An excellent article Cwatters - hadn't seen it before. A good example of the problems it highlights is one of our regular destinations - Busan in Korea. Terps minima, fatal if flown to PANSOPS - as an Air China crew found out in 2002. it doesn't help that some airports in Korea use PANSOPS (Incheon and Gimpo) and others such as Busan use TERPS. Not all understand that. When our larger neighbour bough us a few years ago, we adopted their Ops manual which confidently stated that all airfields in Korea use PANSOPS. They only flew to Incheon!