OK, having re-read the article I may have mis-read it first time around. It states :
"The system provides a "picture" of all aircraft fitted with a mode S/ADS-B(Automatic Dependent Surveillance Broadcast) SSR transponder system within a line of site distance..."
First time around I read that to mean either Mode S/ADS-B OR traditional SSR, but on re-read I think it may just be the way they've phrased it by calling ADS-B a form of SSR.
Like I said I have had no contact with these units and am going on what I've read.
Squadgy,
I agree whole heartedly but I'm quite sure that a fast talking, pumped up switched on lawyer would try and argue that if you had info in front of you that could have prevented a collision you have a duty of care to do something, whether required by law or not- not similiar to the many debates held on this forum regarding traffic info whilst under Flight Infromation.