I have received some emails suggesting that the requirement saying that ACAS cannot be factored in for safety studies was brought in by air traffic controllers to protect their own jobs. My informant asks why else would Mode C transponders be accepted for safety studies when being used for traffic advisories, but ACAS is not – when the only difference is the involvement of air traffic control personnel.
Dick, can you please post a link to these emails. If you can't, please post the details of the emails, the names of the people who sent them to you and their qualifications. Surely they wouldn't want to hide behind a false name, or no name at all? What would they have to fear?
ATCs protecting their jobs sounds a bit far fetched to me. I'm sure the emails will explain all this.
And as an ATC, I take personal exception to your statement that I would reject a safety enhancement to protect my own job!
Cheers,
NFR.