Quote Originally Posted by ahramin View Post
I think you meant very few aircraft in your experience Ron. The majority of aircraft are TCAS/ACAS equipped, and many aircraft in uncontrolled airspace are TCAS/ACAS/PCAS equipped.
What's your basis for this claim? Please point to an FAA, NTSB, AOPA, or EAA report that provides numbers.

As of January 2019, there were 294,221 aircraft on the FAA registry. If we assume that every transport-category aircraft has TCAS/ACAS (probably a reasonable assumption, since it's required for most airline flights), that's less than 7% of the entire fleet. Even if we assume every *jet* (including turboprops) has it (a fact not in evidence), that's still just 15% of the entire fleet.

The average aircraft on the FAA registry is 40 years old, which meant the majority of aircraft in the US were built at least ~10 years prior to initial certification of TCAS and more than 20 year prior to it becoming mandatory for airliners. You're saying that a majority of small aircraft owners VOLUNTARILY added TCAS/ACAS to their aircraft?

Ron Wanttaja