Find information about the compass

CompassIt can be divided into a lens compass, a case-type compass, and a transparent baseplate-type compass.

1. Basic compass. This beginner-friendly type has the basic features of a north quiver, and is inexpensive, but lacks some of the convenience and assistive devices such as adjustable declination lines and scopes.

2. Professional compass. If you are an outdoor activity player who already has the technology to use the compass, it is better to spend more money to buy this kind of compass with multiple assistive devices, which can make it more convenient for you to use the compass to determine the direction.

3. Decorate with a compass. These compass are often used as key rings or in conjunction with watches, and often do not have a baseplate to place on a map. Their function is to be able to quickly point out the general direction of the north, but not very precisely to point out the rest of the directions.

The compass is a tool used to indicate directions, and is widely used in various directions, such as navigation, field exploration, and urban roads.

Map reading and other fields. It is also an indispensable tool for mountaineering expeditions, and its basic function is to harness the Earth's magnetic field.

function, indicating the northern direction of the void, it must cooperate with the map to seek a relative position in order to know where it is. It is with a compass.

The north pole of the magnetic needle points to the north pole of the geography, and the direction of the indication can be discerned by using this performance. But in some parts of the world, the compass is also called the compass.

The compass is used by:

That is, when measuring the target azimuth, the north of the site must be parallel to the north of the map square, and then the red line of the north arrow is aimed at the target place, and the angle between the target and the north of the square must be read out and the azimuth deviation angle of the map must be corrected, which is the target azimuth.

The compass should be zeroed before using the measurement target azimuth:

For example, the compass zeroing operation is a very important precursor to the use of the forest compass, and its steps are:

1. Place the compass horizontally.

2. According to the situation of the location, the magnetic deviation angle should be appropriately corrected.

If you want to point to the compass, you must first ensure the level of the compass, the pointer is generally pointing north and south, and the direction of the red or special color pointer is north, and then adjust the compass disc to be consistent with the direction of the pointer.

The compass is a tool used to indicate directions, and is widely used in various directions, such as navigation, field exploration, urban road map reading, and other fields. It is also an indispensable tool for mountaineering expeditions, its basic function is to use the earth's magnetic field to indicate the direction of the north, and it must cooperate with the map to find a relative position to know where it is. It acts the same as the compass, the north pole of the magnetic needle points to the north pole of geography, and the indicated direction can be discerned by using this performance.

But in some parts of the world, the compass is also called the compass.

The basic function of the compass is to use the earth's magnetic field to indicate the north direction, is a tool used to indicate the direction, the north arrow is also called the compass, widely used in various directions to identify and position, such as:

1. It is an indispensable tool for navigation, field exploration, and mountaineering exploration, and it cooperates with the map to seek relative positions in order to understand where you are.

2. The north pole of the magnetic needle points to the north pole of geography, and this performance is used to indicate the direction. It is used for the orientation positioning of urban roads, urban and rural buildings, and structures.

1. Those who have studied physics know that the two ends of the magnetic needle point to the north and south respectively, even if the magnetic needle is cut off, the remaining part will automatically form a new north and south poles, and one end still points to the north and the other end points to the south.

2. In ancient China, there was "Sinan", so it is also a traditional habit to call a compass in modern times. Some habits are not without origins, for example, we say that we buy things, but not buy north and south, there is also a reason.

3. In the ancient culture of our country, the south is yang, the north is yin, and the living are respected by yang. The emperor sat facing south and facing north, and the doors and windows of the main house were open to the south. Therefore, the direction is also mainly southern.

4. In our country, it is customary to call the compass, and it can also be called the compass, and it is called the compass in foreign countries and in the military field.

The earth itself is a large magnetic field, and according to the mechanical law of the magnetic field, magnetic objects attract opposite poles and repel each other. The Earth's magnetic field is oriented north-south, so the compass points north-south.

Specifically, the Earth is a large magnet with two poles close to the geographic south pole and the geographic north pole. Therefore, when the magnets on the earth's surface can rotate freely, they will be repelled by the same sex of the magnets, and the opposite sex attracts the opposite sex. The ancients didn't understand this truth, but they knew this kind of phenomenon very well.

According to the regulations, the magnetic needle indicates that the magnetic declination angle is positive if the north pole n is deviated to the east, and the magnetic declination angle is negative if it deviates to the west.

Magnetic declination'It refers to the angle between the north and the true north when the magnetic needle is stationary.

Shen Kuo recorded and verified the magnetic declination phenomenon of the magnetic needle "often slightly eastward, not completely southern" in "Mengxi Writings", which was 400 years earlier than the Western European record. Robert Norman, an Englishman, discovered that a magnetic needle was hung in the middle of the middle with a rope, forming a declination angle to the horizontal, which he called a declination. In 1581, he published his findings in his book The Attraction of Novelty.

In ancient China, there was "Sinan", so it is also a traditional habit to call a compass in modern times.

The compass is used by:

That is, when measuring the azimuth angle of the target, the north of the site must be parallel to the north of the square of the map, and then the red line of the north arrow is aimed at the target place, and the angle between the target and the north of the square must be read out and the azimuth deviation angle of the map must be corrected.

The compass should be zeroed before using the measurement target azimuth:

For example, the compass zeroing operation is a very important precursor to the use of the forest compass, and its steps are:

1. Place the compass horizontally.

2. According to the situation of the location, the magnetic deviation angle should be corrected when the circle is slow.