Integrated Standby Unit

The IS&S Integrated Standby Unit (ISU) calculates, processes and displays altitude, attitude, airspeed, slip/skid, and navigation display information into a logical and concise single instrument display.  The unit is designed to support additional enhancements for Radio Management and Alternate navigation functionality.

The ISU includes the latest breakthrough in MEMS Gyro technology coupled with unparalleled history of IS&S air data, RVSM and Flat Panel Display System (FPDS) product experience.  The result is a highly reliable and accurate standby display system for retrofit and OEM applications.


  • Advanced display technology
  • Versatile interface capability
  • Highly accurate data sensors
  • DG Mode with 15 degrees per hour heading stability without use of magnetometers
  • Software RTCA DO-178B Level B
  • Complex Electronic Hardware: RTCA DO-254 Level B
  • Hardware Qualification: RTCA DO-254 Level B
  • ILS/VOR via configurable ARINC 429 inputs
  • Reduced pilot workload
  • Increase safety
  • Logistics and maintenance benefits by integrating multiple functions into one LRU


  • NVIS
  • External magnetometer interface
  • Standby Radio Management Unit (RMU)
  • Alternate Navigator Functionality
  • RVSM Compliance