Newps wrote:


"Scott Migaldi" wrote in message
...

Plain language: Because they do not have the trafic load required to be
Class C but much more traffic than what is being loaded into the class D
airports.


Has nothing to do with traffic levels. We were a TRSA here at BIL and
went right into class C when that all happened across the country. A
very few just stayed TRSA's. Class D is never an option for a facility
with a radar approach control.

Really? How do you explain KRDG, an airport in Class D airspace, which
has radar approach control? There is NO TRSA.

(The apprch frequency is also not on anywhere on or next to the chart,
so one needs to use a A/FD to find the frequency. I think the ATIS
includes the frequency, and the tower will direct you to switch to
approach frequency if you contact them first, although there is no
obligation to use approach if you decline it.)