| Navaid Facility ID: | GR |
| Official Navaid Facility ID: | GR |
| Navaid Facility Type: | NDB |
| Navaid Name: | Knobs |
| City: | GRAND RAPIDS |
| State: | MICHIGAN |
| FAA Region: | |
| Latitude: | 42-53-44.311N (42.8956) |
| Longitude: | 085-22-43.115W (-85.3786) |
| Lat/Long Survey Accuracy: | Unknown |
| Owner: | FEDERAL AVIATION ADMIN. |
| Operator: | FEDERAL AVIATION ADMIN. |
| Common System Usage: | Yes |
| Public Use: | Yes |
| Navaid Class: | LOMW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 6 W as of 8/18/2024 |
| ARTCC High Altitude ID (Name): | ZAU (CHICAGO) |
| ARTCC Low Altitude ID (Name): | ZAU (CHICAGO) |