| Name | Data Type | Definition | |
|---|---|---|---|
| AZIMUTH | string | The signal supports the provision/calculation of horizontal angle information. | |
| DISTANCE | string | The signal supports the provision/calculation of linear separation information. | |
| BEAM | string | The signal provides a directional guidance, in the horizontal or vertical planes. | |
| VOICE | string | The signal provides a carrier for voice information. | |
| DATALINK | string | The signal provides a carrier for data. | |
| OTHER | string | Other |