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Space Exploration

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  • $\begingroup$ The Pressurized Mating Adapters (PMAs) that were used to dock the Shuttle to the ISS were used a lot more than have the CBMs. $\endgroup$
    – David Hammen
    Commented Mar 19, 2014 at 5:56
  • $\begingroup$ @DavidHammen I read the Wikis on CBM and PMA as well as my Ref Guide to the ISS and I'm still confused. Isn't the CBM a component of the PMA? Are the Dragons et al berthing without a PMA, or is this what geoffc means to ask about? $\endgroup$
    – Jerard Puckett
    Commented Mar 20, 2014 at 2:11
  • $\begingroup$ @JerardPuckett The CBM, is how the modules connect to each other, widest opening. To connect the Russian segments Zarya to Unity the CBM on aft end of Unity has a PMA, whose other end plugs into Zarya. On the forward end of Harmony there is a CBM with a PMA attached for Shuttle docking (and future DragonRider/CST100/DreamChaser). Dragon, Cygnus, and HTV use the earth facing CBM on Harmony right now. $\endgroup$
    – geoffc
    Commented Mar 20, 2014 at 2:57