Area Navigation (RNAV) and Miscellaneous Amendments

The FAA is amending its regulations to reflect technological advances that support area navigation (RNAV); include provisions on the use of suitable RNAV systems for navigation; amend certain terms for consistency with those of the International Civil Aviation Organization (ICAO); remove reference to the middle marker in certain sections because a middle marker is no longer operationally required; clarify airspace terminology; and incorporate by reference obstacle departure procedures into Federal regulations. The changes will facilitate the use of new navigation reference sources, enable advancements in technology, and increase efficiency of the National Airspace System.