Doubtless this question has been asked before but,sorry I've not seen it on here.
It is this.Why do Controllers want to know one's IAS rather than GS and similarly HDG rather than TRK?
Two a/c's IAS will differ at differing levels for a given GS due differing temperature and density and likewise so will thier HDGs for a given Track obviously due to wind differences at different levels.Surely to Control targets on an MTI where everything is relative,GS and TRK is the most important information? Why then are we not asked for the latter?
Put me out of my misery,please!
[ 18 October 2001: Message edited by: Betty Swalls ]