| 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: | 4 W as of 8/18/2024 |
| ARTCC High Altitude ID (Name): | ZAU (CHICAGO) |
| ARTCC Low Altitude ID (Name): | ZAU (CHICAGO) |
| 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. |