| Carrier Code | Carrier Name |
| MRIC | MARINE CONTRACTING & TOWING COMPANY |
| MRKT | MERKLAND LTD |
| MRKW | MARINA TANKER CORPORATION |
| MRMP | MIRASTAR MARITIME PANAMA S A |
| MRMU | MERMAID CONTAINERS LTD |
| MRNA | MARINE RAIL LINES |
| MRNT | MORAN TOWING & TRANSPORTATION CO INC |
| MRNW | MARINE NAVIGATION CORPORATION |
| MROG | MARINERO NAVIGATION CO LTD |
| MRPT | MERPITT, JOHN A AND CO |
| MRPU | MAROPOL BV |
| MRSH | MERCER SHIPPING INC |
| MRSU | MARINE REPAIR SERVICE INC |
| MRYB | MARYLAND INTERNATIONAL TERMINALS INC |
| MRZU | MARENZANA TRASPORTI |
