The Engine Instrument Display System (EIDS) is designed specifically as a low-cost upgrade of the C-130 engine instrument cluster, replacing primary and secondary engine indicators. The Primary Flight and navigation Displays are designed to replace the existing EADI and EHSI display, altimeter, airspeed, and vertical speed indicators. The IS&S Flat Panel Display System (FPDS) is an easily installed cockpit upgrade for the C-130 aircraft.