Master distance measuring equipment (DME) display without a selector switch
The KDI 574 is a master distance measuring equipment (DME) display without a selector switch. You can use it with an external switch, or it can be dedicated to a specific DME. It simultaneously displays distance, ground speed, and time to station, along with indicating if you are in NAV 1, NAV 2, or DME HOLD mode. DME HOLD allows the DME to stay on the current frequency, while the navigational receiver is re-tuned to another.
Comes with an indicator for area navigation (RNAV) to let you know if the displayed distance and time are to a waypoint or a radio navigation beacon.