=. * to reduce addressees on shot time messares to an absolute "need to know" basis which reduced relays eonsiderably, Use of a radio controlled firing mechanism aboard ESTES necessitated a period of radio silence om all cirouits below 275 mace froa shot minus 20 minuted until detonation. The only excuptions to this rejuirenent permitted were essential telezatering signals, voice time breadcasts, traffic on eireraft cantrol cireults and enxergenmy traffic. 18. Rerypted reports ef movesonte of ships ani unite within the arcs constituted a large percenage of traffic during CASTLE, To. expedite handling of soveuent reports, CJTF SEVEW proposed thet they be made unclassified. CINCPACFIT did nct concur. tm XK Harch, CTG 703 promilgeted a series of classified code words for use in move- ment reports which satisfied the reguirenent for classified reports, bub permitted aovesent report messages to be tranmitted wencrypted. Designated code words, clasaified Confidential, wore substituted for "Saiwetek” and “Bikinl® in esssages reporting sevamntse between these atolls, in which no other classified inforsstion wae included. Special movenents continued to be reported in enorypted reports of higher classification, Incorrect usage of several of the code words, sspec- dally hy linkage with identifying naviyationz] informtion, conpremised the criginel seriss of code words. Tenporarily, anvement reports were again classified Confidential and encrypted until the promigation of sore detailed instructions and a new series of code worde which was used succesafully thereafter, 7 ae CR arwuRre =