![10/02/1997 --- The Pressurized Mating Adapter-1 PMA-1 for the International Space Station is moved..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10914 | agefotostock 10/02/1997 --- The Pressurized Mating Adapter-1 PMA-1 for the International Space Station is moved..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10914 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/fa9a65264370b7ac6350902f8b9ce0d5/gxc-s10914.jpg)
10/02/1997 --- The Pressurized Mating Adapter-1 PMA-1 for the International Space Station is moved..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10914 | agefotostock
![08/18/1997 --- The Pressurized Mating Adapter-1 PMA-1, scheduled to fly on Space Shuttle mission..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10752 | agefotostock 08/18/1997 --- The Pressurized Mating Adapter-1 PMA-1, scheduled to fly on Space Shuttle mission..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10752 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/638e332b169862b8d33983833f480632/gxc-s10752.jpg)
08/18/1997 --- The Pressurized Mating Adapter-1 PMA-1, scheduled to fly on Space Shuttle mission..., Stock Photo, Picture And Rights Managed Image. Pic. GXC-S10752 | agefotostock
![ISS Docking Module Relocates to Establish Second Commercial Crew Docking Port – ISS Expedition 50 | Spaceflight101 ISS Docking Module Relocates to Establish Second Commercial Crew Docking Port – ISS Expedition 50 | Spaceflight101](http://spaceflight101.com/iss-expedition-50/wp-content/uploads/sites/118/2017/03/KSC-98EC-0312.jpg)
ISS Docking Module Relocates to Establish Second Commercial Crew Docking Port – ISS Expedition 50 | Spaceflight101
Scott Manley on Twitter: "One question I get asked a lot, and I don't honestly know the answer to, is why the pressurized mating adapters on the ISS have this offset axis.
![The Space Shuttle Discovery is seen docked to the Pressurized Mating Adapter (PMA-2) on the International Space Station in this NASA image taken by an unidentified astronaut during the second session of The Space Shuttle Discovery is seen docked to the Pressurized Mating Adapter (PMA-2) on the International Space Station in this NASA image taken by an unidentified astronaut during the second session of](https://c8.alamy.com/comp/W0MBBB/the-space-shuttle-discovery-is-seen-docked-to-the-pressurized-mating-adapter-pma-2-on-the-international-space-station-in-this-nasa-image-taken-by-an-unidentified-astronaut-during-the-second-session-of-extravehicular-activity-during-nasa-mission-sts-120-upi-photonasa-W0MBBB.jpg)
The Space Shuttle Discovery is seen docked to the Pressurized Mating Adapter (PMA-2) on the International Space Station in this NASA image taken by an unidentified astronaut during the second session of
![S114E5399 - STS-114 - Soyuz spacecraft docked to Pressurized Mating Adapter (PMA) 1. - PICRYL Public Domain Search S114E5399 - STS-114 - Soyuz spacecraft docked to Pressurized Mating Adapter (PMA) 1. - PICRYL Public Domain Search](https://cdn10.picryl.com/photo/2011/07/21/s114e5399-sts-114-soyuz-spacecraft-docked-to-pressurized-mating-adapter-pma-cdc4bc-1024.jpg)