Firstly, GAL are adamant that PBN, the new navigation system that resulted in the change to routes, is here to stay. So there will be no straight reversal of routes to what they were before the change. Due to the significant volume of complaints generated by the introduction of PBN/PRNAV on the westerly departure route from Gatwick LAM 26 specifically, GAL have decided to redesign the route to replicate in so far as possible the flight paths prior to summer 2014.
A draft of their work was presented at the GATCOM meeting illustrating different pathways depending on the speed taken between a series of fix points. We understand that the preferred option is to enforce a maximum speed of 220 knots, illustrated by the green line in the diagram below. It is extremely difficult to tell from the plots what the likely consequences of this on the ground will be.
However, GAL have stated that the proposal will create a degree of dispersion and that the flights will be within the NPR.
Gatwick's proposals for returning flight paths to within the current approved NPR were presented at the July 2015 Gatcom meeting. We have received a number of queries about the proposals and have set out our understanding of what was presented below.
The next steps for GAL are to go out to consultation on the proposed changes. We are not sure about the detail of the consultation but understand that it will commence in September and run for 8 weeks. Following the consultation, a full trial will be implemented, at the earliest this will be January 2016. We understand that if the trial is successful, there will be no further changes.
We remain concerned about the long term implications of PBN/PRNAV on all flight paths around Gatwick due to the increase in concentration this brings. We are continuing to work with other groups around Gatwick to take seriously the concerns of people living under the flight paths.