As part of the CAA’s Post Implementation Review of the RNAV-1 SIDs at Gatwick Airport (CAP 1346) it was noted that the new RNAV SIDs did not achieve adequate replication of the existing conventional SIDs on Route 4.  This particular departure presented unique challenges due its wraparound nature and requirement to follow the existing NPR. Cyrrus designers were able to use innovative development coupled with manipulation of ARINC Path-Terminators to design a new RNAV SID that provides a degree of track dispersion whilst remaining within the NPR in normal meteorological conditions.

More information can be found on the Gatwick Airport website:

http://www.gatwickairport.com/business-community/aircraft-noise-airspace/airspace/our-blog/