| 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 |