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Concept information

Instruments > Precision instruments > Nautical instruments > Octants

Preferred term

Octants  

Definition

  • Reflecting navigational instruments used for measuring the altitude of celestial bodies and having an arc of 1/8 of a circle, but due to their reflecting properties can measure up to 90 degrees; invented in the 1730s and used into the 19th century when superseded by sextants [AAT]

Broader concept

Notation

  • 121603

In other languages

URI

http://data.loterre.fr/ark:/67375/JLC-H3CCW1QK-M

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