Diamond UAP — Harold E. Holt Naval Station, Western Australia

In late 1991, Annie Farinaccio — who worked in an administrative role associated with the Harold E. Holt Naval Communication Station at Exmouth, Western Australia — was driving from the facility late at night in company with two Australian Federal Protective Service officers when the vehicle's occupants encountered a large aerial craft at low altitude ahead of them on the road. The craft was described as diamond-shaped, elongated, and large, hovering at approximately 100 feet above the road surface. Before the vehicle could stop, the craft executed a sudden vertical ascent, disappeared momentarily, then reappeared almost instantaneously on the opposite side of the vehicle — a translocation or extreme-speed repositioning that was deeply disorienting to all three occupants. The craft then pursued the vehicle for over a kilometre as the driver accelerated away, maintaining proximity before eventually descending into scrubland ahead of them with a light visible beneath it. The two FPS officers had observed a similar craft the previous night in the same general vicinity. The Harold E. Holt Naval Communication Station is not an ordinary military installation. It is a joint US-Australian facility housing one of the most powerful very-low-frequency (VLF) radio transmitters in the world, used for communicating with submerged nuclear-powered submarines across the Pacific and Indian Ocean operating areas — a critical node in the strategic nuclear command-and-control architecture of the United States and its allies. The concentration of UAP activity in the immediate vicinity of this specific installation places the Exmouth encounters within the broader documented pattern of UAP interest in nuclear and strategic communications infrastructure. Two days after the encounter, US military officers — not Australian personnel — visited Farinaccio at her workplace. She was asked to draw the craft in detail, which she did. The officers then confiscated the photographs taken by the FPS officers during or after the encounter, along with their camera, and told her the object was a weather balloon. The combination of the confiscation of photographic evidence and the implausible weather balloon explanation constitutes a suppression attempt consistent with similar documented responses to UAP encounters near sensitive installations. Investigative journalist Ross Coulthart, who researched the case extensively, documented Farinaccio's account in his 2021 book In Plain Sight.