Originally Posted by
Musket90
TCAS - Southampton's runway is Code 4C according to their EASA Certificate which can be viewed on the CAA web site. UK CAA use greater value of TODA/ASDA to determine runway coding. SOU's TODA for 02 is 1831m and for 20 1805m which being above 1799m puts it into Code 4.
I am aware of this. It appears to have been so designated by the declared distances contained in the Certificate, indicating TODAs in excess of 1799 metres. This anomaly has lasted over 40+ years and will disappear when, if the runway is extended, the declared distances are recalculated. The reason for TODAs in excess of 1799 metres I cannot explain, possibly some form of grandfather rights..
For runway 02/20 to be designated Code 4 it needs to have a minimum width of 45 metres (ICAO Annex 14 para 3.1.10 refers). If UK bails out of EASA, CAP 168 will apply, whereby Tables 3.1A and 3.2 will apply which clearly indicate a minimum width 45 metres for a Code 4 runway.