R in a Circle (Airport Surveillance Radar) on VFR charts

In article ,
"Bill Denton" wrote:

This is one of those threads that has taken on a misbegotten life of it's
on!

Here's an excerpt of one of my previous posts that (I think) provides the
correct answer to the original question on this thread:

The purpose of the "R" is to denote airports that have ASR where there would
be no other indication to a pilot that it existed.

I don't think anyone is contradicting this. But it's hardly the subject
of many of the articles you've been responding directly to.

Hopefully this will end it and we can move on to other fun stuff!

I guess I still don't follow... I made the mild claim that TRSAs seem
to be a lot rarer than ASRs (and else-thread pointed out that the
entire West Coast region seems to have only one or two TRSAs vs several
dozen ASRs at least). In article
you objected to this and said that because the Chicago sectional shows
one ASR and three TRSAs, this would contradict my observation.

But the Chicago sectional depicts quite a lot more than one ASR, and in
some other parts of the country the ASR/TRSA ratio is even greater. So
basically, it seems that TRSAs are relatively rare compared to ASRs. So
I don't understand your objection.

Hamish