Tactical Control is a term originating in the British Army to refer to a class of medium-range radar systems.
They are generally used for controlling the airspace around a set location on the ground, sometimes a dispersed battery of anti-aircraft artillery or surface-to-air missiles, but they also found use as air traffic control systems around airbases.
They generally have a high pulse repetition frequency and rotate quickly in order to provide rapid updates at the expense of reduced range.
The main purpose of these radars was to provide early warning to weapons crews, as well as "putting on" information so they could aim their gun laying radars in the general direction of the target.
The term "tactical control" remained in use during this period, and has seen some usage by other forces.