Originally Posted by
Lissart
Blimey! So you were vectoring to Deconflict under DS in class G and now all you do is pass traffic! Is this progress...?
No, that is still not the case.
There's still the:
"Issue such ATC clearances as are necessary to prevent collisions and to expedite and maintain an orderly flow of air traffic."
So if you can see traffic, or have known traffic, you still have to make sure they do not collide. Like Chevvron says, 5 nm should be good enough.
You could argue that the required vertical/lateral separation minima does not apply, and you can go a bit closer, depending on the situation. But you'll still be held responsible if you let two known aircraft collide without acting.... Class E airspace will allow you to turn an IFR flight in this case.