Originally posted by bsieker
And I'm sure they arrived at this figure by finding out that there were 80% fewer mid-air collisions since the mandatory introduction of ACAS-II per billion flight hours, compared to before. Or did they?
You would be sure of that if you believed risk reduction is the same as fewer actual midair collisions.
I don't have the details of how they came to their conclusion or Joernstu came to his conclusion, but I am left with a choice of believing an organization called Eurocontrol and their statements and excellent newsletter or the supposed risk evaluation of some guy on a website called Joernstu.
Choice made. I believe the collision risk is less with TCAS installed.
Interesting that they underlined "operational world" in their statement. Maybe they are reading this thread. Perhaps this "risk evaluation of would be episodes" should be sent to them and they can reply with their "bogus" data as you call it. After all, safety is our common goal.