171120-N-KX129-025 COMODORO RIVADAVIA, Argentina (Nov. 20, 2017) Sailors from Undersea Rescue Command (URC) and Argentines load submarine rescue equipment onto the Norwegian construction support vessel Skandi Patagonia. Undersea Rescue Command, 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 ARA San Juan. (U.S. Navy photo by Lcdr. John Babick/Released)