Figure 40. Tent for changing contaminated clothing at Parry, CASTLE. aircraft and four unmanned F4U aircraft used in Project 6.4 (Proof Testing of Atomic Weapons Ship Countermeasures) TASK GROUP 7.4 AIRCRAFT. also required decontamination. Decontamination of sampler aircraft used in CASTLE was required after each test shot. quired decontamination. Other aircraft occasionally re- Within TG 7.4, aircraft decontamination was a mission for the Aircraft Decontamination Section of the TAU which, during the buildup phase, had one officer and three airmen, two of whom had considerable experience from three previous operations (Reference 30). Procedures for decontamination operations underwent constant revision. from event to event as experience increased. TG 7.4 issued a new Annex N, dated 16 March 1954, which superseded the 26 February 1954 annex. The new annex required all units of TG 7.4 to furnish personnel for decontamination operations using revised procedures (Reference 31, Operation Order 2-54): From the experience gained following shot BRAVO in decon- tamination of assigned aircraft, it was apparent that the techniques and utilization of personnel must be revised. 154