Researchers from the U.S. Army Engineer Research and Development Center, the U.S. Army Corps of Engineers and the U.S. Geological Survey worked together to service a prototype underwater acoustic deterrent system (uADS) at Lock No. 19 in Keokuk, Iowa, April 2023. Part of the recent maintenance on the uADS was to replace the internal sound projectors and cabling. (U.S. Army Corps of Engineers photo by Christa Woodley)