Both the TWS and the 19 inch display are equipped with an integrated Symbol generator. In the image opposite the End User required the ability to display different video channels at the press of a button, and also, on demand, activate an aircraft instrument overlay. The Flight Instrument and Navigational data are essential for increased situational awareness while directing the Airborne Maritime Surveillance Sortie. The data is derived from an array of aircraft instruments, it is decoded within one of the Scorpio Mission computers and sent as a single composite serial data stream to the display. The integrated Symbol generator, a Caledonian RTOS Embedded Architecture design, receives the data stream and creates the required symbology.