A fundamental problem in the design of a remotely controlled handling device is the command and data link. Where the handling device is to have limited mobility a direct-wired system is suitable. Where greater mobility and a large number of control functions are required a multiplex type control system and data link becomes more attractive. For mobility over greater distances, radio control may be used.
The Hughes Mobot Mark II is an example of the second system. Technical details of Mobot Mark II are given and experience with reliability, maintainability, and operator training requirements are presented. The adaptation of this control system to a radio control and data link is also outlined.