Originally Posted by
His dudeness
Just out of interest: its almost exclusively used in the UK - is the UKs radar environment so much different from the others ? Never had to squawk ident out of Amsterdam or Frankfurt or other real busy airports. Or is it just one of these things that always had been done ? Should not Mode S give you all the required info ?
Lots of info in Mats part 1 about how to identify via Primary, mode A and mode S.
Mats part 1, chapter 6, section 4 onwards
Mode S ident would rely on the controller correlating the Mode S address from the radar with the Mode S address from the flight plan and that’s not present on the flight progress strip.