text: Chapter 5
  this reason, whenever an aircraft seems to be having trouble, all members of the ground crew should clear
  the slingload point by moving to a location coordinated with the aviation unit. Once they have moved far
  enough away, they should each take a prone position or seek cover until the aircraft lands. Two
  responsibilities require special note:
  Signalman
  5-82. Face the aircraft; move to a safe spot.
  Hookup Men
  5-83. Try to work along the same side of the load as your assembly area, or as coordinated. This way,
  you do not have to climb over or go around the load to seek safety. You can instead move directly off and
  away from the load. If the load is a heavy piece of equipment, you might want to keep the load between
  you and the aircraft while you are moving. This offers you some protection if the aircraft were to crash.
  GROUND CREW DUTIES
  5-84. Normally, the ground crew consists of one signalman and two hookup men, with one hookup man
  acting as static wand man.
  Signalman
  5-85. Duties of the signalman include the following.
  Before the Aircraft Arrive(s)
  5-86. Direct the positioning of the load. Supervise the inspection of the load for proper routing of the
  slings and proper preparation. Ensure that the load is ready to fly.
  As the Helicopter(s) Approaches
  5-87. Station yourself 20 meters in front of the load where you can best maintain eye contact with the
  crew. Give the arm-and-hand signal of "assume guidance." As the helicopter nears the load, use
  arm-and-hand signals to position the cargo hook directly over the load, close enough that the hookup men
  can place the apex fitting onto the cargo hook. During this time, position yourself so the pilot can see your
  signals easily. Because the pilot of an Army aircraft sits on the right side of the aircraft, you will usually
  stand just to the right of the aircraft. If the terrain forces you to stand somewhere else, make sure the pilot
  can see you at all times.
  During the Hookup Process
  5-88. Watch the cargo hook and apex fitting. After hookup, the pilot hovers the aircraft until the hookup
  men clear away from the load. When they have moved clear, you will signal the aircraft upward slowly, so
  the sling legs gradually take up the load. You must do this to make sure the sling legs clear the load. If the
  sling legs foul, motion the pilot downward, and then instruct him to cut away the load. If you did a good
  job of hooking up the load, and if the load suspends properly below the aircraft, then give the aircraft the
  signal to depart. Then move quickly aside to clear the helicopter's path.