On Wed, 18 Aug 2004 20:01:52 GMT, "Steven P. McNicoll"
wrote:


"Paul Sengupta" wrote in message
.. .

Are you not supposed to ask for a frequency change before you leave them?

Or just let them know you're leaving the frequency?


You don't have to do either. You just have to maintain radio communications
while within the Class D airspace.


The problem is determining when you are clear of the controlled
airspace. I've heard more than a few horror stories about pilots
being clear by more than just a few miles (verified by GPS) and the
tower did not concur. I don't always "announce" my frequency change
but if not, I make sure I'm plenty far away before changing channels.
Rich Russell