171121-N-TY130-002 ATLANTIC OCEAN (Nov. 21, 2017) Sailors assigned to Undersea Rescue Command (URC) prepare a submarine rescue chamber aboard the Norwegian vessel Skandi Patagonia to support their ongoing search for the Argentine navy submarine A.R.A. San Juan (S 42) in the Atlantic Ocean. URC is the U.S. Navy's only submarine rescue unit, 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)