Vortex wake separation: crossing traffic
MATS Part 1 says that for operations on crossing runways, a departure whose flight path will cross the flight path of an arrival on the other runway has to wait 2, 3 or 4 mins depending on aircraft category. But what if the climbout from the departure runway crosses the arrival runway at the normal touchdown point, and this point is some way beyond the upwind end of the departure runway? In that case, the departing aircraft cannot possibly fly through the wake of the arriving aircraft since it will be several hundred feet above its flight path by the time the flight paths cross. Surely in these circumstances there is no need to apply any vortex wake separation since it is already assured?
NS