| Navaid Facility ID: | HDI |
| Official Navaid Facility ID: | HDI |
| Navaid Facility Type: | NDB |
| Navaid Name: | Hardwick |
| City: | CLEVELAND |
| State: | TENNESSEE |
| FAA Region: | |
| Latitude: | 35-09-13.265N (35.1537) |
| Longitude: | 084-54-20.805W (-84.9058) |
| Lat/Long Survey Accuracy: | 1 second or better |
| Owner: | CITY OF CLEVELAND |
| Operator: | CITY OF CLEVELAND |
| Common System Usage: | Yes |
| Public Use: | Yes |
| Navaid Class: | MHW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 5.4 W as of 9/30/2025 |
| ARTCC High Altitude ID (Name): | ZTL (ATLANTA) |
| ARTCC Low Altitude ID (Name): | ZTL (ATLANTA) |