The Hand Held Maintenance Unit allows an engineer to adjust RCS controller settings
at the controller level without having to return to the System Manager.
Powered directly from the controller, the unit has no need for batteries.

Unlike previous incarnations of the Hand Held Unit, this unit intelligently reads a list of
parameters from the controller, displaying them on a 4 x 20 Liquid Crystal Display.

The various functions and settings of the RCS controllers are displayed in menu format
which can be easily navigated using the cursor, [ENT] and [ESC] keys.