The Flight Safety Foundation, Inc. conducted a study to research and develop a process to identify and ultimately cancel underutilized or redundant instrument approach procedures. The FAA has used the information from this study to establish criteria to use when selecting procedures for proposed cancellation.

Webdatasheet is the FAA repository of airport and NAVAID data to include the assigned magnetic variation.

Docushare contains all pertinent documentation of all published instrument flight procedure source documentation to include magnetic variation assigned to the instrument flight procedure.

A Metroplex is a geographic area covering several airports, serving major metropolitan areas and a diversity of aviation stakeholders such as NAS users, FAA , and other lines of business and airport operators. More information on Metroplex

The ILS Procedures and Components List (below) is a full list of ILS procedures and related components within the NAS . This list includes all Category I, II, III approaches as well as Special Authorization Category I and II. The sortable list can be downloaded and is updated with the normal instrument procedure charting cycle. The information contained in the ILS Procedures and Components List is extracted from Aeronautical Information Services databases. It should not be used for navigation or flight planning. Information on GPS / WAAS approaches.

The table below provides announcements and reports related to new Instrument Approach Procedure ( IAP ) development in the National Airspace System ( NAS ).