World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Marina di Massa | ITQMM | Italy |
| Marina di Pisa | ITMPA | Italy |
| Marina di Pisciotta | ITMSB | Italy |
| Marina di Ragusa | ITM2R | Italy |
| Marina Grande | ITMGE | Italy |
| Marinella di Selinunte | ITMNU | Italy |
| Marino Point | IEMAP | Ireland |
| Mario Zucchelli | AQMZU | Antarctica |
| Mariupol | UAMPW | Ukraine |
| Mariveles, Luzon | PHMVS | Philippines (the) |