This is a Sources Sought notice for planning purposes to identify qualified sources capable of providing Undersea Warfare analytical test and evaluation support services. The Government is seeking capability statements from interested contractors, with a particular focus on determining if sufficient small business interest exists for a potential set-aside. Responses must include detailed company information, a capability statement with relevant past performance, and specific details on how a small business prime would comply with subcontracting limitations. The anticipated NAICS code is 541330 (Engineering Services) with a $25.5 million size standard. This is not a solicitation, and no contract will be awarded from this announcement.