| Metal astrolabes were heavier than wooden instruments of the same size, making it difficult to use them in navigation. |
| It housed compasses, surveying tools, astrolabes, and armillary spheres that evoked the world of Copernicus and Tartaglia. |
| In 1730 the sextant was invented and navigators rapidly replaced their astrolabes. |
| Arab craftsmen produced complex astronomical instruments, astrolabes, which helped them plot the positions of the stars and tell the time of day. |
| She was well known for her development and construction of astrolabes. |
| Lavanha also studied instruments used in navigation, constructing astrolabes, quadrants and compasses. |
