Unusual Aerial Sightings Report — HMAS Adroit, April 1978

This document file contains a series of reports and administrative records regarding unidentified aerial phenomena (UAP) sightings in Australia, primarily from 1976 to 1978. The core of the file concerns a sighting reported by the crew of the HMAS Adroit on April 11, 1978. According to the report submitted by LEUT John David Napier, the crew observed a large, brilliant red, oval-shaped object while at anchor near Mitchell Point. The object was described as rising, hovering, and descending to the horizon before eventually disappearing. The crew noted that the object was bathed in brilliant red light and emitted no sound. Despite the ship's radar being in excellent condition and tracking other vessels, no radar contact was made with the object. The investigating officer, J.F. Roddy, concluded that the cause was unknown, suggesting it might be a form of light aberration due to the lack of radar confirmation. The file also includes correspondence regarding a separate sighting by a Miss Lesley Rourke in the Providence Hill area in November 1976. In this instance, RAAF Squadron Leader S.L. Harding responded to the Catholic Mission at Port Keats, noting that while no civil or military aircraft were in the area, the lights might have been satellites or the result of heavy light refraction, though he admitted this was unlikely. The file is heavily supplemented with satellite prediction bulletins from the Weapons Research Establishment in Salisbury, which were used by the RAAF to cross-reference reported sightings with known satellite passes. These bulletins provide detailed look angles for Darwin, indicating a systematic effort to rule out man-made orbital objects when investigating UAP reports.