| Talker ID | Description |
|---|---|
| !AB | NMEA 4.0 Base AIS station |
| !AD | NMEA 4.0 Dependent AIS Base Station |
| !AI | Mobile AIS station |
| !AN | NMEA 4.0 Aid to Navigation AIS station |
| !AR | NMEA 4.0 AIS Receiving Station |
| !AS | NMEA 4.0 Limited Base Station |
| !AT | NMEA 4.0 AIS Transmitting Station |
| !AX | NMEA 4.0 Repeater AIS station |
| !BS | Base AIS station (deprecated in NMEA 4.0) |
| !SA | NMEA 4.0 Physical Shore AIS Station |
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