The 11F61560 variant incorporated further modernisation, with digital flight control systems replacing the earlier analogue ones.
As of July 2013[update], eighty seven spacecraft have been launched, with sixty seven using the older model, and twenty using the newer version.
With vehicle control lost, it is expected to destructively re-enter due to orbital decay.
[1] Two Progress M spacecraft, M-14 and M-38, were modified to carry VDU attitude control systems to the Mir space station.
The upgraded Progress MS spacecraft flew for the first time in December 2015.