A method is disclosed for assigning radar recurrences to radials to be displayed.
A converter has means receiving an antenna rotation signal (68 ) and a radar synchronization signal (SY.sub.R), and groups incident recurrences in radials to be displayed as follows
memorization of the incident radials at the rate of their arrival in one of the memories of a group of three with, as the case may be, grouping of the incident recurrence with the already memorized recurrence, with the number of memory being written in getting incremented by one unit at the first blip SY.sub.R following the reception of a blip .epsilon.; and
reading of a memory during the reception of a blip .epsilon. in order to constitute a radial, the number of the memory to be read being obtained by deducting 1 from the number of memory being written in at this moment.