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  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. horizontal angle measuring devices
  11. gyrocompasses
Scope note
North-seeking navigational devices containing a gyroscope and used as a vehicle's directional reference.
Accepted term: 15-Jul-2024