text: Chapter 4
  4-72. ADA units will normally be governed by a mix of positive and procedural controls that will vary by
  weapon system. For example, aircraft engagements by Patriot are typically positively controlled by
  engagement orders passed through voice and data links from the engagement authority, while those by
  Avenger may be positively controlled, but are, more commonly, procedurally controlled – initiated at the fire
  unit based on established identification criteria (visual identification) and weapons control status.