Navy proposes testing activities at Marianas study area

The U.S. Navy is proposing to conduct at-sea training and testing activities that would include the use of active sonar and explosives within the study area in Guam and the CNMI.

The testing activities, according to the Navy, is aims to maintain a ready force “to ensure the military can accomplish its mission to maintain, train, and equip combat-ready forces.”

The U.S. Navy has prepared a draft supplement to the 2015 Final Mariana Islands Training and Testing (MITT) Environmental Impact Statement/Overseas Environmental Impact Statement (EIS/OEIS), which evaluates the potential environmental impacts associated with conducting ongoing and future military readiness activities within the study area at sea and on Farallon de Medinilla.

The Navy said the proposed at-sea training and testing activities are generally consistent with those analyzed in the 2015 MITT Final EIS/OEIS and are similar to activities the military has conducted in the study area for decades. The MITT study area includes: the Mariana Islands Range Complex, areas on the high seas to the north and west of the Mariana Islands Range Complex, a transit corridor between the Mariana Islands Range Complex and the Hawaii Range Complex, starting at the international date line, and Apra Harbor and select Navy pierside and harbor locations. The Navy is seeking public review and comment on the proposed action and alternatives and the accuracy and adequacy of the environmental analysis. The Draft Supplemental EIS/OEIS is available for public review online at and at the following locations: Guam: Robert F. Kennedy Memorial Library

University of Guam

Apra Harbor