First, the watch method:
When someone finds a signal in various devices such as a GPS navigator, you only need to slowly roll up your sleeves and stretch out the claw that holds the watch to find out where the sun is. Then Sister Paper rushed up and pushed you to... Whether it is in movies, TV dramas or everyday life, more or less people will hear about using a watch to measure the direction. But what exactly do you know? not too much. Let's talk about the principle of watch law. The earth rotates about 15° per hour and the watch hour hand rotates 30° every hour, which means that the earth's angular speed is one half of the watch's hour rotation. To clarify this point, the watch method is very simple. First of all, the sun is going to be in the sky. You must have a watch on your hands (when someone asks a pocket watch to do it, if there is a pocket watch, if you carry a pocket watch, that's OK), the watch must show the time. It's the time in your place. The second step is to place the dial horizontally. The third step is to find out if you are in the northern or southern hemisphere. If you are in the northern hemisphere, point the hour hand at the sun. The angle bisector between the hour and the 12 o'clock scale is the north and south line. If you are in the southern hemisphere, point the 12 o'clock mark to the sun. The angle between the 12 o'clock and the hour hand The bisect line is the North-South line. Then just judge according to whether the sun is rising or not, which head is south and which is north (somebody asks if the sun rises from the west, it doesn't just change the direction of the east and the west, but it does not change.
Some people have asked if the watch is a digital one, it is actually possible, as long as the time is expressed in a 24-hour clock, and the current time is divided by two. Then use your imagination to simulate a dial with a pointer in the brain. Just after the division is done, the time scale obtained is aligned with the current position of the sun. The connection between the 12 o'clock and 6 o'clock directions is the North-South line. The last and most important point is that the direction of the wristwatch is not only influenced by the northern and southern hemispheres, but also by the position of the sun. If you are in the so-called waistline of the Earth between the Tropics of the South and the Tropic of Cancer, I advise you to give up this method of forsaking it. Otherwise, you will understand that "the most terrible thing in the world is to force it to fail..." The watch method does not apply around midday.
Second, the projection method
When someone reveals the count on your wrist and ridiculing your Casio for bandits with contemptuous eyes, try to use the bandit method to kill all the wealthy. While the sun is still in the sky, look for a branch or stick (about 20cm, try to find straight) and stand vertically on the ground. At this time, the branch will leave a projection on the ground (the top of this projection is called A. Point). Place a small stone on point A. The sun goes to the west to learn the scriptures, and the projection goes east. After 15 to 20 minutes, the projection has moved a short distance (refer to the top of this projection as point B) and put a small stone on point B. The line connecting the two points of AB is the east-west line (point A is west, point B is east), and the vertical AB line is drawn as north-south line. If unfortunately hit noon, put the branches slightly obliquely, and you can see the projection. In nature, the bandits are more useful ~
Third, look at the stars
The sun cannot stay in the sky forever. On a day's work, it must go home to eat and sleep. At night, whether it is the earl or the branches, there is no way to tell you the way home. Although it is not recommended to march at night, first, there is a limited field of vision in the evening, and some potential dangers cannot be detected in advance. After a long period of evolution, mankind is no longer suitable for night action. Second, it is a good day to go and lie down during the day. Enjoy the sky full of stars to make up for the tired body. But if you can find out what you need from the countless stars of the galaxy, besides being able to find the direction of advancement, perhaps Sister Paper will ask you to teach her how to recognize the constellation, and look for opportunities to watch meteor showers and the like. One is also very likely. Normally Polaris and Southern Cross are indicative of directions at night, and their relative positions are fixed, at least for the next five centuries. I believe that if you and the two stars are alive after 5 centuries, you can see them both on your head. The Polaris is located almost in the north of the sky and its exposed elevation angle corresponds to the local latitude. Based on the W stars of the Big Dipper or Cassiopeia, it can be easily determined that the Polaris connects the Spearstar with two stars and extends approximately five times; the brighter stars of the Celestial Constellation are shaped like “Wâ€. The letter's opening direction is about twice as wide as the width of the opening. In the area south of 23°30′ north latitude, it can sometimes be seen in the night that the south cross star, which is composed of four bright stars, is similar to the “åâ€. In this "slanted cross", the length of the four-and-a-half-length line connecting the two stars at the lower right is the direction of the south. If you're not lucky, you'll have a good night's sleep when it rains!
Fourth, the characteristics of nature
In fact, careful observation, there are many details in nature will tell you the direction. Generally, the following characteristics can be used to determine the approximate direction: 1) Plant growth: In the northern hemisphere, the south is generally better than the north, while the southern hemisphere is opposite. 2) Annual rings of broken branches: In the Northern Hemisphere, the annual growth of the faults is more dilute toward the south, with the north more dense and the southern hemisphere opposite. 3) Moss: Moss grows like yin, so the moss in the northern hemisphere usually grows on the rocks or the northern side of the tree, opposite to the southern hemisphere. 4) Melt snow: The sunshine in the southern part of the northern hemisphere is stronger than in the north, so the snow toward the south melts first and the opposite in the southern hemisphere.
Postscript: When lost in the outdoors, the most important thing is to calm down and observe carefully. Maybe we are not born with direction-awareness like pigeons, but we have the potential to find a way home.
This article is transferred from: Outdoor Sports Synthesis
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