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"Cancelling certain ground-based non-directional
beacon (NDB), and very high frequency (VHF),
omnidirectional radio range (VOR) SIAPs is one
integral part of right-sizing the quantity and
type of procedures in the National Airspace
System (NAS).
"As new technology facilitates the introduction
of area navigation (RNAV) instrument approach
procedures, the number of procedures available
in the National Airspace System has nearly
doubled over the past decade. The complexity and
cost to the FAA of maintaining the existing
ground based navigational infrastructure while
expanding the new RNAV capability is not
sustainable. Therefore, the FAA is proposing the
following list of SIAPs for cancellation based
on the criteria established in the Policy." (Notice
of Proposed Rulemaking)
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