| Identifier: | ZEMSO |
| NAS ID: | ZEMSO |
| Name: | ZEMSO |
| Fix Type: | Civilian |
| Fix Use: | |
| State: | WASHINGTON |
| ICAO Region: | K1 |
| Latitude: | 47-38-12.960N (47.636900) |
| Longitude: | 122-07-02.910W (-122.117500) |
| Magnetic Variance: | 15 E as of 9/30/2025 |
| High ARTCC Area: | ZSE |
| Low ARTCC Area: | ZSE |
| Published: | Yes |
| Charts: | |
| Pitch: | No |
| Catch: | No |
| SUA ATCAA: | No |
| SPECIAL IAP |