either use rwy length or RSVA until you have 4 miles
We can't use RSVA to reduce wake turbulence separation though.
The instruction from the UK CAA specifically states that the 4nm must exist at the point the follower gets airborne, not when it paints on radar or on handover.
It will be interesting to see what sort of 'alternative means of compliance' is devised.
Interestingly, in the ICAO docs, the 4nm requirement is part of the surveillance chapter, referring to departures following the same initial track.
Maybe I could comply by turning my tower radar screen off, thus negating the requirement for the 4nm?
