The compass was first used and widely used in navigation, respectively,A, Sui Dynasty, Tang Dynasty, Song Dynasty, B C D, the Southern Song Dynasty, the Northern Song Dynasty and Southern Song Dynasty
This inference, "Meng Xi Bi Tan Shen Kuo in the Northern Song Dynasty," Ping Zhou can talk "about a book in the Southern Song Dynasty, the D.
Two years later, Xu Jing "declared in the Korea map" has a similar record: "but as the star forward, if the dark is used to guide the floating needle in North and south." In the Yuan Dynasty, the compass became the most important instrument in the sea. The sun and the moon are all compass. But also the preparation of the use of compass navigation, in different locations of the compass needle position of the connection diagram, called the needle road". Ship to a certain place, the direction of the needle to use, all routes are identified as one of the basis of navigation.
Once the compass was invented, it was applied to military, production, daily life, topographic survey and so on. There is a gradual development of the application of compass in navigation. The book was slightly later than the "Meng Xi Bi Tan Ping Zhou can" talk "in mind: boat geography knowledge, night viewing, the day becomes dark, the concept of the compass." This is the first time in the history of navigation in the world. It is pointed out that only when the sun and the moon can not see the use of the compass, the compass is just beginning to use, the use of unskilled.
