Viz (machine crypto system) allowances had been obtained for all TG 7.3 shipe except the USIS PUD c. AINJGORTH, and TaG's 39 and 40. did nut arrive in the area atil just price to HAVO. AILRSHORTH Empleyment of the YaG's prior to Hu.VO wes sach that mail or guard mail delivery of Classified messages was an acceptable alternative to anltinle encaryp—- tions. After MAVO the iroject 6.4 headquarters on Farry Island ao~ cepted communication responsibility for the YaGs when they were in port at Eninetok, and WOLALA scted as guardship for them when they were operating at sea during chots, After BRAVO, a clase 11 allowance was Placed aboard the ALNSOXTH. AL no time was CTO 7.3 ehle to send urgent’ Classified mabtcr simultaneously to el] ships in the task group by acane of 6 single rachine encrypted message. Unscheduled replacements and additions to the task group continusd the necessity of sulfiple encryp- tion ef all messaces sidressed to "P.G. 7o3%e Incorrect use of Clase IZ cryptesystens by task group unite resulted in nines reported incidents involving practices dengerons to sscnritye & The pessage of tims, duriag which commmnicztions procedures for routine TG activities were staniariised, the soveuent of CTG 723 afleat, end the concentration of ships within visual end voice cosmil= cation renge at Bikini, all served to increase the efficlonay of Kavy conamications. ‘The proximity of XSTES, BAIROKO, and CURTISS a& Mkini after BRAVO permitted the esteblishsent of AN/TRS telephone and teletype nets to serve steffs enbarked, which asterially reduced re,uirenents placed on CH ani ship-shore facilities. Use of UF voice nets, and 231 ArWAH co gk