Abstract: The Antofagasta area, in the Province of Antofagasta, Chile, was investigated in September and August 1958 by two field parties of the U.S. Atomic Energy Commission and the Instituto de Investigaciones Geológicas de Chile, who were working under a cooperative agreement between the teo governments. the purpose of the investigation was to examine the area for the possible occurrence of commercial deposits of uranium.

This report discusses the controversy over fishing rights between the United States and three South American nations (Chile, Peru, and Ecuador) which culminated in the seizure of U.S. tuna fishing vessels by Peru and Ecuador in waters the U.S. considered outside their territorial jurisdiction. The main events of the controversy, diplomatic actions taken by the nations involved, and policy options are discussed.