Research, Development, Test and Evaluation of Materiel for Extreme Climatic Conditions — AR 70-38

This regulation prescribes policies, responsibilities, and planning guidance for realistic consideration of climatic conditions in the research, development, test, and evaluation (RDTE) of material used in combat by the Army. This regulation is concerned primarily with the mechanical operation or functioning of materiel under the extremes of climate to which it is likely to be exposed. It is recognized that some environmental elements or conditions (smoke, haze, fog, shimmer, and clouds, for example) may affect the ability of some materiel, particularly electro-optical equipment, to perform its mission. Unfortunately, the effects of these environmental factors on the operation of electro-optical devices cannot be reliably quantified at this time. Therefore, design criteria for visibility requirements are not given in this regulation.