1963 US Army Vietnam War Armor Operations ... - Survival Books

WWW.SURVIVALEBOOKS.COMAPPENDIX XXIIIPREDICTION OF FALLOUT AND CHEMICAL AND RADIOLOGICALMONITORING AND SURVEYSection I. FALLOUT PREDICTION1. General after onset of fallout). Major disruption ofunit operations is expected to occur in thisTwo methods of fallout prediction are availablefor use in the field, the detailed method and zone.the simplified method. The detailed method b. Zone 1, "Zone of Moderate Risk." Theinvolves the preparation of a fallout wind vec- general area in which exposed, unprotectedtor plot each time new meteorological data is personnel are expected to receive a total dosereceived (normally every 2 hours). Effective of not more than 100 rad when remaining inwind speed, wind direction, and width of the the area for not more than 4 hours after onsetpredicted zones are determined from the fall- of fallout. Troops in zone II may continueout wind vector plot. Effective wind speed and their missions without casualties for up to 4direction are transmitted to subordinate units hours after onset of fallout provided they haveto enable the commanders to make a simplified not been exposed to radiation previously.prediction. The simplified prediction affords c. Outside Zones I and II. No casualties arethe subordinate commands a direct and immedi- anticipated, outside these two areas and dosesately usable method to estimate the fallout are not expected to exceed 20 rad in the firsthazard with the least possible delay. Normally 6 hours after onset of fallout. The total dosethe detailed procedure will be used at echelonstehaving a meteorological having a meteorological capability and thefor an infinite stay outside zones I and II shouldsimplified procedure will be used at other not exceed 150 rad.echelons. The decision as to which procedure touse at various echelons is left to the commandersconcerned.2. PurposeBoth the detailed and the simplified predictionsproduce the same end product-a plot -e L ECTVE WI DRECTIof predicted zones that are expected to contain AZIUTH Odangerous fallout contamination (fig. 83).These zones are described as follows:a. Zone I, "Zone of Immediate OperationalConcern." The general area in which exposed,unprotected troops may receive casualty-producingdoses (greater than 100 rad) in relativelyshort periods of times (less than 4 hoursFigure 83. Fallout prediction plot.356 AGO 9139A