Originally Posted by
TCAS FAN
Much as I'd like to see it, can you explain the revised 20 declared distances as runway 02/20 is both by ICAO Annex 14 and CAP 168 criteria a Code 3 runway, due to its width being less than 45 metres. This accordingly limits declared distances to less than 1800 metres. This is the case with SEN who have a total paved surface of 1856 x 36 metres and accordingly have to limit their maximum declared distances to 1799 metres.
I have taken this info from the airports Obstacle Surface Limitation Report on the planning portal. Whether its correct I have no idea!