41748549078781_page_187

41748549078781 | page 187 | https://thedailydialectics.com/pdfs/FIOA/41748549078781/41748549078781.pdf

re REF ID:A56914 CONFIDENTIAL ~168~ in the case of which call signs were usually omitted, the beginning and ending time of each transmission had to be recorded, so that the stations could be constantly distinguished from each other for purposes of accur— ate D/F results. Attention had to be paid to…