PANAMA CITY (Nov. 8, 2021) Navy Diver 1st Class Chris Butler, assigned to Mobile Diving and Salvage Unit (MDSU) 2, reviews operating procedures of a diver recall system with a Panamanian diver from National Aero Naval Service during a subject matter expert exchange, Nov. 8, 2021. MDSU-2 Sailors and personnel assigned to the Navy's Supervisor of Salvage and Diving (SUPSALV) are conducting a salvage operation to remove a sunken vessel which has blocked Pier 3 of the Vasco Nunez de Balboa port in Panama since 2004. U.S. Naval Forces Southern Command/U.S. 4th Fleet serves as a trusted partner for Caribbean, Central and South America maritime forces leading to improved unity, security and stability. (U.S. Navy photo by Chief Mass Communication Specialist Kathleen Gorby)