aviation effect on environment
вплив авіації на довкілля
вплив авіації на довкілля
contemporary operational environment / contemporary operating environment (COE)
operational environment (OE) (obsolete, see `operating environment`)
aviation impact on the global environment
air defense ground environment
Allied Joint Doctrine for Recovery of Personnel in a Hostile Environment (AJP-3.7)
common operating environment (COE)
Environment and Security Initiative (ENVSEC) UN-OSCE-NATO initiative