text: Security Operations
  5-33. Maneuver of the screen elements to subsequent positions is event-driven. The approach of an identified
  and specified threat element that answers PIRs, relief by a friendly unit, or movement of the protected force
  may dictate displacement. Collapsing the screen, executed by well-rehearsed drills performed at all levels,
  provides security, and maintains contact for the unit as it displaces. The BCT commander can place a time
  requirement on the duration of the screen if the intent is to provide a higher level of security to the BCT or to
  provide a tentative period for subordinate unit planning and follow-on missions.
  SCREEN TASKS
  5-34. Execution considerations guide screen planning. Execution considerations for a screen include the
  following and are conducted within capability:
  * Maintain continuous observation of all avenues of approach that affect the main body’s mission.
  * Conduct counterreconnaissance to destroy, defeat, or disrupt all enemy reconnaissance elements
  according to engagement criteria. Allow no enemy ground element to pass through the screen
  undetected and unreported.
  * Locate and identify the lead elements that indicate the enemy’s main attack, as prescribed in the
  enemy’s order of battle based upon the IPB (when facing an echeloned enemy force).
  * While displacing, determine the direction of enemy movement, maintain contact, and report
  threat activities.
  * Maintain contact with the protected force and other forces operating on its flank.
  * Detect and report all enemy elements attempting to pass through the screen, both ground and
  aerial, and provide the protected force commander early warning of enemy activities.
  * Maintain contact with enemy forces, and report activity in the assigned area.
  5-35. To enhance the effectiveness and depth of the screen, the squadron’s subordinate elements conduct
  reconnaissance handover or battle handover to pass contact from one element to another. In this way, the
  methods of reconnaissance management (cueing, mixing, and redundancy) and task organization maintain
  threat contact and protect the main effort following the commander’s intent.
  STATIONARY SCREEN
  5-36. A squadron executing a stationary screen mission (see figure 5-1, page 5-10) requires the following guidance:
  * General trace of screen and time it should be established.
  * Commander’s security guidance.
  * Information collection plan.
  * Width of the screened sector.
  * Identity of screened force.
  * Rear boundary of the screening force.
  * Possible follow-on missions.
  5-37. The tasks required of a screening unit are minimal compared to other security missions. Therefore, the
  screening force may have a wide frontage. Usually, units deploy abreast with troops established in-depth.
  5-38. A PL placed along identifiable terrain graphically indicates the FLOT and can serve as an LOA. When
  screening forward of the BCT, this PL represents the forward line of the screening unit troops. A boundary
  depicts the rear limit of the screen. The screening force is responsible for the area between the screened force
  and the rear screen boundary. The boundary may serve as a BHL or a reconnaissance handover line. The
  screening force uses other PLs to control forward and backward displacements of subordinate units of the
  screening force and to aid in reporting and orientation. The screening force designates sectors to control lateral
  movement of subordinate units.