tion by about noon on BRaVO plus one day. Use of the WB=29 es a Low level aerial monitor cn the afternoon of shot days, as described above, wis cne of the pést-BRAVO changes in the Radsefe Plan to improve the early f2ll-cut warning capability of the task force. among other measures, 4lso taken, was the instellstion of a direct CW link between the WB-29 airercft an. the Rad~ safe OFFICE in order that more positive and rapid radsafe control of the aim craft flight ¢ould be assured. - 7 (d) although the capability of WB=29 covorege was naintained for the pericd of H to H plus 48 hours, only the first 2h-hour periol was use on all shots. This was duc tc the fact thet intensitics encountcr-< as l-te as H plus 24 hours wero in no instances significant ard to the fact thet the crews on normal woather reconnaissance flights (usually two separate flights) on D plus 1 dsy wore instructed to meke half-nourly radiation reports, «sa econsequones, cloud tracking coverage was maintained normlly by two “B-29's flying from H plus 2 hours to about H plus 14 hours (i.¢., the special low level racetrack and sector seareh, Plight #1 of Tab E), one ‘/B-29 flying froz H plus 12 to H plus 24 hours (Flight #2 of Tab £), two WB-29's flying regula: weathor recormaissance flights and rcporting radistion encountered on D plus 1 day, and NYROPO Flight ABLE flown on 0 plus 1 dsy. (e} THe original plin for rediation reporting providec fcr the cloud trackers tdgive reedings in block values (i.e., 0-10 ar/hr, 10-50 orfhar, 50-100 mrf/ar, ete.). This was revised by a change in the reporting procedure to report the exact reading in mr/hr within the reporting dlock value given. another change was made tc indicate the type instrument uscd ¢ make the reading, .« further chango provided for rosdings to be reportcc 3s gross values with no attempt made by the aireraft crow to subtract aireraft