Downloaded from https://www.everyspec.com SUMMARY of CHANGE AR 70–38 RESEARCH, DEVELOPMENT, TEST AND EVALUATION OF MATERIEL FOR EXTREME CLIMATIC CONDITIONS This Change 1-- o Is issued to correct printing errors of the basic. o Replaces old pages 2-19 and 2-20. This corresponds to electronic paras 2-8f through 2-11b. o This revision-- o Is a complete revision of AR 70-38. o Reflects changes in policy, guidance, and climatic criteria, and conforms to MIL-STD-210B, Climatic Extremes for Military Equipment, 15 December 1973.