with attempts to resolve classification problems arising from the unexpected rapid establishment of Johnston Island facilities. ALO Classification Division afforded the Contractor classification advice and assistance within the limits of its authority. Subsequent to the establishment of the Johnston Island facilities, a representative of the ALO Classification Division was loaned to LASL and designated as Classification Officer for TG 7.1 throughout the Johnston Island phase. Inasmuch as other Task Groups operating at Johnston Island did not have resident classification representatives,these groups were serviced as required. CHAPTER 8 COMMUNICATIONS — ELECTRONICS GENERAL 8.1 . TG 7.5 provided communications services in accordance with EPG SOP Manual, Chapter 0270. This report summarizes briefly the services provided and documents the required service improvements. A detailed technical report is included in the Contractor’s COM- PLETION REPORT, OPERATION HARDTACK, PHASEI. ORGANIZATION 8.2 It was apparent during Operation REDWING that the TG 7.5 organization to support the communications mission was in- effective because the communications functions were divided within the Contractor’s organiza- tion. This led to confusion, misinterpretation of instructions, and duplication of effort. Prior to the build-up for HARDTACK, Phase I, a Communications Division was established within HE&N’s Eniwetok organization which resulted in the successful accomplishment of the communications mission. The scope of communications work for HARDTACK was several times that of REDWING but was performed with only a 22% increase in communications personnel. A reduction in AEC communicationsstaff was also realized by shifting a larger portion of the communications program supervision to the Contractor. The organizational status of H&N’s - Communications Division at Jobsite will be continued, and it is planned that the cable installation and splicing functions will be transferred to the Communications Division to provide im- proved coordination of User requirements and professional supervision of the cable program. DESCRIPTION OF FACILITIES 8.3 TG 7.5 provided telephoneservice on all islands, except Site Fred. At the conclusion of REDWING,it was apparent the Site Elmer telephone facility was inadequate, and engineering was initiated to replace the existing manual-type system before Operation HARD8.4 On February 1958, a 700-line dial system with three-attendant cabinets was placed in service with dial tie-lines to the TG 7.2- furnished unattended dial system on Site Fred. This system provided adequate service and no further expansion is indicated, unless the popution figures greatly exceed those of HARDTACK. Of the 686 lines available, a maximum of 582 were installed, and it is felt that this numberof lines could be reduced without affecting the grade of service. 8.5 . Three 70-line PABX dial systems were procured to extend dial service to three Eniwetok Atoll camps; however, installations were made only at Sites Yvonne and Janet. The third PABX was_placed in stock after the Site Ursula camp was cancelled and is available to equip a third camp at Eniwetok Atoll or it may be utilized in Bikini Atoll after the conversion of that atoll to dial service. The Sites Yvonne and Janet evchanges were connected to the Elmer exchange by dial tie-lines; thus, all subscribers within Eniwetok Atoll could be reached by direct dialing. 8.6 During the planning for Operation HARDTACK, TG 7.1 could not be assured that the off-island PABX exchanges would withstand the blast effects; therefore, parallel services were provided from the Elmer exchange to a numberof off-island locations by direct lines. The PABX off-island installations withstood the blast effects, however, and functioned properly throughout the shot series. 8.7 The telephone service for Bikini Atoll was provided on a manual basis. It was found that the increased requirements due to dividing the two laboratory activities, placing UCRLshots at Bikini Atoll and LASL shots at Eniwetok Atoll, overcrowded the system, rendering it incapable of handling the traffic load on Site Nan. Manual exchanges were installed and operated on Sites Nan, Oboe, and How. TG 5 ig currently planning to replace the i Atoll manual system with a dia] the next full-scale test. operation. 8.8 | system before TG 7.5 funded the reinstallation of a 35-line dial system and radio equipment ard the USNS AINSWORTH at a cost of approximately $65,000. This communications equipment had beenpreviously installed for RED- COTTER AAAATAARAAAAAAAAAAAALLGG. sm PART II, CHAPTERS 7 and 8