text: Appendix D
  * Immediately after the OPORD has been issued, to ensure the mission, intent, and tasks to
  subordinate units are understood.
  * After the subordinates have formulated their concept of the operation, but before the subordinate
  OPORDs are issued. This is to ensure the subordinate's plans are consistent with the commander's
  intent and mission.
  D-7. SHORAD commanders and leaders may not have the luxury of face-to-face backbriefs. Commanders
  and leaders may have to use other communications means, such as the radio, to get their backbriefs.
  Subsequent backbriefs are especially difficult to have face-to-face due to the physical dispersion and
  commitment of the various commanders; the SHORAD battalion is especially limited in the ability to gather
  battery commanders.
  COMBINED ARMS REHEARSAL
  D-8. A combined arms rehearsal is a rehearsal in which subordinate units synchronize their plans with each
  other. A higher unit's headquarters normally executes a combined arms rehearsal after subordinate units issue
  their OPORD. This rehearsal type helps ensure that subordinate commander's plans achieve the higher
  commander's intent. When SHORAD commanders choose to conduct a combined arms rehearsal with their
  subordinate unit, they must select one (or a combination) of the available rehearsal methods and focus on the
  effective execution of the operation.
  SUPPORT REHEARSAL
  D-9. A support rehearsal helps synchronize each warfighting function with the overall picture. Throughout
  preparation units conduct support rehearsals within the framework of a single or limited number of
  warfighting functions. SHORAD commanders participate in the supported unit's rehearsal and must
  maximize the time they have during this rehearsal. Support rehearsals and combined arms rehearsals
  complement preparations for the operation. The following is an example of a sequence the air defender could
  use during a rehearsal:
  * Point out enemy air avenues of approach, possible aerial enemy targets, landing zones and drop
  zones in the units' area and the expected aerial platform that the unit may face.
  * Address actions on air attack during the rehearsal's particular critical action(s).
  * Point out the locations of ADA assets (fire units, sensors, and ADA command posts).
  * Address any synchronization issues necessary to get SHORAD assets in the right place at the right
  time.
  * Address actions taken to mitigate or defeat air attacks during the rehearsal's particular critical
  action(s).
  * Address combined arms for air defense.
  * Disseminate the early warning plan emphasizing the need to rebroadcast early warning over the
  supported unit command nets.
  BATTLE DRILL OR STANDARD OPERATING PROCEDURE REHEARSAL
  D-10. Battle drill or SOP rehearsal is a collective action rapidly executed without a deliberate decision
  making process. A battle drill or SOP rehearsal ensures that all participants understand a technique or a
  specific set of procedures. SHORAD commanders can identify one or more specific procedures and/or
  techniques, they consider critical or essential for the success of the operation.
  METHODS OF REHEARSAL
  D-11. There are several methods for executing rehearsals. These techniques are arranged by the amount of
  time and resources needed and available to conduct each method (see figure D-1 on page D-3). The first step
  in rehearsal planning is to determine the rehearsal method the unit will use to practice the operation prior to
  execution. As listed from left to right in the figure, each successive method takes more time and more
  resources. Each method also imparts a different level of understanding to participants.