160 to 4DME
We are complying fully with the SID, the problem is that the noise charts are just fiction. As an example on the Conga departures off 06 the inside of the turn is drawn at 90kts.
On the WAL departures again off 06, at max RTOW, turning at the correct DME it is inevitable that you go outside the turn.
I suspect that the real problem is that if the noise charts were drawn in accordance with Pan Ops the noise areas would be so wide that half of Manchester and Cheshire would be covered and nobody would ever be fined. In
PR terms with the local population that would be a disaster for the MIA.