CHAPTER I OPERATIONAL PROCEDURES 1. The measurement of the ratio of the fission yield to total yield will require several distinct operations. This handbook provides the basis for a division of labor which the Observers may find suitable. The demonstration and discussion of the measurement techniques at Berkeley will also provide a further basis for selecting different tasks for small groups of Observers. 2. The first contact between the Observers and the Pinon Test Offi- cials will take place in Berkeley. Several days will be devoted to briefing the Observers on the measurement techniques. A thorough demonstration of the high-speed camera used to photograph the fireball will be given. The method of operating the comparator which measures the fireball 1mage on the photographic film will be explained. An actual chemical analysis of radioactive materials will be done in order to make clear the method of determining the fission yield of the bomb. 3. At the end of the briefing sessions in Berkeley, the Observers will be transported by aircraft to Honolulu. Ata time dependent on the comple- tion of the regular test series at Eniwetok Atoll, the Observers will be trans- ported by military aircraft to the Test Site at Eniwetok. The program at Eniwetok will deal only with those facilities that are required for staging the explosion, for measuring the fireball, and for obtaining radio-chemical samples. The device will be detonated on a barge moored in the lagoon on. the northern side of Eniwetok Atoll. The fireball photographs will be made with cameras mounted on a 300-foot tower on Parry Island. The radio- chemical samples will be collected on filters carried by aircraft through the cloud resulting from the explosion. 4 The Observers may freely inspect the barge containing the bomb and the site on which the barge will be located. will be_weighed, The container with the bomb The Observers will note that the tracer consists of U,0,e | Wy OS ON es eer BOE @@_-__.: | {The Observers may have free access to the barge until the time for detonation. Security measures prevent the inspection of any part of the device inside its container. For the same reasons the Observers will not be given a sample of the radiochemical tracer. CP em tt docueu a \y \e