As a result of past military training and weapons testing activities, unexploded ordnance (UXO) exist on sites designated for Base Realignment and Closure (BRAC) on Formerly Used Defense Sites (FUDS) and other closed ranges on active installations. Munitions ranging in size from 20-mm projectiles to 2000-pound bombs can be distributed on the surface or buried at these sites showing no visible evidence of their presence. SERDP and ESTCP successfully developed and demonstrated technologies that are now widely used to detect, classify and remediate UXO on land. The programs currently focus on UXO in the underwater environment. Ponds, lakes, rivers, estuaries, and coastal ocean areas restrict access and significantly impact the performance of technologies that detect munitions. Following a decade of investment, the programs have developed emerging technologies to detect, classify, and localize UXO in the underwater environment. After testing these technologies across established demonstration sites, the programs are now transitioning to deploy them at live sites where UXO are believed to be present. This presentation will walk through several different developed technologies. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/M2S2-UXO_081524/