Traffic. I am saying that if someone with a lateral mind had brought in the AMATS changes earlier the accident may not have happened.
Minds were so set that BASI didn’t even recommend that the existing radar be used in future to help prevent that type of accident.
I had to introduce that idea in the 1990s.
Same resistance to copying the best and change today.
And the pilot would have been in communication under AMATS to request the safer track overhead Williamtown.