171124-N-TW634-170 ATLANTIC OCEAN (Nov. 24, 2017) Cmdr. Michael Eberlein, commanding officer of Undersea Rescue Command, and Chief Information Systems Technician (Submarines) Matthew Johnson, assigned to Undersea Rescue Command (URC), stand watch with fellow U.S. Sailors and Argentine sailors on the bridge of 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)