The design reflected ISS logistics requirements at the time, as the
Space Shuttle provided large-capacity delivery of dry cargo and water but could not transport the
hypergolic propellants required for the station's propulsion system. To address this,
Energia reconfigured the spacecraft’s tanker section to increase propellant capacity, adding additional fuel tanks by relocating drinking water storage to the forward cargo module and nitrogen–oxygen gas storage to twelve small external tanks mounted around the interface between the cargo and tanker sections. compared to for a Progress M of the same generation. The forward pressurized cargo module could carry up to of supplies in of space, including up to of compressed air, although the combined mass of cargo and propellant was limited to . The spacecraft had a
tare weight of , and its
KTDU-80 engine, producing of thrust, used up to of propellant for maneuvers, with typically remaining available for station use. The first Progress M1 spacecraft launched on 1 February 2000 to
Mir, while the first ISS mission,
Progress M1-3, launched on 6 August 2000. A total of 11 spacecraft were flown, the last being
Progress M1-11 in June 2004, after which the type was retired. Ten conducted standard resupply missions, while
Progress M1-5 was used to deorbit
Mir in 2001. The Progress M1-M was a proposed modernized variant featuring digital flight control systems, similar to upgrades introduced on the Progress M-M spacecraft. The type was scheduled to debut as Progress M1-01M in 2011, but the program was canceled. Progress M1 spacecraft were launched on
Soyuz rockets. Eight flew on
Soyuz-U, while three (
M1-6,
M1-7, and
M1-9) launched on
Soyuz-FG. The planned M1-M variant was expected to launch on
Soyuz-2. == Specifications (Progress M1) ==