SSP is interested in receiving proposals for Long-Range S&T Projects that offer potential in support of the Undersea Security Program. Readers should note that this is an announcement to declare SSP's broad role in competitive funding of meritorious research across a spectrum of science and engineering disciplines. This announcement is the second annual refresh of N00030-23-S-7002. The first annual refresh of N00030-23-S-7002 was N00030-24-S-7002. Attached and updated BAA is numbered N00030-25-S-7002. All changes to the BAA and associated appendices are in red font.