This Broad Agency Announcement (BAA) from the Naval Sea Systems Command (NAVSEA) solicits proposals for applied biomedical research and diving equipment development focused on diver health, safety, and performance, as well as submariner survivability. The BAA will remain open for a two-year period from its publication date. Typical projects are expected to last two years or less, and historically, awarded contracts have averaged around $300,000 or less in cost annually. The primary areas of interest are divided into Diving (encompassing breathing gas, human performance, environmental protection, decompression, and tools/transportation/training) and Submarine Escape and Rescue. Proposals are evaluated through a two-step pre-proposal and full proposal process.