Section 4. Services

6-4-1. ADVANCE APPROACH INFORMATION

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 FAAO 1320.1, FAA Directives System. Display the information so that it is accessible to the controllers having need for it.

6-4-2. MINIMUM IFR ALTITUDES (MIA)

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. Forward charts and chart data records to the FIFO for certification and annual review.

NOTE-
1. This may be accomplished by appending the data on sector charts or MVA charts. Special translucent sectional charts are also available. Special ordering information is contained in FAAO 1720.23, Distribution of Aeronautical Charts and Related Flight Information Publications.

2. For guidance in the preparation and review of Mini-mum IFR Altitude charts see FAAO 7210.37, En Route Minimum IFR Altitude (MIA) Sector Charts.

REFERENCE-
FAAO JO 7210.3, Para 3-8-2, Radar Mapping Standards.

6-4-3. SPECIAL USE FREQUENCIES

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.

6-4-4. PRACTICE INSTRUMENT APPROACHES

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.

a. At locations where IFR separation is applied to VFR aircraft conducting practice instrument approaches and that airport has a nonapproach control tower or a FSS, provisions for handling such aircraft must be included in a letter of agreement.

b. 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.