CHAPTER Il, SECTION 7 ions, which by the very nature of this type of work are hazardous. This also resulted in economyof instatlation, testing and maintenance. For the foregoing reasons new submarine cables for OPERATION CASTLE were ‘aid in shallow Waters. For OPERATION GREENHOUSE some cables from OPERATION SANDSTONE were utilized and for OPERATION IVYboth SANDSTONE and GREENHOUSE cables were utilized. In a sense the submarine cable svstem at Emwetok Atoll “grew from a system ortvinating with OPERATION SANDSTONE and resulted in providing for separate cables for telephone andsignal or control circuits. In planning for OPERATION CASTLE at Bikini it was decided to provide for both telephone and signal or control circuits in one cable svstem. This required special splice boxes to provide inductive loading coils for the lines used for telephone trunking. However, the use of one cable for the combined circuits permitted a reduction of approximately 406 in cable requirements. The saving in cost of installation was directly proportional used. te the reduction in iength of cable At the request of the Manager, Eniwetok Field Office on 4+ February 1953, inquiries were made as to the cost and delivery dates for 90 miles of 16 pair or 43 miles of 32 pair submarine cable. A review of the replies of the cable manufacturers indicated that a double system of 16 pair would cost JGmore than a single system of 32 pair, but that the delivery of the 16 pair cable could be made in time to assure completron within the desired schedule, whereas delivery of the 42 pair cable would be such as to delay the completion date. In addition, by using two cables of 16 pair ia heu of one of 32 pair cable more reliable “back up" circuits could be provided, as a break in a 32 pair cable in all probability would affect all 32 pair wires. This would also arect long term maintenance. In view of the foregoing reasons the Contractor recommended to the Manager, Enivetok Field Office the use of the two systems of 16 pair cable in lieu of one of 32 pair cable. The specifications prepared and approved for the system in March 1953 permitted the use of plastic insulated and jacketed cable as well as the conventional and more expensive bei el ee OPER Figure 2-225. Ma ae eb ie at Subrarine Terminal Station 3.3. Typical Page 2-227