

Phase II

Phase III

  • Preparation of individual or separate environmental planning documents for:
    • Hawaii Range Complex EIS/OEIS (2008)
    • Southern California Range Complex EIS/OEIS (2008)
    • Silver Strand Range Complex EIS (2012)
  • Analysis of at-sea training and testing covered under previous documents combined and additional areas, such as pier-side locations and a transit corridor, included.
  • Completed December 2013
  • Re-evaluation of ongoing at-sea training and testing in existing ranges and operating areas including activities during transit between these areas. 
  • Completed December 2018
The Navy's environmental planning documents for completed projects are found at the homepage.

Previous analyses were also completed in 2002 and 2022 for the Point Mugu Sea Range EIS/OEISs; those activities did not include use of sonar or in-water explosives.