David Megginson wrote:

The point's well-taken, though. In the unlikely event that I went NORDO in
solid IMC *and* ATC lost RADAR at the same time, I might be at some extra
risk starting down earlier, though (hopefully) larger planes would still see
me on their TCAS if my transponder was working.

If ATC lost radar, wouldn't all transponders go dark to TCAS units? Of
course, this assumes only one radar is painting you at a time - which is
often untrue.
--
Bill "the Roadie" Carton