Jindalee Over the horizon Radar Network (JORN)
Bear in mind that Australia has never confirmed or denied that JORN was working at 0011z on 8 March 2014.
When you look at all the possible track "fits" that have been developed from the Inmarsat/AAIB Doppler handshake arcs, the skeptics would most likely ask, "How is it that a small 700km long sector of the final partial handshake arc suddenly became an area to focus on?" Furthermore, the northern end of that arc became the area of high probability.
Ignore the fact that a Chinese Coastguard vessel was deployed to the southern end of the arc, and immediately created a stir when it mysteriously heard pings while using some "makeshift" gear. Then consider that the Ocean Shield proceeded directly to the northern end of the arc and detected ULB pings on its first deployment of the Towed Ping Locator equipment.
The question of a target being detected that was traveling tangentially to the JORN arc has been raised. This would not be the case if that target was on the YPCC (Cocos Keeling Is.) to YPPH (Perth) track when you check the location of the JORN Laverton, W.A. site.
Overall, the published tracks based on guesstimates of fuel burn versus altitude and speed helped, but something else was involved for the Ocean Shield to be where it was as the ULB pings announced themselves to the world, then faded into oblivion shortly afterwards.