Originally Posted by
BoeingDriver99
I did a search but didn’t find anything helpful.
Some airports/ATC have asked crew to switch their transponder to ‘ground mode’ after vacating the runway. On the A320 there is no specific switch that directly says ground mode.
What exactly is ATC asking for? Turning off Mode S? In which case selecting the transponder from “ON” to “AUTO” would be the correct selection?
A similar but separate question for the A320 - if you select transponder “ON” but ALT RPTG to “OFF” in your altitude still transmitted?
Thanks,
BD
The airbus XPDR ground logic means that mode S will be active regardless of auto/on. If you mean that ATC are requesting mode A (callsign only), then turning ALT RPTG to OFF will do this. With ALT RPTG off, altitude data is not reported.