—46.8 sec —2.5 sec —5.0 sec —2.5 sec 0 Test +12 sec, cutoff —4070sec -15.0 sec t : -1.5 sec —-1.0 sec —1.0 sec 0 Test, +12 sec, cutoff The timing system provided by TU-6 proved, on the whole, to be both reliable and satisfactory. Approximately 150 hardwire timing signals were delivered on both the Teak and Orange events, and 14 radio tone signals were delivered to the two RB~-36's. 4.6 TASK UNIT 6, RADIOLOGICAL SAFETY The mission of TU-6 was as follows: 1. Perform all ground and aerial monitoring services associated with the scientific mission except those in conjunction with aircraft and airborne collection of scientific data; assist TG 7.5 rad-safe organization during the operational phase. 2. 3. Provide laboratory and technical assistance to all task groups. Provide all official dosimetry services for JTF-7. 4. Maintain and issue monitoring instruments and protective clothing as required. 5. Provide decontamination facilities for personnel, vehicles and equip~ ment. The necessity of maintaining a capability for firing at both Bikini and Eniwetok Atolls at the same time required that TU-6 provide two complete and independent rad-safe organizations. Over-all control over the two: or- ganizations was maintained by CTU-6. In addition, full rad-safe support was provided for the operations conducted at Johnston Island. Each organization contained the following sections: 1. Monitoring section for providing all monitoring services and man- ning checkpoints. 2. Plotting and briefing section for conducting all aerial surveys and briefing all personnel going into radiological exclusion areas. 3. Supply section for maintenance of rad-safe supplies, including laundry (facilities furnished by TG 7.5). 4. Instrument repair section for maintenance of rad-safe instruments. 5. Laboratory section for determining the amount of activity contained in soil, water and urine samples. 6. Decontamination section for operating facilities for personnel and 7. Photodosimetry section for providing personnel dosage information. equipment decontamination. Control over the official dosimetry and records was maintained direct- ly by CTU-6. All personnel in JTF 7 were issued film badges. Badges were exchanged after missions in radex areas; periodic exchange was effected at 60-day intervals. Badges were processed by photodosimetry sections located on both Bikini and Eniwetok Atolls, and complete current dosage record files were maintained on a daily basis. A master record file for all personnel in JTF 7 was maintained at Eniwetok. 126