Aerodrome characteristics
kdhurst380,
Although the UK has its own standards for aerodrome characteristics (CAP 168) these are based on ICAO Annex 14 with a few differences, of which the Calvert system is one. The CAA cannot refuse approval to anything which complies with Annex 14, although may ask the aerodrome operator to justify the difference through a safety case/ aeronautical study. This will increasingly be the case as we move to EASA certification of aerodrome standards. MAN considered the options for approach lighting, there are benefits with both, and ultimately acted on customer preference.