There was a field team that had lost its way in a deep valley, and what was the best way for them to

The order of each scheme from top to bottom is as follows:

Positioning: Directly read the latitude and longitude of the location, you can set the latitude and longitude of the destination, and then follow the prompts. Accuracy: 100%, Disadvantages: Dense vegetation or poor weather conditions will affect signal reception;

2.Surface water flow direction: Walk along surface water (river, stream, or active ravine) through valleys. Accuracy: Not verifiable.

3.Compass: Determines the route based on the direction of the pointer. Accuracy: 90%, Disadvantages: If there are metal mines or other factors that cause magnetic field disturbances nearby, this method will exacerbate the degree of disorientation;

3.Topographic map: Compare the actual terrain with the actual terrain to determine the direction and travel route. Accuracy: 90%, disadvantages: it is not easy to observe the terrain when the vegetation is dense;

4.Sun Altitude Angle: Use the sun altitude angle to determine the direction. Accuracy: 70; Disadvantages: It is not easy for ordinary people to master, and it is not easy to implement in places with dense vegetation;

5.Plant growth and laydown: Take advantage of the sun-facing characteristics of plants to the south of the dense side of the plant. Accuracy: 30%; Disadvantages: Not suitable for places with lush vegetation.

Steering: Use the objects available around you to tie a cross (must, don't believe that you can turn exactly 90 degrees), put it on the ground and use it to turn 90 degrees, which can eliminate the influence of the so-called "ghost hitting the wall" to a certain extent. Accuracy:

10%, disadvantages: the accuracy is too low, there is a risk of falling into another "ghost hitting the wall".

Make use of a compass and a map.

Method 1: You can find a tree stump to observe, and the width of the growth rings is south.

Method 2: Find a tree with lush foliage on the south side and sparse foliage on the north side.

Method 3: Observe the ant's burrow, most of which are facing south.

Method 4: In a place with a lot of rocks, you can also find an eye-catching rock to observe, the mossy side of the rock is the north side, and the dry and bare side is the south side.

Method 5: You can also use the watch to identify the direction: divide the time you are in by 2, and then point the resulting quotient to the sun, and the direction pointed by 12 on the dial is north.

Copied. But it seems to be so.

Compass, cut trees, and then watch the rings, watch the sun rise in the morning, and watch the sun set in the evening.

Big Dipper,,, tree rings,,, sun,,, leaves,,, compass,,, GPS,

There are many ways to orient yourself in the field, such as using a compass to orient yourself; Use the North Star to set the course; Determine the direction of the sun as it rises in the east and sets in the west, and actively observe the surrounding terrain and the plants around you to determine the correct position

So the answer is: 1) use the compass for orientation; (2) Orienteering with Polaris