Manual rather than automatic service vas selected because of its lower cost, smaller size of system, and slaplicity of maintenance, particularly in a remote area where skilled personnel were expected to be few. TELEPHONE SYSTEM In March 1949, consultations were held with the Chief Transmission Engineer of the Pacific Telephone and Telegraph Company, who volunteered the advice and assistance of company engineers in the design of the system especially with regard to submarine cable. It was decided that the design objective should be approximately 25 db effective transmission equivalent, in order to provide a service equivalent to that normal in commercial practice. Preliminary schematics of the telephone system disclosed that the overall maximum length of the trunking system would be approximately 40 miles. As a result of conferences with various cable mamfacturers and with Pacific Telephone and Telegraph Company engineers, it was decided that the most conven~ tional and economical type of cable for this application would be a dry core, paper~insulated, wire-armored, lead~covered telephone and telegraph cable containing 19~gauge pairs. In order to provide the design objective, an H88 loading system, obtained by placing 88&millihenry coils on approximately 6000-foot spacing in telephone trunking pairs, was specified. The effect of the introduction of these coils was to decrease the effective transmission loss from 1.51 to 0.43 db per mile and increase the de loop resistance from 85 to 92.9 ohms per mile. With losses in customers loops limited to 2-5 db, and allowing a loss of approximately 1 db at each switchboard, the system design thus fell within the established objective. Specifications for the required 713,000 feet of submarine telephone cable were prepared, bids were obtained and analyzed, and on August 30, 1949, it was recommended that the low bid by Graybar Electric Company be accepted. See Appendix F at the end of this report. Specifications for the required telephone switchboards and instruments were prepared. See Appendix F of this report. One Kellogg Masterbuilt Junior two-position switchboard was obtained for Eniwetok, and one for Parry. Each was wired and equipped for 220 common battery and 30 magneto lines and both were camplete with power equipment, main distributing frame, and testing equipment. One Kellogg Masterbuilt Junior single-position switchboard was obtained for Runit, Engebi, and Aomon, Each of the boards was wired and equipped for 45 common battery and § magneto lines and all were complete with power equipment, main distributing frame, and test set. Wall type instruments were Kellogg No. 11OOBA Masterphones, moisture and fungus proofed. Desk type instruments were Kellogg No. 1000, similarly treated. Field type instruments were Signal Corps Type EE~8A. Quantities of instruments required increased materially because of increased population and increased User requests, 5-238