![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. 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.](https://pbs.twimg.com/media/Ea-hYTlUEAAYOPE.jpg)
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.
![STS098-331-001 - STS-098 - Common Berthing Mechanism (CBM) on Pressurized Mating Adapter (PMA) 2 - NARA & DVIDS Public Domain Archive Public Domain Search STS098-331-001 - STS-098 - Common Berthing Mechanism (CBM) on Pressurized Mating Adapter (PMA) 2 - NARA & DVIDS Public Domain Archive Public Domain Search](https://cdn10.picryl.com/photo/2011/07/21/sts098-331-001-sts-098-common-berthing-mechanism-cbm-on-pressurized-mating-4b5950-640.jpg)
STS098-331-001 - STS-098 - Common Berthing Mechanism (CBM) on Pressurized Mating Adapter (PMA) 2 - NARA & DVIDS Public Domain Archive Public Domain Search
![03/10/1998 --- Node 1, the first U.S. element for the International Space Station, Stock Photo, Picture And Rights Managed Image. Pic. GXC-S12468 | agefotostock 03/10/1998 --- Node 1, the first U.S. element for the International Space Station, Stock Photo, Picture And Rights Managed Image. Pic. GXC-S12468 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/563ddf9a0645e5bac75a7a447d558c80/gxc-s12468.jpg)