AR 'tip'

[GraemeS]

Not really. If the angle makes it impossible to use perpberal vision then you can do either sound or quick turn of head. Knowing the mechanism, you take into account the distance, speed etc and make an educated decision (guess) based on all factors. You then bring the margin of error down from over a meter to a few inches. The more 'educated' you are at this and the more you have practiced (training and experience), the less the margin of error.

All correct and all exactly what I do. And all still only turning it from a "guess" into an "educated guess". And to go back to my original post in this thread, I found the lack of sound in that video made me feel much less confident in my decisions that I think I would be with a similar decision in a match situation.