radio magnetic indicator
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radio magnetic indicator[′rād·ē·ō mag′ned·ik ′in·də‚kād·ər]
An aircraft instrument which presents a combined display of omnibearing vehicle heading and relative bearings of a radio station.
radio magnetic indicator (RMI)
An aircraft navigational instrument that, coupled with a gyrocompass or any other compass system, indicates the direction of a selected NAVAID (navigation aid) and the bearing with respect to the heading of the aircraft.