Avionics News January 2017 - 63
PBN involves the use of arrival, approach, departure and
en route procedures that get aircraft from point A to point B
along a more-direct and fuel-efficient path than zigzagging
from one ground-based navigation aid to another. PBN also
can provide vertical navigation guidance and help aircraft
navigate safely near high terrain or in congested airspace due
to its greater accuracy.
Since the dawn of aviation, pilots have flown mostly with
reference to the ground. In the 1930s, arrows painted on
barns pointed the way. After World War II, pilots homed in on
ground-based aids to navigation (navaids), such as VORs that
are still in use, but many are being phased out.
"There will still be a need for ground infrastructure such
as VORs, but primarily for resiliency purposes," Gustin said.
"Decisions about decommissioning some VORs and other
navaids, as well as whether to put in new instrument landing
systems are being aligned with the goal of making PBN the
primary form of navigation. We will keep the equipment we
need as backup and may even add some distance measuring
equipment where needed."
PBN procedures have other advantages besides enabling
aircraft to fly more-direct routes. They can reduce the
separation between aircraft based on controllers knowing
aircraft locations within a matter of feet using GPS or the
Wide Area Augmentation System. WAAS is even more
PERFORMANCE BASED NAVIGATION
NAVIGATION STRATEGY 2016
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