M
- MA. Mombasa to Aden
- MA. Madras to Chittagong 1943 (reverse AM)
- MB. Colombo to Bombay (reverse BM)
- MB. Port Moresby to Fall River
- MC. Aden to Cape Town (reverse CM)
- MD. Madagascar to Durban
- ME. Malta to Egypt ("Malta Eastward") (reverse MW)
- MF. Port Moresby to Milne Bay (reverse FM)
- MG. Malta to Gibraltar (reverse GM)
- MG. Mississippi to Galveston (reverse GM)
- MH. Milford Haven to Holyhead (reverse HM)
- MK. Madagascar to Kilindini (reverse KM)
- MKF. Mediterranean to UK Fast 1942-45 (reverse KMF)
- MKS. Mediterranean to UK Slow 1942-45 (reverse KMS)
- MN. Mauritus to Seychelles
- MO. Marseilles to Oran (reverse OM)
- MR. Madras to Rangoon (reverse RM)
- MS. Melbourne to Singapore 1941-42
- MS. Marseilles to Naples 1944-45 (reverse SM)
- MT. Methil to Tyne 1940-41
- MT. Port Moresby to Townsville 1942
- MTC. Seine to Southend coaster (reverse TMC)
- MTM. Seine to Southend military (reverse TMM)
- MV. Milne Bay to Townsville
- MW. Alexandria to Malta ("Malta Westward")
- MWS?
Read more about this topic: List Of World War II Convoy Codes