The name of the robotic arm used by astronauts to manipulate objects outside the spacecraft is Canadarm or Remote Manipulator System arm. This jointed robotic arm was attached to the payload bay sill of the shuttle orbiter and remotely operated by an astronaut at a control station inside the spacecraft. The Canadarm has shoulder, elbow, and wrist joints plus an end effector that serves as a grappling hand. Television cameras mounted on the arm assist the operator in precisely controlling its movements. The Canadarm was used to move payloads and position astronauts working outside the Space Shuttle or International Space Station. Canadarm2 is another Canadian robotic arm that is part of Canadas contribution to the International Space Station (ISS) and is extensively involved in the assembly of the orbiting laboratory.