leadsled:
You don't need WAAS for ADS-B.
Disingenuous again. At present for ADSB you require a certified TSO 145 or better GPS source. This costs a minimum of $4000 plus installation for a "dumb" one (Freeflight 1201) and takes up cockpit real estate. The alternative is a GPS navigator starting at around $10,000.
Dynon has released an $800 WAAS enabled receiver puck that is not TSO'd but accepted as an ADSB source for American use by the FAA. There are bound to be similar WAAS enabled products in the pipeline.
WAAS enabled products are cheap and available solutions right NOW, not some circuit boards or gold plated survey solutions or pie in the sky GPSIII.
You didn't have anything to do with the development of NBN did you? Your comments regarding what Australia "needs" as opposed to what the rest of the developed world already has reminds me of that same mindset. You continually say we need something less than the international standard so we always suffer from a 10 to 20 year technology gap.