As we all start to look at ADS-B output requirements you may think your Garmin 400W series (430W) or 500W series GPS can provide GPS position data to your new ADS-B out transponder (Garmin or Trig TT31 for example). I discovered, yes it can, but only if you have the newer software installed in your GPS that will provide the expected data feed. Mine was too many versions back.
The procedure to update is pretty simple, I'll include the Garmin instructions, but to get an idea of the procedure see https://www.bellcustomer.com/files/S...9-15-41-RA.pdf
The only real catch I can see is be SURE not to lose power mid-update, as that can leave you with a corrupted system that only Garmin can fix. I've run this on my GPS and it was pretty easy.
I have the two software cards that bring your main software to version 5.30, and the GPS to 5.0
You can see your current version by powering up your 400W/500W series GPS and look for the first text message.
Your current Main SW version must be 3.30 or newer to be compatible for this update.
Rent them from me for $50. If you are in So. Calif., you could come to KOKB and I can help you.
Just to be 100% clear this is not the NAV or obstacle data
Send me a PM if interested.