Originally Posted by IO540
The traffic reports one gets from an RIS are just as useful in practice, especially if after a report like "contact at 12 o'clock, 1 mile, recip heading, same level", and you are sitting in IMC, you say "Gxxxx, turning right 20 degrees" and do it right away
The resolution and completeness of the traffic information offered is not sufficient to make any such avoiding action reliable. I reckon there's as good a chance that you'll simply turn into a collision that you would otherwise have avoided as that the manoeuvre avoids a collision.
I've said it before here, the most valuable piece of traffic information a controller can give is one that is not currently passed under a RIS: which way do I turn to increase separation?