Silvair, More and more aircraft in the US are installing or have installed mode S. The original push was for the Traffic system that mode S has in the US. Many thousands of piston aircraft had the GTX330 installed as a result of this feature, including mine. Later on, with the ADS-B mandate, about 2/3 of the ADS-B Out installations are based on mode S, for example the GTX330ES, GTX345, Trig...