| Added Frequency 413.6 (Windshear Data) | ericcarlson | 2024-12-01 18:26:25 |
| Updated Subcategory: (Aviation - Fixed Based Operators) | ericcarlson | 2024-12-01 18:25:47 |
| Added Subcategory: (Frederick Municipal Airport (FDK)/Federal) | ericcarlson | 2024-12-01 18:25:41 |
| Frequencies Updated (Updated: 2, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 16:57:55 |
| Frequencies Updated (Updated: 0, Deleted 1) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 16:57:28 |
| Frequencies Updated (Updated: 3, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 16:55:14 |
| Frequencies Updated (Updated: 1, Deleted 0) for Frederick Municipal Airport (FDK) | ericcarlson | 2020-07-08 16:54:11 |
| Added Subcategory: Aviation - Fixed Based Operators | ericcarlson | 2020-07-08 14:07:03 |
| Changed Subcategory Details For: Air Traffic Control | ericcarlson | 2020-07-08 14:06:22 |
| Changed category from (Airports 50) to (Frederick Municipal Airport (FDK) 50) | ericcarlson | 2020-07-08 14:06:13 |
| Category: (Amateur Radio) migrated to County: (Frederick) | ericcarlson | 2020-07-08 14:05:50 |
