NOTE: The INT and JKT are controlled using very similar software and hardware. This section therefore applies equally to the two telescopes.
The INT is controlled by a Perkin-Elmer 3220 computer interfaced through CAMAC. This drives the main HA and Dec axes, the Cassegrain instrument rotator, the focus and the dome and provides an interface to the autoguider. Data entry is primarily by typed commands at the user interface terminal, but actions (such as a telescope slew) are initiated by pressing buttons on a control desk. Adjustments to the telescope tracking are made using a handset.
In order to plan a set of observations, the observer will have to consider
positions, finding charts, catalogue formats and the need for blind
offsetting (Section 
) and guide stars (Section
).