Originally Posted by
chevvron
See ICAO Doc 4444 para 8.11 'The Use of Radar in the Flight Information Service.'
That's the way, in my opinion, we should be doing it and I'm told is how France and Gerrnany do it.
Yes but...... 4444 says: "The information presented on a situation display MAY be used to provide IDENTIFIED a/c with......etc." (My bold.) So before you can do anything really useful the a/c needs to be talking to you or, at best, someone else who has identified, validated and verified it. Right? Otherwise there is limited value in seeing that something is out there on your screen....