In YEG's example there is plenty of time to prevent a collision
At 1220, aircraft A has been flying for 10 minutes beyond the VOR (5.9 miles a minute in still air, or 59NM).
To make up that distance, aircraft B flying at 8 miles a minute is going to take 28 minutes to catch up with aircraft A.
So in the 28 minutes after B passes the VOR, aircraft A will fly a further 165NM (+ the original 59NM) taking it to 224NM from the VOR. Aircraft B will fly 224NM also.
Thank God for radar and ADS !!
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10 West
UK ATC'er
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