Chiil Monster
Thank you for the MATS info re Limited Radar.
But - how do you know these 'instances' would have resulted in collisions or merely the aircraft being a bit too 'adjacent' than the occupants would have liked. You only know aircraft were in danger of colliding by either a) it actually happening or b) accurate simulation / modelling after the event. As such you can't really make the statement above - it just isn't true.
If you don't mind me saying so, this statement is a bit daft. Obviously you don't know in all cases if a collision would have occurred. But given that two aircraft in IMC are flying converging tracks neither of which are receiving separation from an ATC unit, it would seem that there is a risk of collision even if thankfully it did not occur. It does not matter how 'adjacent' they are: they are not separated by anyone, they are not talking to anyone so the risk is there.