|Mission type||ISS resupply|
|Mission duration||334 days (planned)|
|Spacecraft type||Progress MS|
|Launch mass||7000 kg|
|Start of mission|
|Launch date||28 October 2021 (planned) |
|Launch site||Baikonur, Site 31|
|Contractor||Progress Rocket Space Centre|
|End of mission|
|Reference system||Geocentric orbit|
|Regime||Low Earth orbit|
|Docking with ISS|
Progress MS-18 (Russian: Прогресс МC-18), Russian production No. 447, identified by NASA as Progress 79P, is a Progress spacecraft launched by Roscosmos to resupply the International Space Station (ISS). This will be the 170th flight of a Progress spacecraft.
On 3 February 2021, Roskosmos approved the updated flight program to the International Space Station for 2021, highlighted with the addition of two permanent modules to the Russian Segment of the outpost. A short tourist visit to the ISS at the end of the year also got the green light.
A Soyuz-2.1a will launch Progress MS-18 to the International Space Station from Baikonur Site 31 on 28 October 2021 on a fast-track trajectory. If the air leak repairs planned for Zevzda's PrK chamber (delivery of sealing patches aboard Progress MS-16 in February 2021) are successful, then 3 hours 20 minutes after the launch Progress MS-18 will attempt to automatically dock to Zvezda's aft port.
The vehicle is expected to dock to the aft port of the Zvezda Service Module (SM) and remain in orbit for 215 days, supporting the Expedition 66 mission aboard the ISS.
The Progress MS-18 spacecraft is loaded with 0 kg (0 lb) of cargo, with 0 kg (0 lb) of this being dry cargo.