Hi John (EGNXR),
<This ones been around since V2.1 and is tied in to Atlantic ATP's that are not ADSB but somehow give out spurious position data randomly. If I reset my polar diagram I'll get the spike back in exactly the same place within a couple of days.>
Very interesting and useful reply - indeed your polar diagram spike seems to be in the same direction as the one I posted.
Would appear to be an Atlantic ATP issue rather than an AirNav RB problem, so won't pursue it on this thread.
My newly recreated Polar Diagram is pretty much the same as my old one (without the silly spike as I must have avoided receiving dodgy data from an Atlantic ATP).
However, will turn that facilty off for now - its useful for seeing my recent range for current setup - but once I know that, I don't need to use it until I move or upgrade antenna.
Many thanks
Chris