Ee 1.6.8 Drcinege chrractoristics as affected by the poriod and emplitude of roll, shecr, and canbor will have to be determined for the test ships to soc whether thoy are typical of conbatant ships. (soe Tab A~10), 2e Mission To determine the effectiveness of tho washdown systom in reducing factors which nay effect the gamna radiation hazard; to provide infor- mation so thet the degree of hazard may be determined, and so that the results of the experiment may be extrapolated to other types of Navel vessels in various tactical situetions of interest. The specific nissions of Problem 6.42 aro: 2.1 To determine the gamma rcdintion dosage rate and intograted dosc at various times et various comparable locations on the two test ships, 2e2 To utilize the above informetion to determine the effectivo= ness of the washdowmm in terms of: (a) the reduction in integrated gamma radiation dose; (b) the reduction in the gamma radiation ficld remaining on the ship's weathor surfaces, 2.3 To determine the uniformity of contaminant remaining on vorious surfacc matcrials ond configurations with respect to resh= dotin nozzle positions, 2.4 data by: To detcrmino the limitetions imposed upon the experincntal (a) the mcehanical performance of the washdown systen; (b) the ship's performance; sand (c) the atmosphoric conditions encountered during the 2,5 To determine the effect of the washdomm systom on subsc~ quent tretical and industrial decontemin-tion operation; (to be considored under Problem 6.4b).