How ATC sees your ADSB out

[C. Brenden]

We have recently turned the ADSB 'ON' in the en route environment. We are not using it for anything yet but we are seeing it. If you are equipped with ADSB out and your transponder is set to VFR, we'll see a limited data block (LDB) associated with a target. The LDB will contain your registration number and your altitude. Before ADSB we would just see the target and the altitude.
It can be a little confusing because some of the flight schools use a call sign associated with their school instead of their registration number. If there is no flight plan, I will see their registration number and they will be telling me their school call sign. The display is a normal full data block once we have the aircraft on a discreet beacon code and a flight plan is entered.

[az_gila]

Originally Posted by C. Brenden

We have recently turned the ADSB 'ON' in the en route environment. We are not using it for anything yet but we are seeing it. If you are equipped with ADSB out and your transponder is set to VFR, we'll see a limited data block (LDB) associated with a target. The LDB will contain your registration number and your altitude. Before ADSB we would just see the target and the altitude.
It can be a little confusing because some of the flight schools use a call sign associated with their school instead of their registration number. If there is no flight plan, I will see their registration number and they will be telling me their school call sign. The display is a normal full data block once we have the aircraft on a discreet beacon code and a flight plan is entered.

What do you see on the screen if a code is set for VFR Flight Following (no flight plan)?

[C. Brenden]

If you are equipped with ADSB out and your transponder is set to VFR (1200), we'll see a limited data block (LDB) associated with a target. The LDB will contain your registration number and your altitude. The LDB is usually slightly dimmed to help us differentiate between who is on frequency and who is not. If you call for flight following, ATC will put in a flight plan and a full data block with your call sign, altitude, and speed will then be displayed next to the target

[RVDan]

Part of the ADS-B and even Mode S ES has the ability to set a "flight ID" separate of the ICAO registration. When it does, the flight ID can be set on the transponder control by the flight crew. A flight ID is intended for use by operators with agreed to flight numbers like airlines and flight schools. I am surprised you can't see a flight ID on the tags.

[Carlos151]

Is there anything in your display that lets you know the GPS data is from a 2020 compliant or non-compliant GPS position source?
A lot of us fly with WAAS capable GPS that does not have the FAA stamp of approval.

[C. Brenden]

No. We are not officially using this data yet and all we know is the call sign. I'm sure as we get closer to 2020 things will be changing.

[DanBaier]

Originally Posted by C. Brenden

If you are equipped with ADSB out and your transponder is set to VFR (1200), we'll see ... your registration number ....

So much for being anonymous with a 1200 squawk.

Dan

[Mike S]

Originally Posted by DanBaier

So much for being anonymous with a 1200 squawk.

Dan

Yep, that is the "S" in ADSB http://www.merriam-webster.com/dictionary/surveillance

[PaigeHoffart]

Originally Posted by Mike S

Yep, that is the "S" in ADSB http://www.merriam-webster.com/dictionary/surveillance

If you're 1090 out, that would be correct. With 978 (UAT), you can still be anonymous. There are two ways they can get your tail number: your flight ID or the Mode-S Hex code. With 978, both can be set to an anonymous value if you squawk 1200.

If you're worried about it, you might want to leave your cell phone behind too.

Paige

[alcladrv]

Originally Posted by PaigeHoffart

If you're worried about it, you might want to leave your cell phone behind too.

Paige

Just curious. What does your cellphone have to do with it?