This has appeared on another forum and relates to previous thread I started about ADS-B voluntary equippage:
http://fasvig.org/easa-ga-equipment-survey-transponder-gps-collision-avoidancewarning-system
That site gives me an error “Advanced blocking in effect” (looks like some kind of rate limiting scheme).
Works OK for me.
Not that I don’t welcome any effort to increase safety but this survey appears a bit amateuristic to me:
Done.