In article ,
Thomas Borchert wrote:

It often is these days.

It never is, these days, in civilian aircraft. Once again, you have no
clue.

I don't believe I'm doing this but....

um, wx radar isn't used for traffic avoidance. However, the TCAS II
system (which includes the Mode S IFF) is in fact a radar system
(radio detection and ranging). The TCAS processor interogates
and the transponder replies.

--
Bob Noel
Looking for a sig the
lawyers will hate