ILS PRM approach

ILS (instrument landing system) PRM (precision runway monitoring) approach

An instrument landing system (ILS) approach conducted to parallel runways whose extended centerlines are separated by less than 4300 ft. The parallel runways must have a precision runway monitoring (PRM) system that permits simultaneous independent ILS approaches. This permits aircraft to land closer to one another than other-wise possible. All pilots are required to undergo special training for this purpose.
References in classic literature ?
But memory turned traitor, and as if possessed by the perverse spirit of the girl, would only recall Jo's oddities, faults, and freaks, would only show her in the most unsentimental aspects--beating mats with her head tied up in a bandana, barricading herself with the sofa pillow, or throwing cold water over his passion a la Gummidge--and an irresistable laugh spoiled the pensive picture he was endeavoring to paint.