You are required to have a VFR cert.on the transponder in the aircraft every 2 years +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Thanks, Tommy. I am hoping to get that done soon. I was wanting to verify that the entire system was working properly before I took it to a shop and paid shop rates only to find something was inop. I'm hoping it will be a quick in and out now. Larry Flesner
