A system to allow dry run tests of shot barge equipment at the Parry barge. slip would allow still further acceleration of the shot schedules without decreasing the reliability of the firing system. Separation of the LASL and Livermore laboratory efforts on two atolls made possible better coordination of the work at each site and should be retained in the future if possible. In order to maintain morale and improve coordination with the home laboratorf, it is desirable to rotate people between field and the ZI more frequently. This is especially important if it is desired to maintain the capacity to add new devices to the shot schedule during the operation. 4.2 TASK UNIT 2, UCRL PROGRAMS Task Unit 2 was organized to field UCRL-designed weapons and nuclear devices and to carry out diagnostic experiments designed to measure certain of their properties. The techniques used to obtain the various measurements are outlined briefly in Sec. 2.3. They are also described in greater detail in the preoperational and technica! reports of the various programs. The concept of UCRL and LASL limiting their activities to separate atolls was introduced for the first time in Hardtack. It proved to be a very satisfactory arrangement for the major portion of the operation, although a combination of factors resulted in the necessity of shifting several UCRL shots to Eniwetok during the latter stages of the program. Chief among the factors requiring UCRL to shift devices to Eniwetok was the tight production schedules encountered in the fabrication of devices and the inherently poorer shooting weather encountered at Bikini when compared to Eniwetok. Much of the diagnostic support required at Eniwetok was provided by EG&G; without this support the two-atoll operation would not have been possible. The operation was very successful on all counts. It is recommended that the policy of concentrating an individual laboratory's major effort on one atoll should be continued. Multiple shot sites should be prepared at each atoll. This makes it possible to fire several devices during a short period of favorable weather. A small number of the support craft should be equipped with radios which would permit personnel aboard to communicate directly with their Task Unit headquarters. This could be limited to one LCM, LCU, and helicopter. Teletype and telephone service cleared through Secret Restricted Data should be available to any complex or island on the atoll that is the site of a major camp. Each shot within an atoll should have a completely independent timing and firing system, making it possible to dry run one device while another is in a ready state. The Task Unit Commander should have direct communications from the CP to the sample control aircraft at all times. 4.3 TASK UNIT 3, DOD PROGRAMS Task Unit 3 was activated in the EPG on March 15, 1958, and was or- ganized to conduct approved weapon effects tests under the operational control of CTG 7.1 and the technical direction of the Chief, Armed Forces Special Weapons Project. Since activities involved vast areas of the Pacific region, 119