ARGENTINA-SUBMARINE-MISSING

Members of Argentine Navy and U.S. Navy salute the Sophie Siem vessel departing Comodoro Rivadavia harbour, after U.S. Navy Undersea Rescue Command (URC) installed its deep diving rescue vehicle - the Pressurized Rescue Module (PRM) of the Submarine Rescue Diving and Recompression System (SRDRS) - to support the search and rescue efforts for the Argentine missing submarine ARA San Juan in Comodoro Rivadavia, Chubut province, Argentina on November 26, 2017. Weather conditions for the search were good on November 25 -- better than the difficult stormy weather of the past week -- but likely to deteriorate on 26. An army of welders worked frantically to create an opening in the stern of the Norwegian offshore supply ship Sophie Siem, owned by oil company Total, large enough to accommodate an underwater rescue capsule sent by the US Navy. The US capsule can rescue up to 16 trapped submarine sailors at a time in shifts of 20 minutes, experts said. / AFP PHOTO / PABLO VILLAGRA (Photo credit should read PABLO VILLAGRA/AFP via Getty Images)