work_against_tide_page_93

work | against tide page 93 | https://thedailydialectics.com/pdfs/work_against_tide/work_against_tide.pdf

FOP-SECREF-OMBRA_NOFORN— CONVENTIONAL COMSEC MONITORING 83 In the spring of 1967, AFSS monitored VHF/UHF unsecured communications at the Nakhon Phanom Air Base in Thailand and found frequent references to TACAN azimuth and range positioning, thus disclosing the orbits and operational areas of…