“When EASA plan to come out with the next expensive, mandatory equipment change, they should require extended squitter. All Mode S capable transponders have to support this feature (part of the certification)”
This is not the case. The Garmin 328, the most popular mode s unit in Europe, cannot support ES at all and the Garmin 330 requires an expensive upgrade to the ES version. I am working to make it less complicated and costly to enable ADSB out using ES in the UK, but this will take time.
Rod1