| 50.1 | SEA AND COASTAL PASSENGER WATER TRANSPORT |
| Class | The name of the class |
| 50.10 | Sea and coastal passenger water transport |
| 50.2 | SEA AND COASTAL FREIGHT WATER TRANSPORT |
| Class | The name of the class |
| 50.20 | Sea and coastal freight water transport |
| 50.3 | INLAND PASSENGER WATER TRANSPORT |
| Class | The name of the class |
| 50.30 | Inland passenger water transport |
| 50.4 | INLAND FREIGHT WATER TRANSPORT |
| Class | The name of the class |
| 50.40 | Inland freight water transport |