Section 4. Services


Assign responsibility for issuing advance approach information to a specific position when more than one position could issue the data. Responsibility must be delegated in a directive in accordance with FAA Order 1320.1, FAA Directives System. Display the information so that it is accessible to the controllers having need for it.


Determine minimum IFR altitude information for each control sector and display them at the sector. This must include off-airway minimum IFR altitude information to assist controllers in applying 14 CFR Section 91.177 for off-airway vectors and direct route operations. Facility air traffic managers must determine the appropriate chart/map method for displaying this information at the sector. Facilities must submit their MIA charts for review periodically. Submit MIA charts to Aeronautical Information Services (AIS), including automated data submissions, to ensure that obstacle clearance and controlled airspace requirements are met.


  1. This may be accomplished by appending the data on sector charts or MVA charts. Special translucent sectional charts are also available. For assistance in obtaining MIA sector charts contact the Radar Video Map group at
  2. For guidance in the preparation and review of Minimum IFR Altitude charts see FAA Order JO 7210.37, En Route Instrument Flight Rules (IFR) Minimum IFR Altitude (MIA) Sector Charts.


FAA Order JO 7210.3, Para 3-8-2, Radar Mapping Standards.


Special use frequencies (296.7, 321.3, 364.8 and 369.9MHz) are controller-to-pilot communication channels established to minimize frequency changes for certain military aircraft operating in the high altitude sectors. The specific frequencies must not be publicized. However, information concerning their authorized use may be published in official military documents or in agency directives.


To the extent practicable, each ARTCC should provide IFR separation to aircraft not on IFR flight plans conducting practice instrument approaches to airports where that ARTCC provides approach control service.

  1. At locations where IFR separation is applied to VFR aircraft conducting practice instrument approaches and that airport has a non‐approach control tower or a FSS, provisions for handling such aircraft must be included in a letter of agreement.
  2. ARTCCs must issue a letter to airmen advising users of airports where IFR separation is provided for VFR aircraft conducting practice instrument approaches. The letter should include appropriate frequencies for the airport concerned.