Having struggled my way through this thread, I see there are people saying PAW isn't optimum because of 'Flarm only available via OGN-R' or responding that it's 'better to have ADS-B using (e.g.) Sky Echo 2.
The thing is - and I've said this repeatedly - I fly an aircraft with Mode S transponder (GTX330-ES) but not WAAS navigators (only GNS430 installed). To transmit ADS-B out via GTX330ES I would need to add a certified GPS source for around 4K or upgrade the transponder to a unit with it's own certified GPS source. If it could be achieved for less than 1k, I'd do it. But it can't.
To transmit ADS-B out via (e.g.) Sky Echo, then currently I need to switch off the transmit function of either Sky-Echo or the transponder (question: legality of doing so? The latest rules state that you
must ensure any functioning transponder installed is switched ON.) So let's just assume I turn off the TX functionality of Sky Echo and use it only for ADS-B in - then I'm basically little more than a black hole - listening but lurking.
Concerning PAW, I added a Flarm Eagle to my unit because I wanted to see Gliders / other Flarm targets irrespective of OGN broadcasts - very few of them on the continent, unfortunately. With this setup, the only targets who can't see me are those using EC units receiving
only ADS-B in. But as most EC units typically receive Mode S warnings, I personally believe my solution, PAW with connected Flarm Eagle unit, is the optimum in terms of providing the widest spectrum of warnings to myself and to others per $$$.
20.000v in his arms but the bulb inside his head still doesn't light up........