This is the transcript of the unclassified portion of a hearing before two subcommittees of the U.S. House of Representatives. It includes testimony and prepared statements from the Deputy Director of the Defense Advanced Research Projects Agency and the Deputy Chief of Naval Operations of the U.S. Navy. Advances in submarine quieting threaten the anti-submarine warfare advantage. These quiet submarines pose a serious threat to the sea lanes of communication, and potentially a submarine-launched cruise missile threat.

The submarine was undoubtedly the most potent purely naval weapon of the twentieth century. In two world wars, enemy underwater campaigns were very nearly successful in thwarting Allied hopes of victory - indeed, annihilation of Japanese shipping by US Navy submarines is an indicator of what might have been. That the submarine was usually defeated is a hugely important story in naval history, yet this is the first book to treat the subject as a whole in a readable and accessible manner. It concerns individual heroism and devotion to duty, but also ingenuity, technical advances and originality of tactical thought. What developed was an endless battle between forces above and below the surface, where a successful innovation by one side eventually produces a counter-measure by the other in a lethal struggle for supremacy. Development was not a straight line: wrong ideas and assumptions led to defeat and disaster.

The Department of the Navy strives to maintain, through its Office of Naval Research (ONR), a vigorous science and technology (S&T) program in those areas considered critically important to U.S. naval superiority in the maritime environment, including littoral waters and shore regions. In pursuing its S&T investments in such areas, ONR must ensure that (1) a robust U.S. research capability to work on long-term S&T problems in areas of interest to the Department of the Navy and the Department of Defense is sustained, (2) an adequate supply of new scientists and engineers in these areas is maintained, and (3) S&T products and processes necessary to ensure future superiority in naval warfare are provided. One of the critical areas for the Department of the Navy is undersea weapons. An Assessment of Undersea Weapons Science and Technology assesses the health of the existing Navy program in undersea weapons, evaluates the Navy's research effort to develop the capabilities needed for future undersea weapons, identifies non-Navy-sponsored research and development efforts that might facilitate the development of such advanced weapons capabilities, and makes recommendations to focus the Navy's research program so that it can meet future needs.

Beginning with anti-U-Boat efforts during the Battle of the Atlantic of World War II and ending with newly-developed tactics of the 21st Century, the authors examine the many facets of anti-submarine warfare.