McArthur works at the RWS surveying the ACBM during Expedition 12

ISS012-E-15190 (13 Jan. 2006) --- Astronaut William S. (Bill) McArthur, Expedition 12 commander and NASA space station science officer, maneuvers the Space Station Remote Manipulator System (SSRMS) or Canadarm2 in the Destiny laboratory of the International Space Station during a survey of the Unity node Nadir Active Common Berthing Mechanism (ACBM) to look for possible debris or damage on the sealing surface.