| Identifier: | COSSY |
| NAS ID: | COSSY |
| Name: | COSSY |
| Fix Type: | Civilian |
| Fix Use: | |
| State: | MASSACHUSETTS |
| ICAO Region: | K6 |
| Latitude: | 41-31-58.770N (41.533000) |
| Longitude: | 070-57-01.910W (-70.950500) |
| Magnetic Variance: | 13.9 W as of 9/30/2025 |
| High ARTCC Area: | |
| Low ARTCC Area: | ZBW |
| Published: | Yes |
| Charts: | RNAV |
| Pitch: | No |
| Catch: | No |
| SUA ATCAA: | No |
| CONTROLLER |
| ENROUTE LOW |
| IAP |