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 The average case has 12-24 MREs. 2  After some general research, it has been found that anything around 24 pounds for less than $25 is a fair deal. 3  According to SurvivalAcres.com, a case that contains 12 meals should cost around $50 while individual meals should average around $4 to $7 per meal when bought in bulk. 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.