Originally Posted by
A Squared
Right, I know what Mode S is and what it does. I also know that there's plenty of planes without mode S. So again, someone starts making pig noises and it seems to be coming from an area with a couple of non-mode S 1200 squawks, none of which are talking to ATC, what call sign do you call out?
Isn't 1200 still "autonomous fighter operations" in the UK?