NASA had planned extensively for the Gemini rendezvous maneuvers, building a special spacecraft just for the purpose. The Gemini-Agena Target Vehicle (GATV) was an Agena-D rocket equipped with a ...

And now, after the flawless twin launch of the Agena target vehicle and the Gemini, after making space rendezvous seem almost routine, and after the first successful docking of two spaceships ...

So they undocked from the Agena. And now because the mass was lowered, the malfunctioning thruster had a greater effect, and the Gemini started ... then a lot more to rendezvous with a second ...