look through the eyepiece; the total radiation dosereceived is read directly on the scale. After each use, thedosimeter is recharged and the indicator line set to zero.The nonself-reading category is a high-rangecasualty dosimeter (fig. 13-8). To determine the totalamount of gamma radiation the wearer has beenexposed to, it’s put in a special radiaccomputer-indicator. Its range is 0 to 600 roentgens.BIOLOGICAL AGENTSNo simple or rapid method can be used to detectBW contaminants. The only known method consists oftwo phases—a sampling phase conducted by a CBRsurvey team and a laboratory stage conducted bymedical personnel.Samples of material are taken from a wide area.Samples include air, surfaces of bulkheads and decks,clothing, equipment, water, food, or anything elsesuspected of being contaminated. Then the samples areshipped to a medical laboratory for identification of theagent.CHEMICAL AGENTSWarning of a CW attack based on detection by thephysical senses alone is not only dangerous but wouldprobably be too late. This is particularly true iffast-acting nerve agents were used. Special detectionequipment, such as the M256A1 vapor sample detectorkit and the M8 and M9 liquid chemical agent papers, isused to detect CW agents. Also, draeger tubes are usedto detect the presence of phosgene gas. Other pieces of13-16Student Notes:Figure 13-7.—Self-reading pocket dosimeter.Figure 13-8.—High-range casualty dosimeter, DT-60/PD.
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