1966 US Army Vietnam War ARMOR ... - Survival Books

WWW.SURVIVALEBOOKS.COMAPPENDIX XXIIPREDICTION OF FALLOUT, CHEMICAL DETECTION AND IDENTIFICATION,AND RADIOLOGICAL MONITORING AND SURVEYSection I. FALLOUT PREDICTION1. GeneralTwo methods of fallout prediction are avail- ' ' ="' 1":able for use in the field, the detailed methodand the simplified method. The detailed methodinvolves the preparation of a fallout wind vec- :tor plot each time new meteorological data is AYreceived (normally every two hours). Effective ! /B o cwind speed, wind direction, and width of thepredicted zones are determined from the falloutwind vector plot. Effective wind speed anddirection are transmitted to subordinate unitsto enable the commanders to make a simplifiedprediction. The simplified prediction affordsthe subordinate commands a direct and immediatelyusable method to estimate the falloutFigure 99. Fallout prediction plot.hazard with the least possible delay. Normally hours after onset of fallout). Major disruptionthe detailed procedure will be used at echelons of unit operations is expected to occur in thishaving a meteorological capability and the zonsimplified procedure will be used at other echelons.The decision as to which procedure to use b. Zone II, "Zone- of Moderate Risk." Theat various echelons is left to the commanders general area in which exposed, unprotectedconcerned. See FM 3-12 for a detailed discus- personnel are expected to receive a total dosesion of these procedures.of not more than 100 rad when remaining in2. Purposethe area for not more than four hours afteronset of fallout. Troops in zone II may con-Both the detailed and the simplified predic- tinue their missions without casualties for uptions produce the same end product-a plot of to four hours after onset of fallout providedpredicted zones that are expected to contain they have not been exposed to radiation predangerousfallout contamination (fig. 99). viously.These zones are described as follows:c. Outside Zones I and II. No casualties area. Zone I, "Zone of Immediate Operational anticipated outside these two areas and dosesConcern." The general area in which exposed, are not expected to exceed 20 rad in the firstunprotected troops may receive casualty-pro- six hours after onset of fallout. The total doseducing doses (greater than 100 rad) in rela- for an infinite stay outside zones I and IItively short periods of times (less than four should not exceed 150 rad.397