Surface Radex. True bearings from ground zero 240° Clockwise to 50°; radial distance of 90 nmi (167 km) for H-hour to H+6, plus a circular radex around ground zero of 25 nmi (46 km) radius. It was recommended th the air control DDE (the USS Renshaw) move to a true bearing of 250° 90 nmi (167 km) from ground zero. to about 4 000 ground zero, maximum distance 20 nmi (6.1 km}; 40,000 eet ground zero, maximum distance 35 nmi (65 km). Air Radex. For H+l, 10,000 feet (3.05 km) feet (12.19 km), 2809 clockwise to 75° bearings from (12.19 km) and up: 270° clockwise to 90° bearings fr multiply distances by six (210 nmi (389 km]). For H+6 On Enewetak, TG 7.2 radsafe officers were briefed, film ba ges issued, and couriers instructed on monitoring duties. Plans were made to muster all TG 7.2 personnel on the ocean side of Enewetak Island. Th abled the personnel to witness the detonation at Bikini Atoll muster ennd served as a rehearsal for the type of muster to be performed if an ev cuation were required. The P2V patrol squadron assigned to TG 7.3 and stationed a | Kwajalein was directed to assume CASTLE radsafe monitor responsibilities for Kwajalein from H-hour to H+24 and to reportradiation intensities i excess of 0.01 R/hr to the task force headquarters by Operational Immedi te prece- dence. At Wake Island, TG 7.4 was directed to set up a specia! monitor station for the period H-hour to H+36. At the 1800 command briefing the observed and forecast win« patterns were completely favorable and the decision to shoot the follow was confirmed. At approximately 2300, a directive was passed g morning CTG 7.4 on the cloud-tracking flights for the first 12-hour period on ot day. Two WB-29 cloud trackers were to operate in a racetrack holdin pattern 50 nmi he other (93 km) west of ground zero, one at 10,000 feet (3.05 km), at approximately 5,000 feet (1.52 km). The directive specifie a flight by Wilson 2 from H+2 to H+l4 from base to a 3~-hour holding pat rn at 10,000 feet (3.05 km), and thence to a 500-nmi (926-km) radius ector with true bearings from ground zero of 60° and 90° at 10,000 feet ( 05 km). 253 26/