BoeingDriver99
The first mistake is to assume you have safety if within 4.2 NM for a CAT C aircraft. The accident in Busan is a good example. The report stated something like they suspected the crew didnt realize the IAP Chart used was designed to FAA TERPS criteria.So obstacles outside 1.7 NM are not surveyed. For International crew its essential to be aware different Regions design their instrument procedures to a variety of standards.