Southern direction
On all probabilities its in the southern Indian Ocean. Suicide / hijack whatever but a deliberate act by someone or someones. Engines running at 7hrs is not a good sign given fuel exhaustion would have been minutes away.
The RAAF are deploying for a search along the 40 deg line area. Maybe a P3 will get lucky as I believe JORN was not operating. I assume that the depths will be too great for a CVR/FDR recovery assuming any wreckage is ever located to pinpoint them.
Will go down as a great aviation mystery. I wish it were in the Stan's but if it was it would no longer be a secret.