人类刚从事航海的初期,船只的导航仅仅靠的是人的耳目,并依赖陆上的山丘、水中的浮叶、天上的流云、空中的星辰作为导航物标。随着航海事业的发展,各种导航技术和导航装置不断出现,日益完善。从我国明朝著名航海家郑和七下西洋时使用的罗盘(指南针)到发现好望角和新大陆时使用的磁罗经。 The mankind just engaged in the early days of navigation, the navigation of the vessel only relied on human’s eyes and ears and relied on the hills on land, the floating leaves in the water, the clouds in the sky and the stars in the sky as navigation targets. With the development of marine navigation, various navigation technologies and navigation devices are constantly appearing and improving. The compasses (compasses) that were used by the famous navigator of the Ming dynasty, Zheng He, to the western seas, and the magnetic compasses used to find the Cape of Good Hope and the New World.