AR 70-38 governs environmental design, testing, and performance requirements for Army materiel intended for worldwide operation.
View AR 70-38 on armypubs.army.mil
It covers climatic design types, global operational environments, and atmospheric, terrain, and biological factors affecting military equipment. It requires environmental conditions to be considered in capability requirements, acquisition specifications, testing, and materiel design.
Capability requirements documents and the OMS/MP will identify operating, transport, and storage quantitative testable metrics defining qualitative operational conditions.
Prior to testing in natural environments, materiel developers plan for simulated environmental testing in climatic chambers unless impractical.
Test results from climatic chambers cannot be interpreted as a total substitute for tests conducted in the natural environment because they do not provide the synergisms associated with the natural environment.
Potentially dangerous items (for example, ammunition) will be designed to operate safely in all OEs worldwide plus meet ammunition specific requirements and applicable standardization agreements regardless of the likelihood that the munition will be used in any specific environment.