On 5 May 1954, radar personnel at the Woomera weapons-testing range acquired an unidentified target, with a visual report.

Woomera matters because it is an Australian radar-visual case at a restricted test range.
Documented
Radar personnel acquired an unidentified target
Documented
A visual report was made
Debated
The identity of the target
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.