Pirs Docking Compartment
Pirs, also known as DC-1, was launched September 14, 2001, as ISS Assembly Mission 4R on a Russian Soyuz rocket. The Docking Compartment has two primary functions. It serves as a docking port for the docking of transport and cargo vehicles to the Space Station and as an airlock for the performance of spacewalks by two Station crewmembers using Russian Orlan spacesuits.
In addition, the Docking Compartment can transport fuel from the fuel tanks of a docked Progress resupply vehicle to either the Zvezda Service Module Integrated Propulsion System or the Zarya Functional Cargo Block. It can also transfer propellant from the Zvezda and Zarya to the propulsion system of docked vehicles – Soyuz and Progress. The docking compartment's lifetime as part of the Station is five years.
Related category MANNED SPACEFLIGHT
Text copied from the NASA Pirs Docking Compartment web page.
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