which does have a hatch. The second grapple fixture allows the airlock and its contents to be carried along the main truss on the Mobile Base System. Airlock operations at ISS Typical Airlock Sortie for satellite deployment: Payload satellite and deployer loaded into Airlock – Crew SSRMS grapple of Airlock – Ground Transfer of Airlock power from Node 3 to SSRMS - Ground Airlock power and data cables, IMV, and EWC coax cable disconnect – Crew Install CBM Controller Panel Assemblies - Crew Hatch closure and Air Save Pump hookup to hatch Equalization Valve – Crew Air Save Pump depress – Ground Vestibule residual air depress – Ground CBM bolt disengage – Ground SSRMS maneuver to deploy position – Ground Satellite deployment – Ground SSRMS maneuver back to Node 3 Port and berth Airlock (without CBCS) – Ground Air Save Pump repress and leak check – Ground Open Hatch – Crew Relocate CBM Controller Panel Assemblies - Crew Reconnect power and data cables, IMV, and EWC coax cable to Airlock – Crew Transfer of Airlock power from SSRMS to Node 3 - Ground SSRMS ungrapple - Ground Remove payload deployer hardware left behind and stow - Crew References Components of the International Space Station Spacecraft launched in 2020 SpaceX payloads contracted by NASA 2020 in the United States