Specific representations of the physical environment or environmental effects used by, or common to, many models and simulations; e.g., terrain, atmospheric, or hydrographic effects. [DoDD 5000.59; DIS; DODI 5000.XX;]
Umelo olungqalileyo lokusingqongileyo okuphathekayo okanye iimpembelelo zokusingqongileyo ezisetyenziswe, okanye ezikhoyo kwimimodeli ezininzi nakwimfaniso, umz. Umhlaba, i-atmosfera, okanye iimpembelelo zehayidrografikhi. [DoDD 5000.59; DIS; DODI 5000.XX;]