Progress M

Progress M, also called Progress 7K-TGM, is a Russian, formerly Soviet, uncrewed cargo spacecraft used to resupply space stations. It is a variant of the Progress series, developed in the late 1980s as a modernized version of the Progress 7K-TG, with improved systems derived from the Soyuz T and Soyuz TM crewed spacecraft. The upgraded Progress M-M introduced digital flight control in place of the earlier analog systems. The first 43 Progress M spacecraft supported Mir and later ones served the International Space Station. In total 87 were launched, 67 of the Progress M variant and 30 of the Progress M-M, and two were lost, Progress M-12M in a launch failure in 2011 and Progress M-27M in 2015. Several were converted into space tugs that delivered station modules such as Pirs and Poisk. It was succeeded by Progress MS.