5-47. In an arid environment, consider the time, effort, and material needed to make a shelter. If you have material such as a poncho, canvas, or a parachute, use it along with such terrain features as rock outcroppings, mounds of sand, or depressions between dunes or rocks to make your shelter.
5-48. When using rock outcroppings, you should—
Anchor one end of your poncho (canvas, parachute, or other material) on the edge of the outcrop using rocks or other weights.
Extend and anchor the other end of the poncho so it provides the best possible shade.
5-49. In a sandy area, you should—
Build a mound of sand or use the side of a sand dune for one side of the shelter.
Anchor one end of the material on top of the mound using sand or other weights.
Extend and anchor the other end of the material so it provides the best possible shade.