"Quest" Joint Airlock
|CBM||International Partner Payload||International Partner Stowage||NASA Payload||NASA Stowage||ROSCOSMOS Payload||ROSCOSMOS Stowage||Space Station Subsystems|
The "Quest" Joint Airlock Module (A/L) was launched into space aboard Space Shuttle Atlantis on the International Space Station Flight 7A (STS-104) in 2001, and is large enough to fit the russian Orlan space suit aswell as the american EMU through its hatch. A larger airlock was required, since EMU spacewalks could only be performed through the Space Shuttle's airlock.
Quest airlock during installation onto Unity's (NOD1) starboard side berthing port on STS-104 in 2001 - grappled by the SSRMS.
Image Source: NASA.gov
A second crew airlock is installed on the ROS (Pirs, DC), however it is only able to fit the smaller Orlan space suit. During inactivity, the crewlock (C/L) is pressurized and serves as a stowage location for EVA supplies and two EMUs.
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