| Identifier: | DEFND |
| NAS ID: | DEFND |
| Name: | DEFND |
| Fix Type: | Civilian |
| Fix Use: | |
| State: | MARYLAND |
| ICAO Region: | K6 |
| Latitude: | 39-19-42.080N (39.328400) |
| Longitude: | 077-28-10.940W (-77.469700) |
| Magnetic Variance: | 10.5 W as of 9/30/2025 |
| High ARTCC Area: | ZDC |
| Low ARTCC Area: | ZDC |
| Published: | Yes |
| Charts: | |
| Pitch: | No |
| Catch: | No |
| SUA ATCAA: | No |
| IAP |