text: Glossary
  principle
  (Army) A comprehensive and fundamental rule or an assumption of central importance that guides
  how an organization or function approaches and thinks about the conduct of operations. (ADP 1-01)
  procedural control
  (DOD) A method of airspace control which relies on a combination of previously agreed and
  promulgated orders and procedures. (JP 3-52)
  *resilience
  In air and missile defense, the quality of the defense to maintain continuity of operations regardless of
  changes in or unanticipated tactics by enemy air or losses of critical air and missile defense
  components.
  restricted operations zone
  (DOD) Airspace reserved for specific activities in which the operations of one or more airspace users
  is restricted. Also called ROZ. (JP 3-52)
  rules of engagement
  (DOD) Directives issued by competent military authority that delineate the circumstances and
  limitations under which United States forces will initiate and/or continue combat engagement with
  other forces encountered. Also called ROE. (JP 3-84)
  *secondary target line
  A pre-planned alternative target line used to shift the orientation of fires to assure all likely threat
  avenues of ingress are adequately defended.
  sector of fire
  (Army) That area assigned to a unit, a crew-served weapon, or an individual weapon within which it
  will engage targets as they appear in accordance with established engagement priorities. (FM 3-90-1)
  *short-range air defense
  Capabilities that provide air defense against low-altitude air threats. Also called SHORAD.
  *standoff range
  A range at which an air threat can surveil or attack an asset while staying beyond the engagement
  capability of a defending air and missile defense system.
  tactical control
  (DOD) The authority over forces that is limited to the detailed direction and control of movements or
  maneuvers within the operational area necessary to accomplish missions or tasks assigned. Also called
  TACON. (JP 1)
  *threat evaluation
  The process of determining the intended target of the threat, the threat’s predicted impact point upon
  the defended asset, and the timing of the threat’s arrival.
  troop leading procedures
  (Army) A dynamic process used by small-unit leaders to analyze a mission, develop a plan, and
  prepare for an operation. (ADP 5-0)
  unmanned aircraft system
  (DOD) That system whose components include the necessary equipment, network, and personnel to
  control an unmanned aircraft. Also called UAS. (JP 3-30)
  *upper tier
  A layer of airspace that encompasses very high altitudes within the atmosphere to outside the
  atmosphere, in which air and missile defense engagements are conducted.