171125-N-TW634-029 ATLANTIC OCEAN (Nov. 25, 2017) Navy

171125-N-TW634-029 ATLANTIC OCEAN (Nov. 25, 2017) Navy Diver 1st Class Robert Dwyer, from Sacramento, Calif., assigned to Undersea Rescue Command (URC), discusses submarine rescue procedures with fellow URC Sailors on board the Norwegian construction support vessel Skandi Patagonia. Undersea Rescue Command, the U.S. Navy's only submarine rescue unit, is 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)