digidocs
Well Known Member
Hey VAF,
Up until recently I had been planning to install a 1090 ES transponder to achieve ADS-B OUT compliance. However, I recently discovered that doing so makes it impossible to be anonymous to ATC.
No matter what you put on the dials, a 1090 ES transponder will always be transmitting a unique 24 bit code that be directly associated with your N-number. It continuously transmits your speed, altitude, GPS position, and N-number--- can you say violate-o-matic?
The 978MHz UAT transmitters incorporate an anonymous mode that eliminates this problem, but I rarely see this issue highlighted. I really hope that we'll see more sub-$2K UAT options (for use with our existing IFR GPS). Garmin are you listening?
UAT is more expensive, requires extra antennas, and is only usable in the US below 18K, but it lets us keep the ability to "squawk 1200" in an increasingly regulated environment.
David
Up until recently I had been planning to install a 1090 ES transponder to achieve ADS-B OUT compliance. However, I recently discovered that doing so makes it impossible to be anonymous to ATC.
No matter what you put on the dials, a 1090 ES transponder will always be transmitting a unique 24 bit code that be directly associated with your N-number. It continuously transmits your speed, altitude, GPS position, and N-number--- can you say violate-o-matic?
The 978MHz UAT transmitters incorporate an anonymous mode that eliminates this problem, but I rarely see this issue highlighted. I really hope that we'll see more sub-$2K UAT options (for use with our existing IFR GPS). Garmin are you listening?
UAT is more expensive, requires extra antennas, and is only usable in the US below 18K, but it lets us keep the ability to "squawk 1200" in an increasingly regulated environment.
David