On November 29^th 2018, during the 2018 SERDP & ESTCP Symposium, fifty members of the Munitions Response community gathered at the Washington Hilton for this Underwater UXO Standardized Demonstration Sites workshop. The objectives of this workshop were to establish the requirements, framework, protocols, responsibilities, and time lines for development of a series of test beds used to test, evaluate, and demonstrate acoustic, magnetic, EMI, and optical systems designed to detect and classify underwater UXO.