FB- the reason people are getting frustrated with your "dont' rely on GPS because it might get switched off" mantra is that it just isnt credible. Yes, it's
possible, but as has been explained, a temporary outage of the GPS system is not such a big deal (asked and answered). As far as credible threats- if I was assessing threats, a truck laden with fertilizer-based explosive levelling the ACC, the airport or the jet fuel supply sytems would be a much bigger dilemma. Do we not use trucks, or fertilizer, or jet aircraft? You see, not moving to ADS-B because of the possibility of interruption due to the possibility of terrorist use of GPS is, well, a bit "tin-foil hat"? Are you able to have some perspective on the big picture?
Bob
yet persist in the safety benefit arguement that ADSB gives to a C172 flying VFR between Alice Springs and Boulia below A010?
It's disappointing that you dont/wont/cant see the benefit to either a lighty,
or the airspace system of that AS departure being ADS-B equipped. Firstly, him being equipped would allow the use of smaller sep standards with other users eg that RFDS flight Med1 coming the other way, or the 737 descending inbound (or even another 172 coming the other way). There may also be direct benefit to that 172 eg. SAR/flight following as he heads out into the GAFA. Stuff that just cant happen unless there is a mega-expensive radar head turning, and he is included in the system. Not only that, I can foresee many developments down the road that just arent possible with the continuation with the 1970's technology espoused by some here (how about a panic button/mayday type feature? Who knows?).