Neil Gould wrote:

Hi,

PMJI...

Recently, Jeff Saylor posted:
"Steven P. McNicoll" wrote:

The blue R in a circle symbol is used to indicate the presence of
ASR where there is no other indication. It would be superfluous at
the core airports in Class B and C airspace and TRSAs. It doesn't
matter where the approach control facility is located.

Ok, I get that, but what makes this information useful to the pilot?
For example, what is available to a pilot landing at Nantucket (Class
D, Cape Approach, R-in-circle) that is not available at Vineyard
Haven (Martha's Vineyard with Class D, Cape Appraoch, No
R-in-circle)? Both airports have a number of approaches, including
ILS that controllers can vector pilots to.

Steven gave a useful response by stating that "It doesn't matter here the
approach control facility is located."

That's true, but my question is, what maks this information useful to the
pilot? That is, how does the blue R/Circle symbol benefit the (VFR) pilot?
What is available at the airport with a blue R/Circle that is not available
at an (non TRSA or Class c&d) airport lacking the symbol?

All the pilot needs to know is who
to talk to. This information is listed in a legend on the back of the
chart. ;-)

As I mentioned earlier, that is not (necessarily) true. Take the example of
KRDG, which has the blue R/Circle symbol. Just try to find the approach
frequency for that airport anywhere on the sectional! (It isn't there, even
on the back of the chart, the side, etc..)