What are the five common uses of compasses?

Compasses are often used in the following aspects:

(1) In ancient China, the compass was first used for sacrifice, etiquette, military affairs and divination, as well as determining the orientation when looking at geomantic omen.

(2) In China, modern compasses are often used in navigation, geodesy, travel and military affairs. The invention of the compass with physical direction indication has three parts, namely Sina, compass and magnetic needle, all of which belong to the invention of China.

Extended data:

Compass background: The earth is a big magnet. The poles of the earth are close to the geographical south pole and the geographical north pole respectively. When the magnets on the surface of the earth can rotate freely, they will indicate the north and south because of the nature that the magnets repel each other and attract each other-this truth was not understood by the ancients; But this phenomenon has been discovered by the ancients.

The application of compass in navigation has greatly promoted the great geographical discovery and maritime trade. The invention of the compass originated from the study of how the ancient people in China oriented, and also showed that the ancient people attached importance to how to orient. Therefore, the compass is known as one of four great inventions of ancient china.

In ancient China, compasses were used for military and maritime activities, and also for geomantic omen theory. Later, it was introduced to Europe, which played an irreplaceable role in European navigation and geographical discovery. In the invention of navigation technology, compass is also the most important single invention.

References:

Baidu encyclopedia-compass