Recommended Spacing
My own view is that 1 min spacing is sufficient for most medium to heavy aircraft. The wake from any aircraft drifts downwards and outwards from the aircraft in the worst case (Still air) Thus any aircraft following, with aproximately the same or better climb angle is going to be well above the vortex. The only time I have encountered wake has been on approach prior to G/S intercept or on NAT tracks and airways. That said, it is up to the aircraft captain to make his own decision. As long as he lets you know before he lines up
