171124-N-TW634-028 ATLANTIC OCEAN (Nov. 24, 2017) Charles Kapica, right, and Ryan Ware, from Phoenix International, and Lt. Andrew Gordon monitor side-scan sonar equipment from Undersea Rescue Command (URC) on board the Norwegian construction support vessel Skandi Patagonia. Undersea Rescue Command, the U.S. Navy's only submarine rescue unit, and UUVRON 1 are mobilized to support the Argentine government's search and rescue efforts for the Argentine Navy diesel-electric submarine A.R.A San Juan (S 42). (U.S. Navy photo by Mass Communication Specialist 2nd Class Derek Harkins/Released)