cranes were later added by the STS-96 and STS-101 missions, carried up on Integrated Cargo Carriers and installed during EVAs. Airlock specifications Length: Diameter: Weight: Volume: Docking location at the ISS Undocking and disposal On 14 July 2021, Roskosmos announced that members of the 65th expedition aboard the ISS, were preparing the Pirs module for its departure on 23 July. Since then, the Pirs module supported 52 spacewalks and served as a docking port for Russian Soyuz and Progress ferry ships carrying crew and cargo to the space station. After nearly 20 years at the International Space Station, ISS, the Pirs Docking Compartment, SO1, undocked from the nadir (Earth-facing) port of the Zvezda Service Module, SM, on 26 July 2021, at 13:55 Moscow Time (6:55 a.m. EDT) in the joint stack with the Progress MS-16 cargo ship. At the time, the spacecraft was orbiting the Earth over the Eastern China and within communications range of Russian ground stations. Within four minutes (13:59:00 Moscow Time, according to schedule), Progress MS-16 performed a short separation burn to increase distance from the ISS. The deorbiting maneuver was planned within around three hours aiming at the reentry of the Pirs/Progress stack over the Pacific. According to NASA, Docking compartment spent 19 years, 313 days 9 hours 50 minutes and 45 seconds at the station and 19 years 315 days 15 hours 10 minutes and 47 seconds in flight. Progress MS-16 initiated braking maneuver as planned at 17:01 Moscow Time (10:01 a.m. EDT) and after a 1,057-second (17.6-minute) burn, the module/cargo ship duo reentered the dense atmosphere at 17:42 Moscow Time (10:42 a.m. EDT). Gallery Outside Inside Undocking References External links Russian components of the International Space Station Spacecraft launched in 2001 2001 in Russia Spacecraft which reentered in 2021