41748549078781_page_86

41748549078781 | page 86 | https://thedailydialectics.com/pdfs/FIOA/41748549078781/41748549078781.pdf

I EE -SONFIDERYEE. TDR O974 “SacI -irtormation— -70- often unnecessary, furnished unit designations, terrain data, and officers' names. Attempts to disguise operating signals and grid co- ordinates were still unsuccessful. The cryptographic systems used by the higher echelons continued to resist…