One of the major arguments against PCAS is that there is no way that all aircraft can be fitted with transponders, or that the unit will function reliably. I started this thread about PCAS, but how about now looking at the possibilities of FLARM? It is a low-power unit, which is quite cheap, and could certainly be installed in all aircraft - and provide a reliable traffic warning all the time. How about trying to get this made mandatory? If GA took the initiative on this one (it is, after all, mainly of benefit to us) then it would be ages before the next attempt by anyone to get us to fit expensive and useless equipment. FLARM may also be able to provide warnings in airliners. I certainly dont think we should base our opinion on the post from 'vihai', unless he gives us more reasons.
Surely FLARM is what we've been looking for?