text: Appendix B
  Airspace Coordinating Measures
  This appendix discusses airspace coordinating measures. First, it discusses the
  overview. Then, it discusses the types and usages of airspace coordinating measures.
  Lastly, this appendix discusses common reference systems for airspace coordinating
  measures.
  OVERVIEW
  B-1. Army commanders use airspace coordinating measures (ACMs) to facilitate the efficient use of
  airspace and simultaneously provide safeguards for friendly forces. The Army’s airspace control
  methodology emphasizes procedural control of airspace. ACMs are organized into a set of seven broad
  categories called types. The seven categories are: airspace coordinating measures, fire support coordination
  measures, maneuver control measures, air reference measures, air defense measures, marine defense
  measures, and air traffic control measures. Each type includes a subset of control measures called usages.
  B-2. Doctrinal ACMs are implemented by digital messages—United States message text format (USMTF)
  standard. See appendix D for USMTF details.
  B-3. Ideally, the airspace staff plans and requests ACMs prior to the publication of the current ACO. Once
  a commander approves ACMs, they are then added to the UAP for addition to the daily ACO. This does not
  preclude a component from immediately establishing and executing an ACM after considering risk. See
  appendix A for a discussion of the risk associated with ACMs. However, near-real-time airspace coordination
  requirements dictate that some ACMs be requested outside the planning phase. Near-real-time ACMs are
  expedited and once they are approved, should appear in ACO changes as historical data.
  B-4. Airspace elements request ACMs using airspace coordinating measure requests (ACMREQs).
  Airspace elements use ACMREQs for planning, requesting a change, and coordinating. Airspace elements
  use planned ACMREQs to develop the unit airspace plan (UAP) and nominate planned ACMs to higher
  headquarters as part of a future ACO. Airspace elements use ACMREQs submitted within the current ACO
  cycle to integrate and disseminate the change into the current ACO. Lastly, airspace elements use near-real-
  time ACMREQs for near-real-time coordination with external airspace agencies. These agencies include an
  Air Force CRC or Marines Corps DASC.
  TYPES AND USAGES
  B-5. The types and usages of ACMs are identified in table B-1a and B-1b on pages B-2 and B-3. This table
  lists the types of coordinating measures and their corresponding USMTF ACMs. The bolded ACMs reflect
  the most frequently used ACMs or ACMs of particularly importance to the Army. Special use airspace is
  denoted by an asterisk (*). Tables B-2 through B-10 (beginning on page B-4) provide additional details for
  the most frequently used ACMs.