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  2. top of the aat hierarchies
  3. Objects Facet
  4. Furnishings and Equipment (hierarchy name)
  5. Measuring Devices (hierarchy name)
  6. measuring devices (instruments)
  7. [measuring devices for extent]
  8. distance measuring devices
  9. angle measuring devices
  10. vertical angle measuring devices
  11. sextants
Scope note
Astronomical instruments used for measuring angular distances, especially the altitude of celestial bodies, in order to determine the longitude and latitude of ships at sea.
Accepted term: 22-Jul-2024