The Naval Sea Systems Command plans to modify an existing contract with Leidos Holdings, Inc. to procure additional Low-Rate Initial Production units of the Acoustic Device Countermeasure MK 5, along with engineering support. This action is necessary to meet critical fleet deployment and testing schedules, as Leidos is the original developer and the government lacks a complete Technical Data Package. No budget amount is specified. The work location is not explicitly stated, but the contract is managed by NAVSEA. Interested parties may submit a capability statement for consideration, with responses due via email to specified contacts.