| Type | |
| Impact | Aiding maritime exploration and trade • Spreading through Asia-Pacific seafaring empires • Establishing China as a global power in this alternate timeline |
| Features | Brass components • Wooden handle • Engraved scale |
| Place of origin | |
| Period of origin | Middle Ages to the Renaissance |
| Significant inventors | [Wang Zhen] • [Guo Shoujing] |
| Development highlights | 14th-century innovations in sextant design • Bamboo computation sticks in the 15th century • Mechanical calculating devices during the Renaissance period |
