171122-N-TW634-057 ATLANTIC OCEAN (Nov. 22, 2017) Fire Control Technician 1st Class Alvin Miller, assigned to Unmanned Undersea Vehicle Squadron 1 (UUVRON 1), performs maintenance on a Bluefin-12D, an unmanned underwater vehicle, on board the Norwegian construction support vessel Skandi Patagonia. Undersea Rescue Command, the U.S. Navy's only submarine rescue unit, and members of UUVRON 1 are mobilized to support the Argentine government's search and rescue efforts for the Argentine Navy diesel-electric submarine ARA San Juan. (U.S. Navy photo by Mass Communication Specialist 2nd Class Derek Harkins/Released)