text: Rehearsals
  REHEARSAL PREPARATION
  D-36. Once the decision has been made on the type of rehearsal and when and where it will occur, preparation
  begins. Everyone involved in executing or supporting the rehearsal has responsibilities during preparation.
  D-37. Commanders provide the requisite guidance for the rehearsal. They identify and prioritize key events,
  allocate time for each event, and review the completeness of unit's organization, readiness of personnel and
  equipment, and the unit's level of preparation.
  D-38. The executive officer is the rehearsal director. Through wargaming and coordination with the
  commander, the executive officer—
  * Coordinates and allocates time for key events requiring rehearsal.
  * Establishes rehearsal time limits per the commander's guidance and mission variables.
  * Verifies rehearsal site preparation, appropriate markings and associated training aids and parking
  areas.
  * Determines the method for controlling the rehearsal and ensuring its logical flow.
  D-39. The headquarters' staff conducting the rehearsals—
  * Develop an operation order with the necessary overlays.
  * Deconflict all subordinate unit graphics.
  * Publish composite overlays at the rehearsal.
  * Nominate a recorder.
  D-40. Subordinate leaders complete their planning; this planning includes—
  * Complete unit operation orders.
  * Identify issues derived from the higher headquarters' operation order.
  * Provide a copy of their unit operation order with graphics to the higher headquarters.
  * Perform personal preparation similar to that of the commander.
  * Ensure they and their subordinates bring all necessary equipment.
  D-41. Preparatory actions vary for each rehearsal method. The following example depicts those actions
  required during a terrain-model rehearsal.
  * When the commander choses the terrain model technique, the site must be prepared to replicate
  the operations graphic and fire control measures and terrain features. To aid the preparation, the
  operations center should maintain a terrain model and sand table kit.
  * The size of the terrain model or the time available may necessitate using additional personnel for
  preparation. The size of the terrain model can vary from a table-top arrangement (sandbox) to a
  model where the participants actually review a scaled-down version of the terrain. A terrain model
  large enough to allow the key leaders to walk over a scaled-down version of the terrain helps
  participants to visualize the battlefield.
  * The first step in creating an accurate terrain model is to prescribe the scale. This is easily
  accomplished by walking off several steps per kilometer or using some other form of
  measurement. For example, if the zone of attack is 10 kilometers by 6 kilometers, the builder of
  the terrain model could assign one step per kilometer and walk off the scale of the terrain model.
  * The second step is to lay down selected grid lines based on the tactical map. With the grid lines
  established, the builder has a handy reference to measure the size and locations of the terrain
  features. This simple step greatly increases the accuracy of the terrain model and ensures that the
  terrain features are the proper scale.
  * The terrain model should depict all required information shown on the operations overlay and
  situation map to include key terrain features, enemy positions (known and suspected), and airspace
  coordinating measures. Place an arrow on the terrain map to depict north for orientation. Label all
  phase lines, numbered hills, and objectives with their appropriate names. The terrain should mirror
  the operations and enemy overlays and include the air portion of the IPB. Once the terrain model
  is complete, position a map and operations overlay behind or at the side of the model as a point of
  reference.