Adequate control of this maneuver requires range and closure-rate information. Once this collision course has been established, the second step is to control the closure rate for a safe approach along the line of sight. This correction is accomplished by thrusting normal to the sight line in a direction to arrest the angular motion of this line. Analytical and Preliminary Simulation Study of a Pilot's Ability to Control the Terminal Phase of a Rendezvous with Simple Optical Devices and a Timer One method of controlling the terminal phase of a space rendezvous between two vehicles is first to correct the flight path of the controlled vehicle so that a constant line of sight is established between the vehicles.
