Dramatic reductions in approach minimums at terrain-challenged airports are among the more spectacular results of applying RNP-Rnav. But more widespread benefits are promised when procedures based on the capabilities of modern aircraft supersede those that tie the airplanes to expensive ground navigational aids.
Performance Based Navigation
The vision of a future air navigation system developed by the International Civil Aviation Organization (ICAO) at the beginning of the 1990s has taken a long time to materialize. But the gradual execution of some of the main elements suggests the future may finally be at hand.
To help business aircraft operators cope with new Rnav routes and procedures that took effect last month, the FAA is developing a Web-based RAIM (receiver autonomous integrity monitor) prediction service that will be made available for general use by flight crews, according to NBAA.
Eurocontrol provided a short guide to RNP and Rnav concepts and terminology as a primer for delegates.
Performance-based navigation was identified in ICAO’s Future Air Navigation System concept of the early 1990s, which defined required navigation performance capability as a parameter “describing lateral deviations from assigned or selected track as well as along-track position-fixing accuracy on the basis of an appropriate containment level.”
The FAA is making progress toward instituting a future Rnav and RNP (required navigation performance) environment across the National Airspace System (NAS), the agency told attendees at its recent annual new technologies workshop in Arlington, Va.
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