The proposal was to add an ablative heat shield, reaction controls, and other additional subsystems needed for crewed spaceflight to the HL-10. The now space-rated vehicle would have then been launched in the space for the Lunar Module on a Saturn V launch vehicle with an Apollo CSM. Once in Earth orbit, it was planned that a robotic extraction arm would remove the HL-10 from the rocket's third stage and place it adjacent to the crewed Apollo CSM spacecraft. One of the astronauts would then spacewalk from the Apollo and board the lifting body to perform a pre-reentry check on its systems.