In conjunction with the SCR-584 Radio Set (Radar)
The RD-54/TP and RO-3/MPQ azimuth-Elevation-Range Recorders are electro-mechanical devices which will record simultaneously on paper the azimuth, height, and range data transmitted from the radar set used in conjunction with the recorders.
The RO-3/MPQ was used with the Radar Set AN~MPQ-22.
- TM 11-5534 Azimuth-Elevation Range Recorder RD-54/TP and Azimuth-Elevation Range Recorder RO-3/MPQ
19 August 1954 TM 11-5534 1954