CHAPTER fl, SECTION 7 Station 90 when this Station was moored in the Station 20 crater. This was caused by excessive pull of the cable on the terminal connections. The cable was originally laid in the form of a catenaryfrom the lagoon bottom to the barge terminal. Due to the heavy seas prevailing there was some movement of the barge and a shifting of the crater bottom causing a tightening of the catenary with the resultant excessive strain on the terminal connections. This condition was rectified by re-laying the cable with sufficient length so that it laid entirely on the bottom from the terminal on shore to directly under the barge, at which point considerable slack was provided. Cable basket clamps were then used to secure the cable to the barge and thereby relieve the strain from the terminal connections. Men Laying Submarine Cables on Reefs Figure 2-229. ally laid in shallow water instead of deep water. (2) Single systems were used for telephone and signal or control instead of the dual systems used formerly. (3) Concrete terminal housing was provided for protective purposes. Figure 2-230 notes typical Station completed with earth The submarine cable for Station 30 was laid to its approximate terminal location in the lagoon and buoved prior to the BRAVO event, as Station 30 was scheduled to be used after this event. But due to the unexpected results of the BRAVO detonation the ROMEO test (Station 90} was next fired in the Charlie crater, As a result of this detonation the buny marking Station 30 cable sank and the cable was considerably damaged. It was necessary to renew approximately 6,000 feet of this cable to prepare Statien 30 for use. ENIWETOK ATOLL emeeen.zay.-. . - . .”eee ed that aca result of the MIKE. detonation of the Fi “acim Figure 2-200. A dual interisland cable system for telephone and signal or control circuits had been laid for previous test Operations in Eniwetok Atoll and it was necessary oniy to adapt these systems to the nceds of OPERATION CASTLE. Routine testing of these cables had revealed 5S. T. Station - Completed Typical covering. (4) Plastic insulated and jacketed cable was used in addition to lead armored cable. (5) The mechanics of laying cable were simplified by use of a specially fitted cable-laying boat. Difficulty was experienced in failure of the submarine signal cable terminal connection on IVY OPERATION the cables leading westward from Janet to Gene and from Janet to Alice were damaged. However, there was sufficient usable cable. both telephone and signal, in the Janet - Gene line to permit re-routing this line from Janet to irene as required for CASTLE OPERATION. The line to site Alice Was terouted to site Belle. To accomplish this it was necessary to splice in approximately 1000 feet of cable to replace the damaged portion. At sites Irene and Mary terminal housing in concrete vaults was provided which was similar to that used for the Bikini installation. This provided protection against blast effects and a means of ready access for all terminals except the one on site Belle which was considered cxpendable. The telephone submarine cable system and the signal and control systems at Eniwetok Atoll as modified for OPERATION CASTLE are indicated in Figure 2-228 and Figure 4-13 (Chapter 1V) respectively. a] i i ' | ' J 4! | : i Soro nee ern Page 2-233 PY St tn eee ae ee