"John Clonts" wrote in message
oups.com...

It means the ATC facility controlling the Class C airspace. Airspace
delegated to approach control facilities tends to be significantly
larger
than the Class C airspace contained within it. While Class C airspace
has a
radius of ten miles around the airport the airspace "owned" by the
TRACON is
probably at least thirty miles radius. If you're still on Center
frequency
as you approach a Class C boundary it's because Center forgot about you
or
you missed a frequency change
quote

But would he be in violation of 91.130(c)(1) in that scenario?


No, he wouldn't be in violation of FAR 91.130(c)(1) if he was still on
Center frequency as he approached a Class C boundary, he'd be in violation
if he crossed the Class C boundary without first establishing two-way radio
communications with the TRACON.