| Navaid Facility ID: | AL |
| Official Navaid Facility ID: | AL |
| Navaid Facility Type: | NDB |
| Navaid Name: | Alpos |
| City: | ALTON/ST LOUIS |
| State: | ILLINOIS |
| FAA Region: | |
| Latitude: | 38-51-18.224N (38.8551) |
| Longitude: | 089-56-17.034W (-89.9381) |
| Lat/Long Survey Accuracy: | |
| Owner: | FEDERAL AVIATION ADMINISTRATION |
| Operator: | FEDERAL AVIATION ADMINISTRATION |
| Common System Usage: | Yes |
| Public Use: | Yes |
| Navaid Class: | LOMW |
| Hours of Operation: | 24 |
| Magnetic Variance: | 2.2 W as of 9/30/2025 |
| ARTCC High Altitude ID (Name): | () |
| ARTCC Low Altitude ID (Name): | () |