Navy Lt. Christopher Ferguson, right, sits as standby diver while fellow U.S. and South Korean divers work on constructing a simulated expeditionary wharf in the water during Foal Eagle 2016 at Chinhae, South Korea, March 10, 2016. Ferguson is a U.S. Navy Expeditionary Combat Command dive medical officer assigned to Navy underwater construction teams. Navy photo by Petty Officer 1st Class Charles E. White