radiological safety monitor equipped with suitable RADIAC equipment and a radex plot. This monitor shall be capable of calculat¥ng allowable exposures under both tactical and operational conditionq. (4) All persons in aircraft at shot time, or at subsequent] times when engaged in operations in or near the cloud or radex tradk, shall wear film badges. (5) Pilots and copilots of aircraft in the air at shot time shall use modified all-purpose 0.1 density filter goggles. Copilofs should, as an extra precaution, cover their eyes with forearm at zerd hour. e. In air and water the following continuous levels of radiodctivity are considered safe from the viewpoint of personnel drinking fand breathing: (uc - microcurie). Long-lived Alpha Beta or Gamma Emitter Water NOTE: Air 5 x lo74 uc/ce 107® uc/ec (at H+3 days) Emitters 107? uc/@€c 6 x 10712 uclec In air for any 24 hour period after a shot, 1074 uc/c particles less than 5 microns shall not exceed 107® uc/cc). 13. of which All radiological safety operations for Operation CASTLE will Sidered as routine and will comply with permissible radiolog posures for routine work, except "special operations" which Specifically designated by CJTF SEVEN. In tactical situatio military commander must make the decision regarding allowabl sures. As military personnel are normally subject to only r exposure, health hazards are at a minimum. Current Departme Defense information on exposure to gamma radiation in tactic tions is indicated below: a. Uniform acute (immediate) exposure of 50 roentgens to a Armed Forces personnel will not appreciably affect their ef a fighting unit. oup of ciency as b. Uniform acute exposure of 100 roentgens will produce in casional ill render individuals nausea and vomiting, but not to an extent that Armed Forces personnel ineffective as fighting units. Pers nel receiving an acute radiation exposure of 100 or more roentgen should be ssible. given a period of rest and individual evaluation as soon as c. Uniform acute exposure of approximately 150 roentgens or reater as troops within a few hours through a substantial incidence of nause , vomiting, weakness and prostration. Mortality produced by an acute e 150 roengtens will be very low and eventual recovery of phy ness may be expected. can be expected to render Armed Forces personnel ineffectiv da. Field commanders should, therefore, assume that if subst bers of the men receive acute radiation exposures substanti 444