Antarctica · Deception Island (AR/CL/UK bases).Deception Island · lights over the Antarctic bases (1965)

Deception Island, an active volcanic caldera in the South Shetland Islands, was during the Cold War a point of sovereign friction: Argentines, Chileans and British maintained scientific-military bases within short distance of one another, in an overlap of Antarctic claims. That context (three watchful, mutually distrustful detachments in a single enclave) is what makes the episode interesting. In the preceding weeks moving colored lights had been reported over the Antarctic sky; the British station received notice of sightings seen from the Argentine station on June 7 and 20 (a later study places the second on June 18 and from the Chilean base only).

On July 3, 1965, in the austral polar night, at about 19:20, the Chilean base Presidente Pedro Aguirre Cerda reported a light crossing the sky; according to its communiqué nine people saw it, and astronomer Erich Paul Heilmaier, of the Catholic University of Chile, advised treating the report with reserve because the observers were untrained. Two minutes after the Chilean observation ended, at 19:42, the weather observer of the Argentine naval base Decepción saw a light of solid appearance and lenticular shape, red and green with yellow, blue and white flashes, which advanced, stopped and changed course; it was followed with the naked eye, binoculars and a theodolite, using a star as reference. The Navy form speaks of 17 witnesses, but three were Chilean NCOs visiting the Argentine base, and the commander, Lieutenant Daniel Perissé, gave 62 minutes of observation, while the communiqué says 15 to 20. Meteorologist Jorge Stanich tried to photograph it without success, because the film was of low sensitivity, it was dark and the light looked distant; no photograph was ever published. The most cited instrumental component is not Deception's but that of the naval detachment in the South Orkneys, on Laurie Island, almost 900 km away: that day, at 17:03, two meteorologists saw a round bluish-white body for 15 seconds and two variometers registered a disturbance of the magnetic field. The Condon Report examined the Orkney magnetograms on microfilm and concluded that the deviation was small, 'an order of magnitude lower' than those of a magnetic storm and within normal daily fluctuations; on Deception there was also talk of magnetic variations (astronomer Heilmaier said the Argentine station's magnetometers had recorded them), but Captain José María Cohen, of the Argentine Navy, reported that the variations registered on the Deception Island instruments were not outside the limits of normal variation. A Navy publication also acknowledges that geomagnetic measurements at the Orkneys could not be made from February to June 1965 because of instrument failures.

The Argentine Navy Secretariat released on July 6 a communiqué titled 'Sighting of unidentified flying objects in Argentine Antarctica' and later a second one on the photographic attempt and the Orkneys, an official acknowledgment uncommon for the era. On the British side, the base commander, C. D. Walter, told the Condon Report investigators that the only sighting by his party was made by the cook and was looked upon 'as rather a joke', that no scientific personnel on the island observed anything, that the Chileans placed the phenomenon above the Argentine base and the Argentines above the Chilean one, and that practical jokes on the Argentine commander were suspected. The British Antarctic Survey dated that cook's observation, by Bernard Chappel, to the night of July 2, although Chappel said decades later it was the same night as the Argentines'. Walter added that in early July, at British Base F in the Argentine Islands, a nacreous cloud coincided with a fault in the magnetic instruments, and that misinterpreted radio reports may have fed the idea of magnetic effects. The La Plata Astronomical Observatory told the press, after the Reuters dispatch of 7 July, that it had no theory on the objects, although it pointed out that the sightings occurred when the Echo II satellite was orbiting over the Antarctic zone, according to a U.S. Embassy airgram from Buenos Aires dated 4 September. FOTOCAT Report no. 3 also records a calculation by the observatory published on 31 July: Echo II, a 41 m metallized balloon that to the naked eye looked brighter than the brightest stars, could have been seen from Deception from 19:21 until shortly after 19:30, before entering the Earth's shadow. FOTOCAT found that calculation's times and directions correct but not its elevations, and ruled the satellite out for the Argentine base's light, which barely moved for an hour; commander Perissé had already said his object did not match Echo II, and, according to Roberto Banchs as quoted in the same report, after talking with the Navy the observatory's head of astrometry ended up acknowledging his "hasty opinion". The often-cited CIA document is a digest by the FBIS press-monitoring service reproducing an ANSA agency wire of July 6, not an intelligence report. FOTOCAT Report no. 3, by Vicente-Juan Ballester Olmos and three other researchers, gathered the Navy forms, the cables and the declassified British files, interviewed witnesses and concluded that the three key sightings of July 3 were most probably a meteor, Echo II and celestial bodies such as Mars, Spica or Arcturus; civil engineer Pablo Justo, who was at the Argentine base, maintains he saw only a twinkling star.

It is an early example of a navy officially releasing a sighting by its own personnel, in an enclave where three rival states had bases a few kilometers apart. That structure is what the case's legend exploits: three nations, photography and a magnetic record. Read against the primary record, each pillar weakens: there are no photos, the most cited magnetic disturbance happened at another base, almost 900 km away, and was normal, the variations mentioned on Deception were also within normal limits according to the Navy, and the observations from the three bases are neither independent nor simultaneous, with Chilean witnesses inside the Argentine base and a British report dated to another night.

The official communiqué exists, the witnesses at the Argentine base were numerous and described advances and stops, and the study proposing prosaic explanations presents them as the most probable, not as proven. But the Antarctic latitude and the long night of mid-austral winter favor exactly the stimuli that study identifies (low stars twinkling and seeming to change color through turbulence, the passage of Echo II, a meteor), the autokinetic effect explains well a light that seems to move without references, and the 1965 instrumentation (theodolite and low-sensitivity film) cannot discriminate. The case serves as a lesson in how an official communiqué and press coverage turned scattered lights into a 'tri-national sighting' with photos and magnetic effects that the record does not contain. It keeps its historical and institutional weight, with the mass concentrated in astronomical misidentification.