Roger Stillick, U.S. Army Corps of Engineers (USACE), Galveston District (SWG), Advanced Data Section drone operator, controls the Z-boat, a remote hydrographic survey vessel, on a section of the Trinity River, Nov. 15, 2023. Stillick and his team will transmit the data collected to engineers for use in designing new erosion control measures for this bend of the river to protect a nearby road.