U.S. Army Staff Sgt. Kevin Karraker (right), 511th Engineer Dive Detachment mission noncommissioned officer-in-charge, clears diver Sgt. David Dilmore (center, in scuba gear) after surfacing from a reconnaissance dive at Marine Corps Air Station Cherry Point, N.C., Jan. 19, 2016. The dive supervisor is responsible for examining a diver after surfacing in order to verify the diver experienced no unexpected dive-related casualties during the ascent phase, the most dangerous portion of the dive. (Courtesy photo)