erences for the designated flight legs and transferred this information to the working flight l._ The Task Group 7.3 Air Operations Officer reviewed the legs for flight safety, and the inforin. tion was relayed to the appropriate aircraft by the radio operator. D-day flights used one aircraft, with a second aircraft on standby. The flights were limited to the upwind areas until active fallout had ceased. Surface ship reports, received by the Pro}TABLE 2.1 Shot SUMMARY OF PROJECT OPERATIONS Date Time Location Aerial Survey Cherokee 21 May 0551M Bikini D-day D+1 Zuni 28 May 0566M Bikini D-day D+1 Altitude Absorption D+2 D+3 Seminole 6 June 1255M Eniwetok Flathead 12 June 0626M Bikini D-day D-day D+1 D+2 Mohawk 3 July 0606M Eniwetok Navajo llJuly 0556M Bikini D+l D+2 D-3* D-2* D~day D+l1 D+2 D+3 Tewa 2i July 0546M Bikini D-1* D-day D+1 D+2 D+3 D+4 * Preshot surveys of lagoon water outside the Bikini Atoll. ect 2.63 repr: seatatives in the Control Center, indicated when fallout had stopped in the close-in downwind sector. The aircraft was then controlled through the area to limits described by the Ship reports. The D~day flights delineated the upwind boundary and obtained some intensity readings inthe radioactive area immediately downwind of ground zero. Two aircraft were used onD+1. One delineated the close-in radioactive area and confirmed the upwind boundary located on the previous day. The second aircraft flew an extensive search pattern to locate the edges of the contaminated area. The D + 2 survey re-examined the overall contaminated area. One aircraft was usually sufficient. However, the Tewa pattern was so large that two aircraft were needed. Flights on subsequent days used one aircraft and tracked the area until the dose rates became too low for adequate delineation. Survey data which delineated the outer boundary and points of interest in the fallout pattern were plotted in the control center to guide the Project 2.62 surface Ships with their oceanographic surveys During the period prior to the next shot, each aircraft was scheduled to spend a day on Site Fred for instrument calibration and service. Two technicians calibrated each radiation detector at Kwajalein prior to and immediately following each survey flight and returned the Top Hat detectors to Site Elmer between shots, where a complete routine battery change and recalibration was performed. 17