4 ANTIAIRCRAFT ARTILLERY FIELD MANUAL and to simultaneously supply electrical and/or selsyn data to the gun director. b. The unit will detect reasonably sized aircraft targets to medium radar ranges. For advanced aircraft target location, the radio set is equipped to automatically scan spirally 6400 mils in azimuth and any predetermined spread. of 356 mils in elevation. The data collected by the radio set in this method appear on a PPI (plan position indicator) oscilloscope or "scope," which shows indications of all targets within the range of the equipment and within the predetermined 356-mil scan of elevation. The operator of the radio set can thus locate a target, and observe it for purposes of identification when it is well beyond the firing range of the antiaircraft battery. Ficure 1—Radio Set SCR-584.
DesignationFM 4-144
EditionNov 1943
StatusSuperseded
Pages62
FunctionAviation
CollectionHistoric
Public domain (U.S. Government work)