bunker allocated to TG 7.2 was inadequate for the installation of equipment. The HF transmitting equipment was ultimately moved into another station which also housed the TG 7.4 low frequency (LF) homing beacon and Radar Beacon (RACON) equipment. Certain inade- quacies in the antenna system at Enyu also arose but wers corrected by changing, relocating, and installing new antenna feeders, Since the unexpected effects of the first shot prevented the resumption of land-based communications operation at Bikini, the decision was made to continue operations from afloat. This move required that all the major ships of TG 7.3 remain at Bikini to provide communications and logistical support. Salvageable communi- cations equipment from the sites at Bikini was removed and evacuated to Eniwetok. Equipment required for timing, firing, voice time broad- cast, and TG 7,1 voice circuit to Eniwetok, was left installed in the bunker on Enyu. During this phase following the first detonation, a major com~ munications problem was generated by the establizhment of four sep- arate headquarters (JTF SEVEN, TG 7.1, TG 7.4, and TG 7.5) aboard the USS ESTES. The concentration of staff personnel on board the command ship increased the workload on the communication circuits and resulted in interference problems not normally encountered, Operational difficulties were increased and ordinary maintenance was affected for it was difficult to arrange periods when radio equipment could be silenced in order to perform this work. Several frequencies were changed and equipment closely monitored and attended to insure a minimum interference to operations. 24, For future