CHAPTER Il, SECTION 6 to handle ABMAtraffic and telephone and tele- type conferences with ABMA at Huntsville, Alabama. These telecons were conducted with unusual success, considering the transmission path over various military and commercial circuits and the fact that the information was on- line encrypted. H&N was delegated installation and opera- tion supervision for the comcenter that was created to process news agencytraffic in relation to the PINION event. The installation was made in Building 224 on Elmer with eight teletype machines and onefacsimile unit handling traffic. The circuits were connected through military transmitting facilities from Eniwetok to Honolulu and were terminated in Honolulu. Teletype traffic at Jobsite during the two peak months of HARDTACK totaled 24,312. This compares with a REDWING two-peakmonth total of 13,547. Overcrowded conditions in the Elmer Comcenter hampered operations to some degree, and the limited space did not permit a moreefficient arrangement of equipment. RESPONSIBILITIES AT JOHNSTON ISLAND. A telegraph circuit was established between Johnston Island and Elmer during the initial entry to handle traffic until the projected Military voice and teletype circuits were established in May 1958. Also, a harbor control station was installed for marine dispatch use. FM networks, similar to those described previously, were installed using VRC-18 equipment. Page 318 In mid-June a requirement was received to provide and install single side band high frequency transmitters and receivers for a count- down circuit, covering a 90° sector between Johnston Island and the Hawaiian Islands. Emergency procurement action was taken by the Los Angeles office and the equipment was purchased, inspected, air shipped, and placed in operation 10 days prior to the User’s deadline. A mobile interference detection unit was fabricated on a 114-ton truck bed and placed in service to protect diagnostic and communications circuits. Interference on frequencies up to 5000 megacycles was investigated and re- ported by the H&N detection team. MOTION PICTURE SERVICES. Concurrent with camp activation, H&N maintained six open-air motion picture theaters during the build-up and the operational phases of HARDTACK. Theaters at Elmer and Nan used arc projectors, while those at Yvonne, Janet, How, and Oboe used lamp projectors. All theaters had a free showing of a standard size or cinemascopic feature picture seven nights a week; also, indoor matinee movies were pro- vided for night workers. In addition, equipment and film were supplied to the George camp dur- ing its period of occupation, and to Scientific House Boats as required. The film was received from the Army and Air Force Motion Picture Services by special arrangement through the AEC.