梦溪笔谈
Magnetic needle compass was developed in the 11th century and it improved the accuracy of navigation by employing the astronomical concept of true north ("Dream Pool Essays", 1088). That time, the Chinese scientist Shen Kuo (1031–1095) was the first person known to write of the magnetic needle compass , and by the 12th century Chineses were known to use the lodestone compass for navigation. In Europe, the first description of the compass and its use for navigation are of Alexander Neckam (1187), although the use of compass was already common. Its development, in european history, was due to Gioia from Amalfi