41748999078819_page_211

41748999078819 | page 211 | https://thedailydialectics.com/pdfs/FIOA/41748999078819/41748999078819.pdf

REF H 70 —CUNTIDEN TIAL SECO tetermatien—— MS # P-038 -191- App. III The traffic evaluation section maintained the radio traffic chart and recorded all guarded frequencies, call signs, and prosigns on lists or index cards. This reference material helped to uncover any organiza- tional changes on…