Bill Chalker has been interested in the physical aspects of UFOs since 1971, and especially in UFO landings. Most UFO reports are sighting accounts only. The majority are mundane, but some are spectacular. For example, in 1959 the Reverend Gill and a group of Mission workers in Papua-New Guinea reported an aerial object, complete with crew . Generally, there are very few cases which include conclusive photographic evidence, and photographic hoaxes are quite frequent.
Some hoaxes can be quite elaborate, and a number have been well documented.
Conversely, formal government enquiries have usually been just as inconclusive, or uninterested. Here in Australia, the RAAF's files on UFOs indicate a similar official lack of interest. For example, in one case three RAAF personnel reported seeing an object out to sea off the NSW coast near Eden while watching an eclipse. This account lacks detail and shows there was little follow-up. Similarly, potentially good cases involving ground sightings included verbal evidence only, and no searches were carried out to confirm evidence of physical interactions with the environment.