keitaidenwa, ADS-B sounds like an interesting solution. It has some potentially devastating problems associated with its general use. The chief problem is the ability to spoof the system by introducing transmissions for phantom aircraft among the ADS-B transmissions from legitimate aircraft. If that's solved AND the range is sufficient, this would be good for routes that have suitable traffic. For AF447 it might have worked. Some folks here have mentioned being the only plane out over portions of the South Pacific for most of his flight. I believe a Chile to Oz route would enjoy such levels of flight infrequency. Then what?
{^_^}