| Frequencies Updated (Updated: 2, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 11:57:55 |
| Frequencies Updated (Updated: 0, Deleted 1) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 11:57:28 |
| Frequencies Updated (Updated: 3, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 11:55:14 |
| Frequencies Updated (Updated: 1, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 11:54:11 |
| Added Subcategory: Aviation - Fixed Based Operators | ericcarlson | 2020-07-08 09:07:03 |
| Changed Subcategory Details For: Air Traffic Control | ericcarlson | 2020-07-08 09:06:22 |
| Changed category from (Airports 50) to (Frederick Municipal Airport (FDK) 50) | ericcarlson | 2020-07-08 09:06:13 |
| Category: (Amateur Radio) migrated to County: (Frederick) | ericcarlson | 2020-07-08 09:05:50 |
