—e ef —_—- - 100 to 500 mr/hr, radiation levels in the area are higher tut on fringe and taking observations at lower radiation levels, cloud is visible, working leading cdge of cloud, dumy, dummy, readings fluctuating, iadsafo mission progressing satisfactorily, dummy, plus two dummy five-digit groups." 2. Post BRAVO medification of above: = & Reference paragraph 1 above, and in order to riport actual values of the intensity reading instcad of the blockevalues given by the second digit, a change was made whereby the successive digits of the first available dummy five digit group was used to indicate tho specific valuc of the reading within the blockevalue given. Thus, [ff the block-value were 500 = 1000 mr/hr, followed by the group 75022, the true reading would be 750 ar/hr. This change also made use of tho last t of the group to indicate the type of instrument used, 1.6., 1 for aN/PO%T13 and 2 for Seintameter, 75022 thereforw would completely designate a reading of 750 or/hr by scintametor, be oferones paragraph 1 above, the second digit was desimed to indicate intensity readings abowe estimated background, ‘This was changed to indicate groes roadings in order that tho true intensity of exposuro on the aircraft crew could be assessed. in the interest of floxibility in the reporting procedury provision was made for the aircraft crew to report estinatod aircraft background vy using the first digit to indicate "no dotectable radiation abowe background,” the second digit to indicate the blockevalue of the estinated background reading and the successive digits of the next five digit group to indicate the actual intensity reading in or/hr in accordance with paragraph 2a above, @en Inclogre 4& -.