forgive me if these are going to be a silly questions but...
if the mode s is interrogated from the ground station, then how does the ground station receive the mode s address for the a/c in the first place.
And a kind of similar question...if the mode s address of the other a/c is required before interrogation, how can TCAS 2 use mode s to interrogate other a/c. i allways thought TCAS relied on mode C and A...or is this the older versions?
ta if anyone replies.