Media Object File Flt Ops Gen Seq02

1) The document discusses the evolution of procedures for flying non-precision instrument approaches from the 1970s to present. 2) Early approaches in the 1970s relied on ground-based navigation aids and had limited vertical guidance. Approaches evolved to provide constant descent angles and stabilized approaches by the 1980s and 1990s with improved sensors and flight management systems. 3) Modern RNAV and RNP approaches define both lateral and vertical paths and can have curved or segmented routes. They provide precision-like guidance when flown by advanced GPS-equipped aircraft.