Just saw a posted update under Alabama Medivac Listing. Went and looked at it. Showed changes for All Air Evac frequencies but, only change I could find checking our scanner was the pl tone change for Birmingham Tower. No other changes seen in what was already programmed in. Have to wonder if this was a false update as we only hear Unit 32 out of Scottsboro and may hear one transmission on Huntsville Tower a week and don't hear 15 out of Cullman at all. Think thet are shifting to frequency/system our scanner does not receive and feeding false data out to hide it.