Originally Posted by
JamesNoBrakes
Maybe, I don't know if TCAS is reading ADS-B for conflict resolution. The hardware and software would most certainly have to be updated. I'm wondering how long until the transponder rule goes away...
Legacy TCAS installations are not reading ADS-B to my knowledge, that would be another hardware update.
ADS-B based TCAS would provide better and more reliable target resolution but right now legacy TCAS covers more targets because most GA planes have transponders whether they need them or not. That's not the case for ADS-B, so for airliners you'd still need legacy TCAS for a good long while. At least I want it.