'MR' was the designation of Allied convoys (together with a numerical suffix) plying the route from Madras, India, to Rangoon, Burma with reinforcements, supplies and equipment for the defence of Burma against the Japanese 'B' (iii) invasion, and as such reciprocals of the 'RM' series (January/March 1942).

There were five such convoys, starting with MR.1 of 26/31 January 1942 with eight merchant vessels, one of them Burmese (5,143-ton Erinpura, 5,574-ton Ethiopia, 7,009-ton Karoa, 5,869-ton Kutsang, 9,182-ton Neuralia, 11,898-ton President Doumer, 4,701-ton Varsova and 3,560-ton Wing Sang). The last of the convoys was MR.5 of 26 February/3 March 1942 with four British merchant vessels in the form of Erinpura, Ethiopia, Karoa and Varsova.