text: Appendix A
  of the airspace, associated restrictions, requests for access and other applicable coordination procedures. The
  details of each ACM are provided in the airspace control order. Airspace elements establish ACMs to
  accomplish one or more functions:
  * Establish reserved airspace for specific airspace users.
  * Restrict the actions of some airspace users.
  * Create airspace in which units can use weapons with minimal risk of friendly fire incidents.
  (Friendly fire incidents include death by fratricide, injury, and property damage.)
  * Control actions of specific airspace users.
  * Require airspace users to accomplish specific actions.
  A-103. Paragraphs A-104 through A-112 discuss some of the common airspace coordinating measures. (See
  JP 3-52 for a complete listing of ACMs and their uses see.)
  AIR CORRIDORS
  A-104. An air corridor is a restricted air route of travel specified for use by friendly aircraft established for
  the purpose of preventing friendly aircraft from being fired upon by friendly forces (JP 3-52). It is used to
  route Army aviation elements between areas such as holding areas and forward arming and refueling points.
  An air corridor’s altitude will not exceed the coordinating altitude prescribed in the airspace control order.
  There are seven specific uses of air corridors. Two examples of these uses are the minimum risk route and
  standard use army aircraft flight route.
  Minimum Risk Route
  A-105. A minimum risk route is a temporary air corridor of defined dimensions recommended for use by
  aircraft that presents the minimum known hazards to low-flying aircraft transiting the combat zone (JP 3-52).
  These routes are recommended by the ground commander and are used primarily for cross FLOT operations.
  They are established based on known threats and friendly unit locations. Aircraft executing close air support
  missions do not usually use these routes in the vicinity of the target area.
  Standard Use Army Aircraft Flight Route
  A-106. A standard use Army aircraft flight route is a route established below the coordination level to
  facilitate the movement of Army aircraft (JP 3-52). It is generally used by Army aircraft for administrative
  and logistic purposes. If a coordination level has been established the using authority can implement it as
  long as it remains below the coordination level. If no coordination level has been established the airspace
  control authority establishes it upon the ground commander’s request.