Isn't ADA required? I worked with Air Force C2 platforms for east European NATO programs and the systems I was working with (one was called ASOC) was, at it's c

Isn't ADA required? I worked with Air Force C2 platforms for east European NATO programs and the systems I was working with (one was called ASOC) was, at it's core, ADA. We also had civilian ATC in our facility and a few of those devs played on our softball team all writing ADA as well. But, it was part of the design spec and non-negotiable per FAA, Air Force, etc as far as I remember.