 | Ocana |  | 9158264 | Europort |
| Ocean Lady | | 9237228 | Europort |
| Ocean Quest |  | 9167162 | Rotterdam |
 | Ocean Quest | | 9388766 | Europort |
 | Odessa | | 9633458 | Antwerpen |
 | Okeanis | | 9144782 | Antwerpen |
 | Okhotsk Sea |  | 9155767 | Rotterdam |
 | Oklahoma | | 9321964 | Europort |
 | Olib |  | 9334739 | Europort |
| Oliva | | 9196606 | Europort |
 | Olympic Fighter |  | 9745263 | Europort |
| Olympic Legend | | 9238868 | Europort |
| Olympiysky Prospect | | 9511387 | Europort |
| Omega Queen |  | 9283679 | Antwerpen |
| Ondina | | 9248485 | Europort |
 | Onyx | | 9169782 | Europort |
| Optimus | | 9208095 | Europort |
 | Oradana |  | 7117424 | Antwerpen |
| Orakota | | 7827330 | Cuxhaven |
| Orateca | | 8023527 | Europort |
| Oriental Green | | 9178317 | Antwerpen |
 | Orion |  | 8865640 | Cuxhaven |
 | Ottoman Nobility | | 9290359 | Europort |
| Ottoman Tenacity | | 9590682 | Europort |
| Overseas Josefa Camejo |  | 9213301 | Europort |
| Overseas Portland | | 9213325 | Antwerpen |
| Overseas Redwood | | 9607954 | Antwerpen |
| Overseas Sophie | | 9248837 | Antwerpen |
 | Overseas Takamar | | 9166560 | Antwerpen |