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- Lavanha also studied instruments used in navigation, constructing astrolabes, quadrants and compasses.
- Arab craftsmen produced complex astronomical instruments, astrolabes, which helped them plot the positions of the stars and tell the time of day.
- The construction of astronomical instruments such as the astrolabe was also a speciality of the Arabs.
- She was well known for her development and construction of astrolabes.
- Sophisticated instruments, which were to make possible the European voyages of discovery, were developed, including the astrolabe, the quadrant and good navigational maps.
- He also wrote works on astronomical instruments, for example on constructing and using an astrolabe.