| He also made navigation instruments, including astrolabes and quadrants. |
| In 1730 the sextant was invented and navigators rapidly replaced their astrolabes. |
| Universal astrolabes can be found at the History of Science Museum in Oxford. |
| She was well known for her development and construction of astrolabes. |
| The place is stored with great variety of sextants, quadrants, telescopes, astrolabes, and other astronomical instruments. |
| Some astrolabes have a narrow rule or label which rotates over the rete, and may be marked with a scale of declinations. |
