Moving the Permanent Multipurpose Module from the Unity node on the International Space Station to a connection on the Tranquility module took hours to complete, but in this 4k-resolution video it only takes a minute. Flight controllers in Houston remotely commanded the station’s robotic arm to remove the PMM, which is used as a storage area for the orbiting laboratory, and swing it into place on Tranquility. The relocation was made to free the Earth-facing port on Unity for use as a backup docking location for Commercial Crew spacecraft due to start bringing astronauts to the station in the near future.
Other changes will be made to the station during the next several months to completely outfit the unique spacecraft for spaceships under development by Boeing and SpaceX.
“The relocation was made to free the Earth-facing port on Unity for use as a backup docking location for Commercial Crew spacecraft”
I really wish that NASA’s website folks would check their facts with before posting. Commercial Crew vehicles will not be using a Common Berthing Mechanism (CBM). Visiting Vehicles rather, like the SpaceX Dragon, may be berthed at an Earth-facing CBM on Unity (Node 1) nadar or Harmony (Node 2) radar.
Commercial Crew vehicles may dock at locations only where there is a PMA and IDA installed, on Harmony (Node 2) forward and zenith ports. http://en.wikipedia.org/wiki/NASA_Docking_System
An International Docking Adapter, or IDA, will be placed on the Earth-facing port of Unity so it can be used for a spare docking location for Commercial Crew spacecraft.