"Bill Denton" wrote in message
...

But approach is not associated with any particular airport. Even
though a given approach may serve only one airport, it's not
associated with that airport, it's associated with a center.


How so? Approach tends to be located at the airport it was established to
serve, not at a center.



This is why you may see approach and
departure on the same frequency.


I don't see the connection.