The most significant incident involving a UFO, mainly due to its consequences, occurred on July 3, 1965 at the Argentinean Naval Base on Decepción Island.
According to the story told by Lt. Cmdr. Daniel Perissé, who was in charge of the base, they saw an object moving silently. While it seemed solid, there was a certain lack of precision to its shape, sometimes lenticular and at others circular. Its visual aspect, of course, could have been affected by an atmospheric refraction phenomenon that could have resulted in an apparent deformation of its characteristics.
What is most notable is that the Argentinean Navy acknowledged this event in two communiqués that were issued subsequently. The total absence of sound and variations in speed are highlighted, along with the fact that it remained suspended for one minute. While sightings of this flying object occurred at night, the meteorological conditions for the area, according to the initial communiqué could be considered exceptional for the time of year.
It should also be noted that it was seen at the Destacamento Naval Argentino Orcadas, located on South Orkney, and at the moment in which the object passed over that point. Two variometers, magnetic field readers, in service at the time recorded disturbances to the magnetic field, captured on the tapes of both devices, according to the second Argentinean naval communiqué.