quantity recommended as a reserve for emergencies Total required 61,000 feet 251,000 feet On July 19, 1950, two preliminary copies of a schematic diagram of control and signal submarine cable were submitted to the AEC for approval prior to release to the field. warded to the Jobsite. On July 26, 1950, these drawings were for- In addition to the above requirements it was estimated that 27,300 feet of type 115-P cable were required for trunking from Bogallua to Bogombogo, Engebi to Muzin, and Muzin to Kirinian; and 38,850 feet for extensions from Stations 6a to Stations 69 on Runit, the Aomon Group, and Engebi. Deducting the 20,000 feet still available at the Jobsite, 46,150 additional feet were required, Procurement was authorized for 50,000 feet on August 3, 1950. This additional cable was installed, along with the stored cable; and, in addition, it was necessary to use a few pairs of telephone submarine trunk cables for control and signal circuits. Table 5.181 shows the location, type, quantity, and origin of all cable used. Figure 5.181 shows the complete schematic for the inter-island control and signal system installation, and Figure 5.18-2 shows the plan for the interisland control and signal system. The problems involved in installing the additional submarine control and signal cable for trunking purposes were similar to those for submarine telephone cable except that it was not necessary to use splice cases, For a discussion of the planning of this work, see Chapter 5.17 of this volume, Cable landings were protected in the same manner as the telephone cable landings and new cable terminal strips and terminal boxes were in- stalled in Building 311, Parry; in Station 69 on Runit, the Aomon Group, and. Engebi; and in Station 101 on Bogallua, Muzin, and Kirinian. LOCAL BRANCH CIRCUIT CABLE At the time of the Reconnaissance Report and Supplement No. 1, the assumed scope of local branch circuit cable work consisted of the installation of 34,400 feet of existing cable for distributing signals to the experiment island towers. On February 7, 1950, because specific require- ments had not been established, the Engineering Division asked for infor-~ mation concerning these requirements, On March 10, H & N was requested to make an investigation and submit recommendations as to the most economical wire to be used in large quantities for direct burial in trenches for control and signal use. It was indicated that because of the short-term usage, rubber or thermoplastic building wire (which had proved to be satisfactory for similar use on the previous operation) or nonmetallic sheathed cable would be suitable. These recommendations were submitted on March 31, 1950. Because of the 5-247