("Stefan" wrote)
It's a pretty bad book. You calculated what it takes that one particular
glider hits one particular jet. But this isn't of any interest. The
relevant question is what it takes that in a sky full of gliders and other
aircraft, there will be a collision between any two of them.


....a collision possibility that will pass (in the case of the Hawker) in two
tenths of a second, or less.

One tenth to enter (and fill) the box, one tenth to exit (or clear) the box.


Montblack