Figure 2-40. A) MA-1 pilot chute and B) high-drag pilot chute with large hole mesh.  moving around in the aircraft or in the air. Fortunately, the  handle does not go far and is easy to obtain because it is on a  short lanyard that is tucked up under the side flap. . mounted on the belly band. Today, the primary location is an  elastic/Spandex$^{®}$ pocket mounted on the bottom of the main  container (BOC).  [Figure 2-43]  Most of the difficulties of this  design have to do with pilot chute in tow due to misrouting  of the bridle or failure of the pin to extract. The second type is the  pull-out pilot chute (POP) configuration.  This design has the pilot chute packed in the container, which  is locked with a straight locking pin attached to a short lanyard  and handle.  [Figure 2-44A and B]  This handle is usually  mounted on the bottom corner of the main container. The  parachutist grasps the handle and pulls the locking pin from  the locking loop and puts the pilot chute into the airstream. The  handle is usually attached to the bottom of the pilot chute and  as the chute enters the airstream, the jumper loosens his grip  on the handle allowing it to be pulled from his or her hand.  This makes for a positive deployment. The main drawback to  this system is losing the handle due to it being dislodged while  AADs are devices that activate the parachute automatically.  Modern systems combine a barometric sensor with a rate  of descent sensor so that the system is fully automatic once  turned on and calibrated. The activation may be by either  pulling the ripcord pin(s) or cutting the locking loop(s),  Safety considerations have led to the development of AADs  and reserve static line (RSL) systems. These devices allow  for automatic deployment of the main or reserve parachutes  in the event of an emergency. Automatic Activation Devices (AADs) and  Reserve Static Lines (RSLs)  Automatic Activation Devices  2-18