Project 10073 Record Cards and CIOVI Investigation Reports — Uruguay, May 1958

This document collection contains investigation records from the Uruguayan Centro de Investigaciones de Objetos Voladores Inidentificados (CIOVI) regarding two UAP sightings in May 1958. The first incident occurred on May 4, 1958, near Sarandí del Yi, involving a cylindrical object observed by Carlos Alejo Rodríguez. The witness reported the object remained stationary for approximately five minutes, emitting a low humming noise, and lacked wings or a wake. The second incident occurred on May 25, 1958, near Punta de Abrojal, involving a spherical object observed by Colonia R. Rius, who described it as metallic and aluminum-colored, noting sudden acceleration and oscillation. CIOVI investigators analyzed these reports, noting that the descriptions were consistent with the 'flying cigar' type of unidentified object. The reports emphasize the observers' credibility and the absence of contradictions in their accounts. To provide context, the investigators included a historical reference to a June 24, 1948, encounter between an Eastern Airlines DC-3 and a large, wingless object resembling a B-29 fuselage, which reportedly maneuvered violently near the aircraft. The CIOVI reports conclude that while the 1958 sightings exhibit characteristics commonly associated with 'flying saucers'—such as specific shapes, sudden acceleration, and oscillation—the cases are officially classified as having 'insufficient data' for a definitive conclusion, partly due to the lack of personal interviews and physical evidence. The documents include standardized observation forms, maps, and narrative summaries in both Spanish and English, reflecting the systematic approach taken by the Uruguayan intelligence and research units to document these phenomena during the second trimester of 1958.