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by ddinh
3375 days ago
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It's fairly standard practice, as long as the aircraft involved are certified for it and flying on autopilot. Given that the planes involved were flying at FL350-60, they probably were (altitudes above a certain threshold - FL290 in the US) are restricted to aircraft operating under rules allowing 1000ft vertical separation. https://en.wikipedia.org/wiki/Reduced_vertical_separation_mi... |
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