I have a Becker BXP 6401 transponder in my Jodel.
I have noticed that I’m not visible on Flightaware and similar sites. It seems the reason is that the transponder is not sending an ADS-B signal, because I don’t have a GPS connected to it.
Could you please recommend an affordable GPS for this purpose? My aircraft is non-certified, so the GPS doesn’t have to be I reckon.
Would installing a (Power-) FLARM work with the transponder. Then I’d also have an ADS-B input, not just out…
Thanks,
Michael
I spoke with the very responsive and helpful Becker support in Germany today, and got the following information:
I was also told the ADS-B on this transponder is “not certified”, in principle any (non-certified) GPS will do. So this seems to imply SIL=0, right?
Probably 
Unless they detect the GPS grade and adjust the SIL flag accordingly.
Zorg wrote:
I have noticed that I’m not visible on Flightaware and similar sitesYou only need mode S for that.
Arne wrote:
You only need mode S for that.
But you rely on MLAT and so need to fly high enough to be picked up by enough receiving station. As the OP is in a montainous area that might be the problem.
