Everybody has to have an ADS-B transponder in North America by January 1, 2020. Most in Europe already have it, where everything over 5.7 tonnes (so everything) must have it from 2017. Just kinda piggybacking off ADS-B uploaded to a satellite seems to be the easiest way to do it, as a good chunk of what they'll need is already in place.
In any event, I'm gonna go ahead and say that there's no way Edmonton Centre loses an airplane like this. Not ever. Not with the tech we've got.
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