The guided-missile frigate USS Kauffman is underway with, from left, the U.S. Coast Guard cutter Thetis, the Chilean navy frigate Almirante Blanco Encalada and the Brazilian navy frigate BNS Constituicao during UNITAS Gold, the 50th iteration of the longest-running multinational maritime exercise in the world. Naval units from the U.S. are participating in several realistic tactical training scenarios with maritime forces from Brazil, Canada, Chile, Colombia, Ecuador, Germany, Mexico, Peru and Uruguay off the coast of Florida, April 20-May 5.