The U.S. Department of the Navy is seeking proposals for the development of second order acoustic vector sensors to enhance the performance of sonobuoys used in air Anti-Submarine Warfare (ASW) operations. The objective is to create advanced sensor configurations that improve tracking and localization of stealthier targets, thereby increasing the effectiveness of naval operations. These sensors are crucial for achieving higher directivity and array gain in complex acoustic environments, which is essential for modern ASW missions. Interested parties should note that the solicitation is set to open on April 23, 2025, with a closing date of May 21, 2025, and must ensure compliance with security requirements for classified work. Further details can be found on the official SBIR website.