| Code | Use |
|---|---|
| 8MIDXXXXX | Diver’s radio (not used in the U.S. in 2013) |
| MIDXXXXXX | Ship |
| 0MIDXXXXX | Group of ships; the U.S. Coast Guard, for example, is 03699999 |
| 00MIDXXXX | Coastal stations |
| 111MIDXXX | SAR (Search and Rescue) aircraft |
| 99MIDXXXX | Aids to Navigation |
| 98MIDXXXX | Auxiliary craft associated with a parent ship |
| 970MIDXXX | AIS SART (Search and Rescue Transmitter) |
| 972XXXXXX | MOB (Man Overboard) device |
| 974XXXXXX | EPIRB (Emergency Position Indicating Radio Beacon) AIS |
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