I have asked the “where does SS get its GPS data from” question on the SafeSky forum and as of yet don’t have a clear answer from the developers. I was just directed to the manual which doesn’t help !
What I’ve ended up doing is using SD on iPad with my Glo as its own entity ; i know this is reliable. And then using split screen on that iPad, running SS with my Sky Echo 2 connected but not connected to SD. This seems to give the best traffic display (as in the most traffic and the most accurate traffic display - SkyEcho2 on it’s own seems very hit and miss as far as seeing traffic is concerned). You can easily move the split in the screen left and right and even remove it by swiping. Doesn’t seem to impinge to heavily on battery consumption. No crashing or anything ……..
Just because it’s in the cockpit with you I also repeat that setup with my iPhone and another external Bluetooth GPS / SS etc. Good backup if anything goes amiss although you have to look at one app or the other on a phone. And you need to make sure you tell your devices to ignore one of the Bluetooth GPS receivers.
Interestingly, when I spoke to Garmin Tech Support some years ago about the original Glo unit, the guy said it has the same chip in it as the 6 and 750 units. You just have to make sure it’s looking up at the sky ie flat on the dash. If you sucker it to the window so you can see the LED’S, the reception is reduced.