Quote:
Originally Posted by rickair7777
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.
With a few exceptions - and those mostly in uncontrolled airspace - all general aviation aircraft must have ADS-B out by 1 Jan 2020.
https://www.faa.gov/nextgen/equipadsb/
This will provide BETTER coverage and more accurate coverage than TCAS alone. Keep TCAS if you want it but ADS-B - for a GA aircraft - can be had for less than $1000 with a portable unit, probably three times that linked to an in panel MFD. Having something that works even in radar blind spots and updates once a second (vs every 5-7 seconds at the edge of radar coverage) seems to me to be well worth the investment.
https://www.faa.gov/nextgen/equipads...ties/ins_outs/
Granted, closure isn’t any 1000 knots at the merge, but even some RVs can hit 200 knots. In a 400 knot merge with a tiny experimental kit plane it seems ludicrous that the two seater has better capability to insure he misses you with his ADS-B in than you have to insure you miss him with your TCAS when you are flying 121.
Just my personal opinion.