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The Remote Manipulator System (RMS), also known as the Canadian robotic arm, for the orbiter Discovery has arrived at KSCs Vehicle Assembly Building Lab. The part seen on the end is one of the joints that allow the basic structure of the arm to maneuver similar to a human arm. The RMS is used to deploy and retrieve payloads, provide a mobile extension ladder or foot restraints for crew members during extravehicular activities; and to aid the flight crew members in viewing surfaces of the orbiter or payloads through a television camera on the RMS. The arm The RMS is used to deploy and retrieve payloads, provide a mobile extension ladder or foot restraints for crew members during extravehicular activities; and to aid the flight crew members in viewing surfaces of the orbiter or payloads through a television camera on the RMS. The arm is also serving as the base for the new Orbiter Boom Sensor System (OBSS), one of the safety measures for Return to Flight, equipping the Shuttle with cameras and laser systems to inspect the Shuttles Thermal Protection System while in space. Discovery is scheduled for a launch planning window of March 2005 on mission STS-114.