Rehearsing decontamination may be a Level III, full-scale, Type A rehearsal on actual terrain when a unit must cross a known contaminated area. Special rehearsals do not replace other rehearsals. Rather, they augment, supplement, or reinforce other maneuver rehearsals. Special rehearsals may be conducted at any time during the troop-leading procedures, just like any other rehearsal. There several techniques for rehearsing.
Time is the deciding factor in determining which method is used.
The regimental staff should select rehearsal sites that facilitate the type of rehearsal being conducted. Consider the factors of METT-T to ensure the site is secure, large enough to allow the type of rehearsal selected, and when possible, allows a view of the area of operations. Participants should come with maps, overlays, and binoculars. Regimental staffs plan for and provide security from ground and air attacks. A rally point is identified in case the rehearsal site is attacked.