You are here: EIS/OEIS > Proposed Action and Alternatives

The Navy’s Proposed Action is to continue to conduct training and testing activities, which may include the use of active sonar and explosives, primarily in established operating and military warning areas of the Mariana Islands Training and Testing (MITT) Study Area. Many of the training and testing activities addressed in the EIS/OEIS were previously analyzed and authorized under separate environmental documents. The Proposed Action also includes pierside sonar maintenance and testing alongside Navy piers located in Inner Apra Harbor, and land-based training activities at existing military ranges on Guam and the Commonwealth of the Northern Mariana Islands (CNMI).

Mariana Islands Training and Testing Study Area Map

The purpose of the Proposed Action is to achieve and maintain military readiness to meet the requirements of Title 10 of the U.S. Code, thereby ensuring that the Navy and other Services meet their mission to maintain, train, and equip combat-ready military forces capable of winning wars, deterring aggression, and maintaining freedom of the seas. This mission is achieved in part by training and testing within the MITT Study Area.

Three alternatives were analyzed in the Mariana Islands Training and Testing Final EIS/OEIS.

No Action Alternative:
  • Continues training and testing activities, as well as air and sea space reconfigurations, as defined in completed environmental planning documents.
  • Serves as a baseline for which to compare the potential effects of Alternatives 1 and 2.

Alternative 1:
  • Includes the No Action Alternative, plus adjustments to Study Area boundaries for analysis purposes, and adjustments to the types and levels of training and testing activities to support current and planned military requirements.
  • Consists of activities and requirements associated with the development, testing, and introduction of new vessels, aircraft, and weapons systems into the fleet.
  • Includes the establishment of danger zones for existing shore-based small arms and explosive ordnance disposal ranges and a new small-arms firing range.

Alternative 2:
  • Includes all activities under Alternative 1, plus additional adjustments to the types and levels of training and testing activities.