The contract requires retrieving 37 underwater hydrophones and mooring assemblies from three Puget Sound locations (Admiralty Inlet, Central Puget Sound, and Tacoma Narrows), then rigging and deploying 27 new receivers, with optional yearly maintenance for four additional years. Performance will occur at NWFSC, 7305 Beach Drive E, Port Orchard, WA 98336, with a base period of October 1, 2026, through September 30, 2027, and option years extending through September 30, 2031. This acquisition is set aside for small businesses under NAICS 488330 with a $47 million size standard, and the government anticipates a firm-fixed-price contract. Evaluation will weigh vessel capability and technical approach, prior experience, and price, with non-price factors considered more important than price. Offerors must provide itemized per-unit pricing and a lump-sum installation amount for the base year and all option years.