Unusual Aerial Sightings (UAS) Policy – Defence Instructions (General) ADMIN 55-1

The document reviews the RAAF's long-standing role in receiving and evaluating UAS reports dating back to the 1950s. Analysis of accumulated data showed that approximately 90% of sightings were attributable to known phenomena such as aircraft, satellites, meteors, balloons, or astronomical objects, with only a very small percentage (around 3%) remaining unexplained due to insufficient information rather than extraordinary characteristics. It concludes there is no scientific or defence value in continuing dedicated resources for investigation or archiving of routine reports. Exceptions are retained for cases suggesting potential threats to safety, security, or involving man-made space debris. The policy change was implemented quietly to avoid unnecessary public speculation, aligning with similar conclusions in other nations' reviews such as the Condon Report. Responsibility for non-defence related sightings shifted away from the military, with the RAAF ceasing active UAS programs by the mid-1990s.