Also found in: Dictionary, Acronyms, Wikipedia. (OPerations SECurity) Determining what information is publicly available in the normal course of operations that can be used by a competitor or enemy to its advantage. OPSEC is a common military practice that is also applied to civilian projects such as the development of new products and technologies. The Official Definition.
What a short duration is, and how it exactly impacts MRE shelf life, is anyoneâs guess. Chilling MREs in the fridge undoubtedly extends the shelf life of MREs, however it is not specified by how much. Some sites selling MREs claim they last as long as 130 months (almost 11 years) at 60 F (15 C) .
1 On average, an MRE is going to cost anywhere from $6 to as much as $12. 2  MREs can either be sold individually or sold by the case. 3  For instance, this popular Sure-Pack MRE Full Meal Kit sold at Amazon sells for $13. 4  MREinfo.com said that the average cost of an MRE is around $45 to $60 per case. Aside from the military MREs, there are now civilian MREs. 2  They can commonly be found through someone in the military, surplus stores, gun shows and auction sites such as eBay. 3  The average lifespan of a MRE is about 7 years. 4  However, if it is exposed to high heat or extreme climates, this number can reduce a lot.