I am trying to understand the purpose of the design in this way. But it isN't a very efficient way in war zones to be confused about all the targets requaired by radar. After all, we should be able to id friendly units in a distant way(more than 25nm) at least. I know ED team explained that iff had notihing to do with the colors of the datalink symbols. But! I am really confused why in f18 auto iff can make a target with positive mode4 respond green. It appears to me one of the systems has to be wrong. I don't have any experience with real war birds, but I find a lot of vids on Youtube, such as vids about tws muti targets attack, and their correlation functions work just fine. Hopefully, ED team can explain more than 2steps(c2 id and nctr) and tell us that in the real life the system just works exactly as such a confusing way. I THANKS ED for make my dream come true, and almost buy every module, I just want a deep learning, don't want to annoy anybody.