and that the Eniwetok Atoll should continue to be used. On 20 April 1949 the Commission approved the recommendations submitted for an operation plan and construction program, and it thus became possible to define the scope of the work to be carried out by the contractor. The plan approved by the Commission provides for tests to be conducted in 1951 as well as one additional test operation. The definitive contract between the AEC and Holmes and Narver was for- mally approved by the middle of June 199. OPERATIONAL PLAN: an a generalway, it is planned that the scientific tests shall be conducted as a shore based operation. This implies that all persons involved in the operation, in so far as is practical, shall be quartered either on the shot islands or the headquarter islands of Eniwetok and Parry. One exception to the above arrangement is currently seen to be the bomb assembly operation, and this will be carried out aboard a ship of the USS Curtis, AV-l, type. Specifically, the scientific requirements for the tests are enumerated below, and it is from these requirements and the recommendations contained in the 7 January 1949 Holmes and Narver Survey Report that the construction program has been formulated. (a) Detonation Sites. It is planned to detonate three weapons on 3X0-foot Towers in the spring of 1951, on a 15 day schedule. The sites chosen, in order of detonation, are Ingebi, Aoman and Runit. (>) Photographic Station Sites. Two photographic sites, one approximately 2 miles north and one approximately 2 miles south of each of the shot towers will be required. In addition to the land photography, certain aerial