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 Proj- “Aan, D-day De+1 ’ D+2 D+3 Eniwetok Flathead , 12 June 0626M Mobawk July O606M Navajo OS56M llJuly Bikini D-day “ D-day Del D+2 Eniwetok Del Bikini D-3* : Dp- 2° D+2 D-day . Dei ~ Tews . D+2 D¢e3 " 21 July 0846M Bikin! Dp-1* D-day Dei us D¢+2 . De3 D+4 ® Presbot surveys of Jagoon water outside the Bikini Atoll. ect 2.63 representatives in the Control Center, indicated when fallout had stopped in the close-in downwind sector. Theaircraft 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 In the radioactive area immediately downwind of ground zero. Two aircraft were used on D+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 sufficleat. 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. . ap? re “ . . 37 . aes eT + ee oem yom 1255M Ne cSeR Om Meats AN mY a A eG ee or RET ee eo ee C6dune 1 Seminole ae ART MR OHA Dae BdeSionPO Bikini O566M , y P rN it 28 May . ae Ae Zuni Del i D-day : ta! Bikini * 21 May O551M Tae Cherokee Altitude Absorption t Aerial Survey Pe Location ie Hh Time beeae Dete Cenk cd Shot te Bren EB - + TABLE 2.1 SUMMARY OF PROJECT OPERATIONS _ at’ Wide Mi de eae ned tat tery ve The Task Group 7.3 Air Operations Officer reviewed the legs for flight safety, and the informa- ere wn wees + ee erences for the designated Night legs and transferred this information to the working flight log.