text: Chapter 3
  level of security is required. If the enemy situation is unknown and time is limited, the aviation force
  conducts a movement to contact through the security area to establish the screen at the LOA or prior to the
  LOA if contact is gained with the enemy main body or a superior enemy force. If the enemy situation is
  known and no substantial enemy forces are in the security area, the aviation security force can move
  rapidly along planned routes to quickly establish the screen at the LOA. If time is available, the enemy
  situation is vague, and/or the protected force commander requires detailed information in the security area,
  the aviation security force conducts a zone reconnaissance to establish the screen line at the LOA or once
  contact is gained with the enemy main body or a superior enemy force.
  3-96. When conducting a security mission forward of a moving force, the aviation security force conducts
  a zone reconnaissance or movement to contact forward of the ground security force; assists in maintaining
  contact between the security force and the main body; assists in disengaging ground units, especially when
  conducting battle handover and passage of lines with the main body; and conducts reconnaissance of terrain
  that is hard to reach or would require too much time to cover with ground reconnaissance assets. The
  technique used depends upon the requirements of the protected force. If the force is moving through
  complex or unknown terrain, a zone reconnaissance is conducted far enough forward of the moving
  protected ground force to locate enemy forces while providing the protected force with the required
  information on trafficability of routes and movement corridors to enable freedom of maneuver. If the
  terrain is known or easily trafficable and the enemy situation is unknown or vague, the aviation security
  force conducts a movement to contact in zone with adequate distance to provide early warning of enemy
  actions to allow the protected force time to react.
  3-97. When conducting a flank security mission for a moving force, the aviation security force may use
  three techniques to occupy the flank security area:
  * Aviation security forces cross the line of departure separately from the main body and deploy to
  perform the mission to the flanks. This is used when the enemy threat situation is known to be
  low (figure 3-15).
  Figure 3–15. Aviation assets conduct flank security in support of a BCT reconnaissance and
  main body movement
  * Aviation security forces cross the line of departure separately from the main body with lead
  elements conducting a movement to contact while trail elements occupy the flank screen. This is
  used when the enemy threat situation is unknown but knowledge or trafficability of the terrain is
  known (figure 3-16, page 3-25).