Originally Posted by
mnttech
Sad day to all of those families involved. all share the issue that the two aircraft transponders must be able to either see the ground station (TAS, ADS-B IN)
Don't know if this is the correct venue to discuss the technical side, but TAS needs no ground station as it is standalone and can read xspndr signals directly with the onboard unit. Perhaps you are thinking of TIS which does require a ground connection function and is currently limited to select areas. With TAS all the aircraft discussed here would have been shown on the indicator in real time with the appropriate equipment installed. A most unfortunate accident.
Originally Posted by
Torquetalk
Is there ever a good reason why you wouldn’t have your transponder on?
There are still many areas here where aircraft can fly without transponders which makes TAS and other similar devices not a 100% foolproof solution.