U.S. Army Engineer Research and Development Center (ERDC) Coastal and Hydraulics Laboratory research civil engineer David Nguyen, center, and his team calibrate and tune the motor and rudder sensors on the ERDC’s Research Vessel Martin during its commissioning in the Vicksburg, Mississippi, harbor April 1, 2021. The inland survey vessel is the first full-size, semi-autonomous craft of its kind for the U.S. Army Corps of Engineers. (U.S. Army Corps of Engineers photo by Jared Eastman)