Mobile Servicing System (MSS) Operations: Today, the Robotics Ground Controllers powered up the MSS and maneuvered the Space Station Remote Manipulator System (SSRMS) to the start position for tomorrow's EVA. They then set up the Mobile Base System (MBS) Payload Orbital Replaceable Unit (ORU) Accommodation (POA) for the release of the failed Pump Module during the EVA. MSS performance today was nominal.