In the weeks that have passed, one would presume that the "Authorities" have contacted the Australian govt in relation to JORN (Jindalee operational radar network) project in the north of Australia.
In another industry I had a meeting with the directors of JORN a few years ago and its was astounding as to the coverage that this programme can achieve, let alone the information it can gather.
With this knowledge I'm presuming JORN would be able to track abnormal targets. One has to ask why it was not identified
JORN Radar scope