Argentine–British Antarctica Base Encounter 1965

On July 3, 1965, a disc-shaped luminous craft was simultaneously observed from the Argentine, British, and Chilean scientific stations on Deception Island in the South Shetland Islands near the Antarctic Peninsula for approximately 30 minutes. The craft performed hovering maneuvers at low altitude before executing a series of high-speed passes over the island's caldera. Given that Antarctica is governed by international treaty and the three nations had separate scientific facilities on the same island, the encounter produced official government documentation from three independent national sources. Argentine Navy officers at Base Decepción, British personnel at Station B (Deception Island), and Chilean Air Force observers all filed official reports through diplomatic channels. The incident was noted as significant because three sovereign governments filed contemporaneous independent accounts of the same event — a multi-national cross-corroboration almost never seen in UAP documentation. The Argentine Navy's account was the most detailed and was subsequently partially declassified.