William Butler, research physical scientist at the U.S. Army Engineer Research and Development Center’s Coastal and Hydraulics Laboratory, explains the mini robotic submersible dredge to participants at the annual Navigation and Flood Risk Management Research Area Review Groups held at CHL in April. The RARG is a nation-wide review that covers all U.S. Army Corps of Engineers districts and divisions and will inform Corps priorities for all civil works direct research and development projects.