FlightAware Discussions

Overview Aircraft Categories available?

Very often i see aircraft rated into Categories like A1, A3, A4 etc.

Is there somewhere an overview available where the different categories are documented?
So far i was not able to identify a pattern which explain it.

Currently i have for example a B737 on my screen documented as A0, an Airbus A400M as A4 and a B748 as A5
But there are also B737 documented as A3

It is the ADS-B Emitter Category, documented in the ADS-B spec:

What you see in received messages is whatever was configured in the transponder, sometimes it is misconfigured.

1 Like

Perfect, many thanks.

Google did not give me that list…