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Fact Sheet

Project Overview

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Draft SEIS/OEIS

Notice of Availability

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Fact Sheet - CHamoru (Guam)

Project Overview

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Fact Sheet - Chamorro (CNMI)

Project Overview

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Fact Sheet - Carolinian

Project Overview

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U.S. Marine Corps: This is an image of the United States Marine Corps logo.
Department of the Air Force: This is an image of the United States Department of the Air Force logo.
Department of the Army: This is an image of the United States Department of the Army logo.
U.S. Coast Guard: This is an image of the United States Coast Guard logo.

Documents

Mariana Islands Training and Testing Draft Supplemental EIS/OEIS (March 2026)

Full Document

By Section

This is an image of the cover of the Mariana Islands Training and Testing Draft Environmental Impact Statement/Overseas Environmental Impact Statement.

Technical Reports

Quantifying Acoustic Impacts on Marine Mammals and Sea Turtles: Methods and Analytical Approach for Phase IV Training and Testing (September 2024) Technical Report.Quantifying Acoustic Impacts on Marine Mammals and Sea Turtles: Methods and Analytical Approach for Phase IV Training and Testing (September 2024)
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This is an image of the first page of the Biological Resources Background Information Technical Report. Biological Resources Background Information (March 2026)
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This is an image of the first page of the Acoustic and Explosive Effects Analysis for Marine Mammals, Sea Turtles, and Fishes in the Mariana Islands Training and Testing Study Area (Phase IV) Technical Report. Acoustic and Explosive Effects Analysis for Marine Mammals, Sea Turtles, and Fishes in the Mariana Islands Training and Testing Study Area (Phase IV) (February 2026)
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This is an image of the first page of the Acoustic Concepts and Summary of Best Available Science to Support Assessing Effects on Fishes, Marine Mammals, and Reptiles due to Acoustic and Explosive Stressors Technical Report. Acoustic Concepts and Summary of Best Available Science to Support Assessing Effects on Fishes, Marine Mammals, and Reptiles due to Acoustic and Explosive Stressors (February 2026)
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This is an image of the first page of the Acoustic and Explosive Effects Analysis for Marine Mammals, Sea Turtles, and Fishes in the Mariana Islands Training and Testing Study Area (Phase IV) Technical Report. Criteria and Thresholds for U.S. Navy Acoustic and Explosive Effects Analysis (Phase 4) Revision 2025.2 (November 2025)
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This is an image of the first page of the U.S. Navy Marine Species Density Database Phase IV for the Mariana Islands Training and Testing Study Area Technical Report. U.S. Navy Marine Species Density Database Phase IV for the Mariana Islands Training and Testing Study Area (September 2024)
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Regulatory Documents

  • Current Letter of Authorization for Navy training and testing activities conducted in the U.S. Navy’s Mariana Islands Training and Testing (MITT) Study Area (July 2020)

Information Repositories

The Action Proponents distributed the Draft SEIS/OEIS to federal and local government agencies with which they are consulting and other stakeholders. The Draft SEIS/OEIS is available for public review and download; printed copies are available for viewing at:

  • Robert F. Kennedy Memorial Library, University of Guam, UOG Station, Mangilao, GU 96923
  • Nieves M. Flores Memorial Library, 254 Martyr St., Hagåtña, GU 96910
  • Joeten-Kiyu Public Library, Insatto St. and Beach Road, Saipan, MP 96950
  • Tinian Public Library, San Jose Village, Tinian, MP 96952
  • Antonio C. Atalig Memorial Library (Rota Public Library), Rota, MP 96951