| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Code |
Notes |
| MA | Mombasa to Aden. |
| MA | Madras to Chittagong 1943. |
| MB | Colombo to Bombay. |
| MB | Port Moresby to Fall River. |
| MC | Aden-Mombasa-Durban-Capetown. |
| MD | Madagascar to Durban, one convoy only. |
| ME | Malta East, i.e. Malta to Alexandria & Port Said. |
| MF | Port Moresby to Milne Bay & Fall River. |
| MG | Malta to Gibraltar. |
| MG | Mississippi to Galveston. |
| MH | Milford Haven to Holyhead. |
| MK | Madagascar to Kilindini. |
| MKF | Mediterranean to UK Fast Nov 1942 onward. |
| MKS | Mediterranean to UK Slow Nov 1942 onward. |
| MN | Mauritius to Seychelles. |
| MO | Marseilles to North Africa. |
| MR | Madras to Rangoon. Melbourne to Singapore Nov 41 to Feb 42. |
| MS | Melbourne to Singapore Nov 41 to Feb 42. |
| MS | Marseilles to Naples 1944 to 1945. |
| MT | Methil toTyne 1940 & 1941. |
| MT | Port Moresby toTownsville 1942. |
| MTC | Seine Bay to Southend, replacing FTC. |
| MTM | Seine Bay to Southend, replacing FTM. |
| MV | Milne Bay to Townsville. |
| MW | Malta Westward, Alexandria to Malta. |
Converted from the original by kind permission of Mrs. Gill Hague.