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Autonomous passive acoustic recorders have been used for the past 15 years to monitor the coastal occurrence of Southern Resident killer whales (SRKW), other marine mammals, and anthropogenic noise in and adjacent to the Navy’s NWRTC in Washington State. The five autonomous acoustic recorders in and adjacent to the Navy’s NWTRC were successfully recovered in early September 2021 and new moorings were redeployed at each site.