 Rendezvous requires a precise match of the orbital velocities and position vectors of the two spacecraft, allowing them to remain at a constant distance through orbital station-keeping.Rendezvous may or may not be followed by docking or berthing, procedures which bring the spacecraft into physical contact and create a link between them.The same rendezvous technique can be used for spacecraft "landing" on natural objects with a weak gravitational field, e.g.