An informal demonstration of the Multi-Sensor Towbody (MuST) was carried out in Sequim Bay, WA, in September 2020. The MuST was equipped with a high-resolution sidescan sonar and a novel sub-bottom synthetic aperture sonar. The demonstration took place in an unexploded ordnance (UXO) testbed containing an assortment of inert UXO of various sizes and shapes in various orientations and burial states. Non-UXO items were also distributed in the survey region, which added to the natural and manmade clutter already present at the testbed site. MuST operations correctly detected and classified seven of nine UXO with a geolocation accuracy of about 2.5 meters.