Command and AdministrativeNet system from Los Alamos. On 2 December 1947 Dr. Froman submitted a request to the Manager, Sante Fe Directed Operations,that the Los Alamos Tsletype Center remain open twentyfour (24) hours a day effective 1 March 1948 until completion of the operation. The teletype routing indicatorsto be used for Atomic lhergy Commissionmessages were coordinatedwith the Armed Forces and promulgatedto the Atomic Energy Commission installationson 16 “ February 1948. The Technical Net consisting of SCR-608fs installed at important stationswithin the task force was, until 28 October 1947, planned to be the primary intra-taskforce voice communicationsystem. The decision to install AN/TRC-l radio telephone equipnent on the three main ships reduced the Technical Net to a ‘back-up!!status. The communicationrequirementsof the photographicgroupwere obtained from Colonel Cullen on 5 November 1947, and it was decided that communications to the photo towers could best be supplied by their inclusion in this net. The final plan for the Technical Net called for the followi@ stations: (1) AV-4; (2) AV-5; (3) AGC-7; (4) cvwl15; ; (5) LSb!?-2!ll (6) LSM-378; (7) Boat Pool Base (MD-19); (f!)LCM (6) Tank Control Boat; 43 Section XI