Thursday 29 September 2022
UTC:   Local:
Thursday 29 September 2022     UTC:   Local:


Navaid Information

Navaid Facility ID:  ORD
Official Navaid Facility ID:  ORD
Navaid Facility Type:  VOR-DME
Navaid Name:  Chicago O'hare
City:  CHICAGO
State:  ILLINOIS
FAA Region: 
Latitude:  41-59-15.684N (41.9877)
Longitude:  087-54-17.347W (-87.9048)
Lat/Long Survey Accuracy:  NOS
Owner:  FEDERAL AVIATION ADMIN
Operator:  FEDERAL AVIATION ADMIN
Common System Usage:  Yes
Public Use:  Yes
Navaid Class:  L-VORW/DME
Hours of Operation:  24
Magnetic Variance:  3.9 W as of 5/8/2022
ARTCC High Altitude ID (Name):  ZAU (CHICAGO)
ARTCC Low Altitude ID (Name):  ZAU (CHICAGO)

Navaid Remarks

Navaid ID Navaid Facility Type Remarks
ORD VOR-DME 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.
ORD VOR-DME 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.
ORD VOR-DME 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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