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NAVAID INFORMATION AS PUBLISHED ON 20 JULY 2017


ORD
CHICAGO O'HARE VOR/DME
CHICAGO, IL

Location

   Lat/Long: 41-59-15.684N / 087-54-17.347W   (41.9876900/-87.9048186)
  Elevation: 649.3 ft.
  Variation: 02E (1965)

Operational Characteristics

                          Type: VOR/DME 
                         Class: L-VORW/DME 
                     Frequency: 113.90 
                 TACAN channel: 086X 
                 Altitude code: L (low) 
          Use at high altitude: yes 
            Hours of operation: 24 
                      Voice ID: no 
                      Morse ID: --- .-. -.. 
                NOTAM facility: ORD 
                           FSS: 
        FSS hours of operation: 24 

Technical Characteristics

                      Accuracy: NOS 
                    Monitoring: Internal monitoring plus status indicator
                                at control point 
                         Owner: FEDERAL AVIATION ADMIN 
                      Operator: FEDERAL AVIATION ADMIN 
           Common system usage: yes 
                For public use: yes 

Remarks

  1. HIWAS BROADCAST.
  2. VOR PORTION UNUSBL 140-155 DEG BYD 15 NM; 100-140 DEG BYD 35 NM BLO 2500 FT, & 155-060 DEG BYD 35 NM BLO 2500 FT.
  3. DME UNLOCKS CAN OCCUR PERIODICALLY DUE TO GROUND STATION OVERLOAD WHEN MORE THAN 100 ACFT INTERROGATIONS ARE RECEIVED AT THE SAME TIME. THE PROBLEM MAY OCCUR WHEN ACFT ARE BEING HELD IN THE CHICAGO-O'HARE TERMINAL AREA AWAITING APCH CLNC AT O'HARE. POSSIBILITIES OF THE PROBLEM OCCURRING ARE REDUCED BY USERS DEACTIVATING INTERROGATORS DURING NONUSE OR SWITCHING TO AN ILS DME WHENEVER POSSIBLE. DEACTIVATING INTERROGATORS ON THE GROUND IS ESPECIALLY IMPORTANT SINCE NEARBY ACFT CAUSE MORE OVERLOAD THAN DISTANT ONES.

 
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