Walking in the desert how to tell the direction

Walking in the vast desert, because of the open vision, it is difficult to find a directional reference, coupled with rolling sand dunes, tall sand mountains and depressions, people generally can not go straight, so the correct direction of the desert march is desert exploration Prerequisites.

Use the instrument to determine the direction

Using compasses and icons to set the direction is a common method used in early desert adventures. This method must first know where it is located. The base location icon sets the location and azimuth of the target area, and then travels according to the azimuth indicated by the compass. Since it is impossible to march along a straight line in the desert, it is necessary to continuously correct the position when using this method, otherwise it is difficult to reach the intended target. In long-distance desert expeditions and crossings, it is very difficult to arrive at the destination accurately or to find pre-cast supplies in the sand. In the late 1980s, the popularization of the lower c/oPS in the Song Dynasty had reduced the possibility of losing people in the desert. At present, almost all desert expeditions use GPS navigation. Sand Sea Traveling - Judging Direction Correctly

Using natural features to determine direction

(1). Azimuth is determined by the Polaris. The Polaris is a brighter star in the sky of the True North. It finds the North Star at night and finds its true north. Polaris is a star of the constellation Ursa Major, Ursa Major (mainly the Big Dipper) and the Celestial Constellation are on both sides of Polaris. Our country is located in the northern hemisphere and can see Polaris all night and night.

(2) Using the direction of the sun to determine the direction of the sun The east and west are the most reliable “pointers”. The sun moves from east to west while the shadow moves from west to east. For example, in the desert in the west of China, in the morning, the sun rises from the east, and the shadows of all objects fall to the west. At noon, the sun is located in the south, and the shadows point to the north. In the afternoon, the sun goes to the west and the shadow points to the east. Uighur camels that have lived for generations around the Taklamakan desert are walking in the desert in this way and will never lose their way. Of course, there are some more accurate ways to determine the direction, such as "immediately seen" method, watch judgments and so are useful in desert exploration.

(3) Judging the orientation of sand dunes The direction wind is an important factor in shaping the desert landforms. In northwestern China, due to the prevalence of northwesterly winds, sand dunes usually form a southeast trend. The northwest side of the dunes is windward, with a small gradient and hard sand. Southeast leeward, large slope, soft sand. In addition, plants in the desert, such as Tamarix, Haloxylon ammodendron, and camel spines, are tilted to the southeast. However, it is still necessary to explain here that the above is the general characteristics of the desert area, the wind direction is also different for different regions, and the direction of the sand dunes is also different. To obtain correct judgments, the meteorology and topography of the target area must be known in advance.