These radio transmitter-receivera were not sufficient to provide adequate communication facilities for the boat pool operations at the time noted. In addition, at the same time, consideration was being given to the type of radio equipment to be used as the back-up for wire telephone comminications. After thorough investigation of the availability of military-type equipment and spare parts for maintenance purposes, it was decided that standard commercial equipment might provide the solution to both of these radio communication problems. However, further consultation with the Communications Officer of JTIF-3 revealed that the Task Force was in a position to supply and maintain standard tactical-type military radio transmitters and receivers as required for H & N operational purposes such as boat pool working parties and, in addition, could provide a mobile unit incorporating AN/TRC equipment as a wire telephone back-up, The mobile unit mentioned could, in the event of complete cable failure by the trunking sta-~tions, be moved to the switchboard location beyond the failure and plugged directly into the telephone switchboard and would be tied into the AN/TRC equipment which JTF~3 planned to install in headquarters building No, 15 on Eniwetok and Headquarters Building No, 221 on Farry. Technicians and maintenance supplies for all of the equipment thus offered would be provided by JTF~3. In view of the "out of pocket" savings to be realized in following such a plan, the offer was accepted and no further design work on the part of H & N on the radio systems was involved. SCR-608 units were installed in the marine office, the radio shop, and aboard tugs, water taxis, and other craft operated by H & N within the lagoon. The AM~TRC mobile unit was present at the Atoll during the operational phase. PUBLIC ADDRESS SYSTEMS In accordance with initial recommendations, an outside paging system was provided for each of the experiment islands. The public address network had its origin at Station 69, the reinforced concrete, blastproof commnications and timing station, and provided paging services to the camp area and the areas in which scientific stations were located, including the zero point and others. The equipment used was manufactured by RCA and was designed to withstand tropi- cal conditions. The control console at Station 69 was adjacent to the mic microphone, Power amplifiers and loud speakers were installed on telephone switchboard so that the telephone operator on duty could page personnel at any of the four remote locations of the system. Each location was complete with relay, power supply, preamplifier, and dynapoles. INTER COMMUNICATION SYSTEMS On November 27, 1950, H & N was directed to procure am install 9 All-Master System intercomminication units, each with loudspeaker and earphone, equivalent to RCA MI-12596-2A and 7 sound-powered tele- phones for operational use by JTF-3 and T.G.3.1. Desired locations on Parry Island were indicated for 7 intercan units and 5 sound-power- ed phones including Buildings 311, 209, 221 (Headquarters JTF-3), 324, 208 and the boat dispatcher's shack, 5-244