"Steven P. McNicoll" wrote:

"Jeff Saylor" wrote in message
...

Thanks for the explanation, although I haven't found any more or
less radar services to be available at KACK (Nantucket, w/ the
R symbol) than at KMVY (Vineyard Haven) or even KPVC,
which was why I am curious.


The symbol indicates where the ASR is located, of course radar services are
available at other airports within range. Typically 30 miles or more.

According to a NTSB report* on the TWA 800 accident, NY TRACON has 5 radars
located at JFK airport, Newark, NJ airport (EWR), Islip, NY airport (ISP), White
Plains, NY airport (HPN), and Stewart Field airport in Newburg, NY (SWF).

JFK, EWR, ISP are in Class B or C airspace. Stewart (Class D airspace) has the
R in a circle.
White Plains does not have the R in a circle symbol.

Is there any particular reason why White Plains does not have this symbol if it
has radar?

* http://www.ntsb.gov/events/TWA800/exhibits/Ex_13A.pdf