The Center for Coastal and Ocean Mapping at the University of New Hampshire owns and operates “DriX-8”, an Uncrewed Surface Vehicle (USV) manufactured by Exail and funded by NOAA’s Office of Ocean Exploration and Research through the Ocean Exploration Cooperative Institute. The DriX vehicle was designed for acoustic survey operations, providing a high-endurance platform with hydrographic grade navigation systems and a subsea gondola for sonars. As delivered, DriX-8 was equipped with a Kongsberg EM2040 with typical full-swath capability to water depths of 200-300 m. NOAA expressed interest in future survey operations to depths exceeding 1000m and encouraged integration of a suitable sonar. Kongsberg’s re-design of their EM712 and its integration by Exail into the gondola of the DriX will be described. Data will be shown from factory and sea acceptance testing, along with preliminary operational surveys. The re-packaged EM712 installed aboard the DriX is found to produce usable data to depths exceeding 3000m, with some reduction in swath width, due to increased flow and/or propeller noise at speed at all depths.