On Mon, 20 Jun 2005 10:08:03 -0700, "Bob Gardner"
wrote:

The controller had every right to expect notification of some kind that you
were no longer on frequency.

They already told the controller they were going off-freq: " As we
approached Rantoul, we had to divert around a cell. At that point I
told Center I needed to leave the frequency to check with Flight
Watch, which was approved."