f r&ulted in amendments and additions to the operation order, 23, 2h and 25.) General requirements for cloud sampling were documented by the laboratory concerned - in this case, the Los Alamos Scientific Laboratory - and given to the Sampling Element. Prior to the mission, any changes were dis- cussed in conference between the Sampling Element Commander and the scientific representative of the laboratory, At this time, final sampling requirements were established. The crowded conditions on the runways and taxiways at Eniwetok made the preparation of a written Mission Execution Chart necessary. was published on D minus two (2) days by the Test Aircraft Unit. This chart This chart established start engines, taxi, run-up, take-off and approximate landing times for the participating aircraft. See Figure 26 for the ROSE Mission Execution Chart, On D minus one (1) day, a general briefing was given by the Test Air. craft Unit to all aircrews, air controllers, tower officer and other responsible agencies, briefing were given, Shot location, time hack, H-Hour time and a weather Also a review of the operation order, a "blacklitel display of the H-Hour aircraft patterns were shown and special requirements and instruction were given. Following the general briefing, each partici- pating element conducted its own specialized briefing, going into much greater detail on their specific mission requirements. 1L6 APWL/HO