OK, thank you for the great explanation. I was using an ADSB receive on board. It was just funny how the age would go from 20 minutes, to 77 minutes and back to 30 minutes. It seemed to have no rhyme or reason. I also have ADSB weather onboard my aircraft via my GPS. I never saw that age over 7 minutes. I’m using a Stratux receiver, so I guess I would attribute it to that.