The comment period is underway through Oct. 19, 2026!

Subscribe to receive updates and announcements.

Participate in the in-person and virtual public meetings!

View a virtual presentation to learn more about the project.

Project Overview Fact Sheet

This is an image of the cover of the Northwest Training and Testing Supplemental Environmental Impact Statement/Overseas Environmental Impact Statement project fact sheet booklet.

Notice of Availability/Notice of Public Meetings

This is an image of the Notice of Availability and Notice of Public Meetings for the Northwest Training and Testing Draft Supplemental Environmental Impact Statement/Overseas Environmental Impact Statement.

Training and Testing with Sonar and Explosives

At-sea military readiness activities may include the use of active sonar, explosives, and other sources of sound.

Use of Active Sonar

  • Most effective method of detecting, identifying, and tracking underwater threats, including quiet submarines and in-water mines.
  • Proficiency is complex and requires regular, hands-on training in realistic and diverse conditions.
  • Simulators cannot completely replace training and testing in a realistic environment.
  • Weapon systems, aircraft, and vessels are tested in the way they would be used in a real-world situation.
This is an image of a sonar technician.

 

Use of Explosives (Live Ordnance)

  • Service members are prepared to respond to emergencies and national security threats.
  • Significantly enhances the safety of U.S. forces in combat.
  • Improvement in the readiness of service members and reliability of equipment.
This is an image of an at-sea live fire exercise.