Originally Posted by punkalouver
I fully agree that there are probably technical shortcomings and PBL is quite possibly aware of them. Have never said different
That statement is hard to reconcile with your statement that it is "irresponsible" for me to publish them on this forum.
You list five midair collisions in the US in 11 years to 1978, and then there was one in the next 13 years until TCAS was mandated. It is hard to tell what you want to make of these figures, such as they are. But you do not attempt to account for confounding factors, and that omission is going to invalidate any conclusions you may want to draw.
The most obvious confounding factors are that there were two major revisions of airspace in the U.S. in those thirteen years from 1978 to 1991. The introduction of TCAs and then "Class" airspace had far more effect of separating commercial fast jets from GA traffic than any technical collision avoidance system could have had. If you think the midair collision figures say anything at all, then they say at least that.
PBL