text: Chapter 4
  VERTICAL AIR CURRENTS
  4-125. Updrafts on the approach path make landing easier. However, severe vertical air currents (updrafts
  or downdrafts) might require the pilot to approach downwind.
  ESCAPE ROUTES
  4-126. The pathfinders and pilots should plan one or more escape routes along the approach path for the
  pilot to use if he must go around and try the approach again.
  TERRAIN CONTOUR AND OBSTACLES
  4-127. The height of terrain and obstacles along the approach path should permit the pilot to conduct a
  shallow approach angle into the landing site. When possible, the pathfinders select a landing point on or
  near the highest terrain feature.
  POSITION OF THE SUN
  4-128. Though the pilot first considers wind direction and nature of the terrain when choosing the
  approach path, he must also consider the relative location of the sun and shade. To keep the pilot from
  having to adjust from one light condition to another, the pathfinder makes sure that if the landing point
  falls in a shaded spot, the whole approach path does as well. When the sun rises or falls to just above the
  horizon, avoid using an approach path that faces directly into it.