The procurementof the necessary laboratory equipment, supplies, and personnel to activate the identification system was accomplished by 1 September 1952. By delegation of authority from CJTF 132, access to the classified areas at Eniwetok Atoll (except on Eniwetok Island) during Operation Ivy was controlled by the J-2 Section, TG 132.1. Liaison was established with TG 132.2; Provost Marshal, TG 132.3; Marine Guard Detachment; and TG 132.4 Air Police Commanderin order to carry out this authority. During Operation Ivy ‘over 7000 badges were issued, including exclusion-area exchange badges and necessary badge replacements due to changes in the access requirements of personnel and to lost and damaged badges. Over 10,000 permits were issued, which included temporary Parry Island permits, temporary badge permits, and temporary exclusion-area permits. Two additional security assistants were detailed to the J-2 Section from the Los Alamos Field Office, AEC, and were utilized to provide security coverage to critical areas, both afloat and ashore at Eniwetok Atoll. As part of Operation Ivy it was necessary to provide pro- tection to weapon components being transported from SFOO facilities to the point of embarkation from the ZI and on the return trip. Because the Security Section was designated as a Source and Fissionable Materials accountability station, accountable for all such materials used in Operation Ivy, it was necessary to prepare the required inventories, expenditure reports, and shipping documents for the materials utilized. 3.17 COMMUNICATIONS 3.17.1 Mission The missions of the TG 132.1 Communications Section included the following: t 1. Preparation of communications and electronic plans for TG 132.1 and coordination of the communications requirements of the scientific programs with Headquarters, JTF 132 and the AEC. 2. Installation, operation, and maintenarice of the telephone system on all islands other than Eniwetok. 3. Provide and maintain point-to-point wire circuits in the intra-island and buoy sub- marine cable system to meet timing and telemetering requirements of the scientific programs and provide loaded and nonloaded circuits in these cables as required by Headquarters, JTF 132 to meet operational and administrative communications requirements, including telephone-trunking, teletype, and transmitter-keying lines. 4. Operation and maintenance of the ZI terminal of the Eniwetok— Los Alamos Ratt circuit. 5. Installation, operation, and maintenance, with the assistance of TG 132.2, of tactical radio equipment required for use by scientific contractors. 6. Instructions of TG 132.1 personnel in the proper use of communications facilities avail- able. 3.17.2 Organization The TG 132.1 Communications Officer, attached to the Plans and Operations Section of the Task Group, was assigned responsibility for the above-mentioned missions. Items 2, 3, and 4 are, in the main, covered by the Manager, Eniwetok Field Office, SFOO, as part of the normal Proving Grounds operation and maintenance. Additional facilities required to be furnished by the AEC, through H&N, were coordinated by a communicationsofficer attached to the AEC, SFOO, and to TU 11 of TG 132.1. H&N provided a radio-repair section consisting of a supervisor and three radio technicians and a telephone-operator section consisting of a supervisor and seven men. One cryptographic security officer and one enlisted assistant, attached to TG 132.1, were employed at the AEC Communications Facility, Los Alamos, to handle messages encrypted in military cryptographic channels. The AEC Communications Facility, Los Ala46 *