Welcome to the U.S. Navy's website for the Gulf of Alaska Navy Training Activities Supplemental Environmental Impact Statement/Overseas Environmental Impact Statement (EIS/OEIS).

The Navy has prepared a draft supplement to the 2011 Gulf of Alaska Navy Training Activities Final EIS/OEIS and the 2016 Gulf of Alaska Navy Training Activities Final Supplemental EIS/OEIS. The 2020 Draft Supplemental EIS/OEIS was available for public review and comment from Dec. 11, 2020, through Feb. 16, 2021.

The Navy’s Proposed Action is to continue periodic military training activities within the Gulf of Alaska Study Area. Proposed training activities are similar to those that have occurred in the Study Area for decades. The Navy would continue to implement mitigation measures to avoid or reduce potential impacts on marine species and the environment from training activities.

The purpose of this Supplemental EIS/OEIS is to update the 2011 and 2016 impact analyses with new information and analytical methods. New information includes an updated acoustic effects model, updated marine species density data and hearing criteria, and other emergent best available science.

The Navy is preparing a Supplemental EIS/OEIS to renew required federal regulatory permits and authorizations under the Marine Mammal Protection Act and the Endangered Species Act. Current federal regulatory permits and authorizations expire in April 2022.