So there is a lot of number jumbling going on, which is to be expected. We were responding to the title of this thread, which asks about a C146 device, which is a full, certified GPS navigator, like a Garmin 430 or 650.
Quick overview:
C129: An Enrote and Terminal certified navigator. Has a screen, databases, software, etc, all of which is certified. This is what a Garmin 430 was before it was a Garmin 430W.
C146: Adds Approach capability to C129. Many people think of this as "WAAS," but in reality, WAAS is not required, just a certain level of performance. It's just easiest to get that performance with WAAS. The fact that a GPS can use WAAS doesn't make it certified, since pretty much every $3 GPS chip in every phone does WAAS nowadays.
C145: This is *just* a GPS position sensor. It only outputs position and velocity. No screen, databases, etc. Another certified device could use this position sensor to do something more useful, like ADS-B out, or a FMS.
By 2020 all US aircraft that fly in ADS-B rule airspace will need a C145 GPS (or a C146 or C196 that has the outputs required). Nobody "needs" a C146 unless they want to use the GPS for IFR primary navigation.
Dynon would love to have a good, affordable solution for ADS-B by 2020. We've got a few years to solve that, so we have no news now, but it is a pretty clear market for us to be interested in. A fully certified C146 GPS is also interesting, but that is a tremendous project.