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 completed a Final Supplemental Environmental Impact Statement/Overseas Environmental Impact Statement (EIS/OEIS)  for Navy training activities in the Gulf of Alaska (GOA) to update previous environmental impact analyses with new information and analytical methods the Navy developed and has used since 2016. New information includes an updated acoustic effects model, updated marine mammal density data and sea turtle hearing criteria, and other emergent best available science.

The Navy prepared a Supplemental EIS/OEIS to renew required federal regulatory permits and authorizations under the Marine Mammal Protection Act and the Endangered Species Act. The Final Supplemental EIS/OEIS includes the analysis of at-sea training activities projected to meet readiness requirements beyond 2022 and into the reasonably foreseeable future, and reflects the most up-to-date compilation of training activities deemed necessary to accomplish military readiness. These activities were previously analyzed in 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 Navy would continue to implement mitigation measures to avoid or reduce potential impacts on marine species and the environment from training activities, including the implementation of a new mitigation area within the continental shelf and slope of the Temporary Maritime Activities Area.