text: Battle Drills
  REACT TO AIR ATTACK
  H-13. The first Soldier who hears or sees an aircraft gives the "freeze" signal. The first Soldier who sees
  an attacking aircraft alerts, "Aircraft, front (left, right, or rear)." The team moves quickly into a line
  formation, well spread out, perpendicular to the aircraft's direction of flight. As each Soldier comes on line,
  he goes prone, using available cover. Between attacks, the team should seek better cover and concealment.
  If the team leader wants the team to move out of the area, he gives the clock direction and distance
  (Figure H-4).
  Figure H-4. React to enemy air attack.
  H-14. After the team consolidates and reorganizes, it moves to the last rally point. The team should
  engage the aircraft only as a last resort. Using the head-on method, they mass fires to engage attacking
  aircraft. They engage slow-moving aircraft at 50 meters and fast-moving aircraft at 200 meters. If the team
  receives fire, the team leader decides whether to continue the mission, move out of the area, or return fire
  on the aircraft.
  H-15. Another technique is to disperse into two groups of three Soldiers each or three groups of two
  Soldiers each. On sight of the aircraft, the team leader designates a rally point and gives the command to
  disperse. On linkup, the team leader assesses the situation and either calls for extraction or continues the
  mission.