Lots of the reports on this calamitous event quote that the aircraft was lost from ATC radar. Do they have ATC radar based on the southern end of Sulawesi? Do they, in fact, have chain coverage of the intended flightpath of the aircraft?
It would appear that they don't. Conversely, if radar coverage does exist, some critical part would appear to have been unserviceable at the time of the disappearance. If all radar had been serviceable then surely the ATC responsible would have been able to more accurately pinpoint the track and point at which the aircraft went missing off screens?