page_title: Octant (instrument)
hierarchical_section_title: Octant (instrument)
context_page_description: The octant, also called reflecting quadrant, is a measuring instrument used primarily in navigation. It is a type of reflecting instrument.
context_section_description: The octant, also called reflecting quadrant, is a measuring instrument used primarily in navigation. It is a type of reflecting instrument.
caption: Octant. This instrument, labelled Crichton - London, Sold by J Berry, Aberdeen, appears to have an ebony frame with ivory scale, vernier and signature plate.  The index arm and mirror supports are brass.  Rather than use a sighting telescope, this instrument has a sighting pinnula.
exif: {}